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  • Survey  (121)
  • Population  (75)
  • Chemical  (54)
  • Feeding  (48)
  • Chemistry
  • Iranian Fisheries Science Research Institute  (272)
  • 2015-2019  (272)
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  • 1
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    The survey on aquaculture capacity of Ghar-khatlo dam reservoir in Zanjan province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Qhar-khetlu dam reservoir is in the central part of Ijrud city of Zanjan province with a reservoir volume of 500000 and a water volume of 900000 cubic meters, covering an area of 6 hectares and containing 3500 hectares of the watershed in order to control seasonal floods, drinking water in the village, strengthening the aquifers of the area and As a water supply in the dry seasons, 120 hectares of agricultural land was planted for irrigation.Study of this water source with the aim of measuring biological and non-biological factors, determination of aquaculture production and Fish release capacity and fishing capacity for optimal use of fishery management in Zanjan province was done in 2006.The results of hydrochemical analysis of the water of Qharkhetlu dam reservoir showed that the minimum and maximum temperature of water ranged from 4.5 to 26 ° C, the pH of the water was 4.7 to 8.8, the dissolved oxygen was 7.7 to 12.2 mg, the total water hardness fluctuation was 154 194 mg / L and electrical conductivity of 272 to 390 micrometers per square centimeter, the water transparency was 25 to 380 centimeters.In this study, six phytoplankton classes with 31 genera and 3 classes of zooplankton with 14 genera were obtained. The abundance of phytoplanktons was counted from 150,000 to 206,000 per liter, and the average chlorophyll a, 1.10 micrograms, was estimated. The frequency of zooplanktons were 32 to 132 per liter, as well as the mean of 544 per square meter of macrobenthos.By comparing of the physical, chemical and biological factors and also the results of previous studies of this water source, the conditions for the introduction of warm water and cold water fishes including silver carp, big head carp, rainbow trout out and native fishes including species of Barbus and Capoeta genera are suitable. Estimation of Qhar-khetlu dam reservoir production is 80 kg / ha and its production capacity is 484 kg per year.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Fish Production ; Survey ; Aquaculture ; Transparency ; Zooplankton ; Phytoplankton ; Barbus ; Capoeta genera ; Chlorophyll a
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 70pp.
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  • 2
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    Survey on stocks of Caspian Sea mullets ( Liza aurata ; Liza saliens ) in Iranian coastal waters of the Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study was conducted to determine growth parameters, catch and fishing effort trends, stock assessment and Acceptable Biological Catch (ABC) of Caspian Sea mullets in the Iranian coastal waters of Caspian Sea in the fishing season of 2012-2013. For gathering of data on biometry and catch statistics, 5 mobile working group in the regions of Anzali , Kiashahr , Nowshahr , Babolsar and Torkmen were involved from the start to the end of fishing season.Gathered data Were entered to the computer. For data analysis , common methods were undertaken for estimation of growth parameters , mortality rates , biomass and Maximum Sustainable yield ( MSY ) and Acceptable Biological Catch ( ABC ) as well. . According to the result, the number of beach seines cooperatives was 124 and fishing efforts were 45260 beach seining haul . The catch per unit of effort CPUE) was calculated 37 kg/haul during this fishing season . The total catches of Caspian Sea mullets (including illegal fishing estimated as 2151 mt. Growth parameters of golden gray mullet ( Liza aurata ) were estimated as K=0.12 /yr, L∞ = 59.24 cm, t0 = - 1.31 /yr. Based on catch-at-age data, in the fishing season of 2012-2013 , the total biomass, from the biomass-based cohort analysis were estimated 11321.6 mt. The reference points of F0.1 and F30% were estimated 0.3 /yr . based on these results , the fishing mortality rate in fishing season of 20122013 were very closed to these reference points . In this survey , the Maximum sustainable yield and Acceptable biological catch were estimated as 2207.7 and 1981.4 mt respectively .Results of biometry of leaping gray mullet (Liza saliens) showed that the mean length and weight of this species were 28.8 ± 3.4 cm and 230.5 ± 74.8 g respectively . Based on these results and due to decline of golden gray mullet stocks , it is recommanded to reduce fishing effort and harvest keep to the level of MSY and ABC .The study of spawing condition of golden gray mullet in new situation of this species is also recommanded .
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Mullet ; Growth parameters ; Biomass ; Acceptable biological catch ; Survey ; Stocks ; Liza aurata ; Liza saliens ; Mortality rates ; CPUE ; Illegal fishing ; Golden gray mullet ; Spawning
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 60pp.
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  • 3
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    Investigation on the shelf life and quality changes of tilapia during storage , and it’s consumer acceptability (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this study، effects of slow and quick freezing، different packaging methods on quality of red and black tilapia and consumer acceptability of tilapia were investigatied. For preparation the samples for inveatigation the effects of slow and quick freezing methods on quality of tilapia، fresh tilapia fillets were frozen by slow and quick frozen methods. Slow frozen samples were prepared by storing the packed fillets directly in the -18 C°. The sprila freezing tunle with -30C° was also used for preparation the quick frozen sample. The quick frozen samples were then stored at -18C for six months. Proximate composition، fatty acid profiles، TBA، PV، TVN، Total cuont، Drip loss، and sensory evaluation of the samples were determined in every month. Scanning Electron Microscopy (SEM) was used for study on the effects of the frozen condition on the microstructure of the fillets. Results indicated that two different frozen methods had significantly different effects on the quality of the samples. Most of the proximate composition (protein، moistre and fat) reduced during the storage. Quick frozen samples had significantly (P〈0.05) lower reduction than slow frozen samples. All of the chemical quality indexes (PV، TBA، and TVN) increased during the storage as compered to the fresh samples. In these paramethers، the slow freezing had higher changes than quick freezing metods (P〈0.05). The microbial properties of the samples showed decrese during the storage. Lower amont of total cuont was observed at the end of the storage time in the quick frozen samples than slow frozen once (P〈0.05). The large changes in the fatty acid profiles of the sample were fond in all samples. During the storage SFA and MUF of the samples increased however، the PUFA decresed. A lower change was obseved in the quick frozen samples than slow frozen samples (P〈0.05). Drip loss was increased in both frozen samples during the storage period. The percentage of the drip in the slow frozen samples was significantly higer than quick frozen samples (P〈0.05). SEM micrographs were also showed that the chnges in the microstructur of the samples was different in the slow and frozen samples. Slow freezing methods had higher damge in the microstructure of the sample then quick freezing mathods. Sensory evaluation of the samples indicated that a better acceptability in the quick frozen samples than slow frozen sample (P〈0.05). For study the effect of some different methods of packaging fresh fillets were packed Modified Atmosphere Packaging (MAP) (40% CO2، 5% O2 and 55% N2) Vacuum Packaging and normal and stored in the refrigerator's. The packaged samples in these methods were examined for 10 days with regard to the changes in chemical (TVN، PV، pH)، microbial (total viable count) and organoleptic agents. The results indicated that the samples packed in MAP conditions had higher quality than that of the other methods at the end of the storing period. In addition، the slower destructive impacts and microbial growth was observed in MAP. According to the obtained results، we can suggest that the packaging of tilapia under MAP conditions resulted in the increase in the durability، storing، and distribution period of fillets. Consumer acceptability of tilapia was also investigated in this research. For this research، 300 farmed Nile tilapia (Oreochromis niloticus) and 300 Red tilapia (Oreochromi. niloticus × Tilapia mosambicus) were collected from the salt water fish research station located in Bafgh Yazd. The fish were transported to the National Fish Processing Research Center by using CSW method. Two methods were used for the study. First method was based on the sensory evaluation. In this method the fish fillets were cooked with Tuster and then the cooked sample were tested by 8 trained panelists. The second methods was established by Central Location Test ) CLT) In this method the fish fillet were fried in sun flower oil and tested by 276 consumers of three provinces ( Theran، Gillan and Mazanderan). 9-point scale (1 = very bad، 9 = very good) was applied for investigating the acceptability level of the samples. Evaluation questionnaires of consumers were designed based on the CLT method and after evaluating the reliability and validity of the questionnaires. The proximate compositions of the fillet were also determined. Results showed that the mean acceptance rates of both species of tilapia did not have significant differences in all three provinces. However، comparing the acceptance rates of black fillets in Tehran (7/05)، Guilan (6/24) and Mazandaran (6/56) and red fillets in Tehran (6/91)، Guilan (6/19) and Caspian (6/59) showed significant differences in both samples. Results showed that the tilapia meat had between 1.30 – 1.68% fat، 18.70-19.26 protein، 78-79% moisture and 1.34-1.8 % ash.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Chemical ; Microbial ; Nile tilapia ; Red Tilapia ; Freezing ; Packing ; Consumer ; Acceptabilty ; Black tilapia ; Sample ; Fatty acid ; Protein
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 197pp.
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  • 4
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    Biotechnics of live feed (Chironomidae) culture for using in feeding of cultured aquatics (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Larvae of the chironomid midges (blood worms) are known as use full live food for cultured aquatics. There are endemic blood worms in sediments of the earthponds of Bafgh area at center of Iran. This study tended to identification of two chironomid species, Chironomus aprilinus Meigen, 1830 and Dicrotendipes sudanicus Freeman, 1959 & 1961, from Iran as a new record. Culture of blood worms was successful in glass thanks with 16h. light, at 24-26°C temperature. Eggs were incubated after 14 days. Suitable concentration of harvesting is 1-2 egg masses (1250eggs/m2). Enrichment of earthponds or plastis thanks including sedime is offered for culture of chironomid larvae. Collectors prepared with low cost materials are useful for collection of egg masses. May, June and July are the best time for egg collection. Large blood worms are mainly avalable in winter. Results of body analysis of the larvae indicated high dry matter with good quality.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biotechnic ; Chironomid ; Identification ; Culture ; Collector ; Brackish water ; Chironomidae ; Aquatic ; Larvae ; Blood worm ; Sediments ; Species ; Chironomus aprilinus ; Chironomus aprilinus ; Feed ; Feeding
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 48pp.
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  • 5
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    Feasibility study on development of artificial reefs in the Persian Gulf (Hormuzgan province) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Persian Gulf waters (areas of Hormuzgan province) in order to determine the best location for installation of Artificial reefs were studied seasonally from December 2006 to March 2007. Distribution of funa and flora and estimation of deposit depth by SCUBA diving method, density and frequency of macrobenthose communities, frequency of ichthyoplankton communities, determination of organic carbon (OC) and Grain size and measurement of water physical factors including salinity, saturation oxygen, dissolved oxygen, temperature, chlorophyll a, in transect and subtransect was studied for recognizing the best placement to installation of artificial reefs. All areas of Shipping, military areas, around of Islands, natural habitats and entrance to jetty were introduced for excluding areas. South of Qeshm Island (transects of Bahman jetty, Bandar Masen and Bandar Salakh) are catching area for small pelagic (sardine and anchovy fishes), therefore in these areas installation of artificial reefs have confined with this restriction. Also entrance to Bahman jetty, sea plant habitats (sea grass and algae) in transects of Bahman jetty and Bandar Masen were considered as restricted areas. In this area, suitable areas for installation of artificial reefs was determined based on distribution of Ichthyoplankton societies for every transect, for macrobenthose enrichment Bahman jetty transect was calculated middle, but transects of Bandar Masen, Hengam island and Bandar Salakh was done good indicator. The deposition depth in transects of Bandar Masen and Hengam island was determined as good factor but this index was known as average factor for transects of Bahman jetty and Bandar Masen. Also, two another indicators, primary production and bottom sturdiness, were calculated as middle factor for Bahman jetty transect, but these indicators were known as good factors for other transects in this area (Bandar Masen, Hengam island and Bandar Salakh). The results of these indicators in transects of Bandar Kong and Bandar Bostaneh in Bandar Lengeh area was indicated that T. O. C and bottom sturdiness indices had no significant difference (p〉0. 05) and the whole of these transects had average priority. Bottom sturdiness, primary productions and macrobenthose communities indices had difference in Bandar Lengeh area (p〈0. 05) and these indices had average priority in Bandar Kong transect and had good priority in transects of Bandar Bostaneh and Bandar Hasineh. Ichthyoplankton community had average priority for Bandar Bostaneh transect, and had good priority for transects of Bandar Kong and Bandar Hasineh. The good priority has obtained for transects of Bandar Charak, Bandar Gorzeh and Bandar Chiroeyah. Also Macrobenthose community, primary production, water physical factors and bottom sturdiness were known as good, good, average and weakness priority respectively for transects of Bandar Charak, Bandar Gorzeh, but primary production, bottom sturdiness, water physical factors and macrobenthose community were resulted as average, good, good and average priority respectively for Bandar Chiroeyah transect . T. O. C index was determined as average priority for transects of Bandar Gorzeh and Bandar Chiroeyah and good priority for Bandar Charak transect. Finally, excluded areas maps, suitability areas maps and feasibility areas maps were drawn by Arc GIS software. In this survey, layers between 10 to 20 meters depth were recognized as the best position for installation of artificial reefs.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Artificial reef ; Macrobenthose communities ; Ichthyoplankton community ; Organic carbon ; Grain size ; Water physiccal indices ; Dissolved oxygen ; Temperature ; Chlorophyll a ; Algae ; Survey ; Ichthyoplankton
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 123pp.
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  • 6
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    Population dynamic of bony fishes in the southern part of the Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study was conducted to determine growth parameters, catch and fishing effort trends, stock assessment and Acceptable Biological Catch (ABC) of bony fishes in the Iranian coastal waters of Caspian Sea in the years 2010-2011 and 2011-2012. According to the result, the numbers of beach seines were 131 and 128 and their fishing efforts were observed 50184 and 42255 beach seining during 2010-11 and 2011-12, respectively. The catch per unit of effort CPUE) was calculated 182.9 and 205.6 kg/haul during two sampling periods, respectively. The total catches (including illegal fishing) were also obtained 16601.5 mt and 17034.1 mt during 2010-11 and 2011-12, respectively. The highest proportion of catch was belonged to kutum and golden grey mullet (86% and 88%, respectively) in two fishing seasons aforementioned above. Growth parameters of kutum were estimated as K=0.21/yr, L∞ = 60.0 cm, t0 = 0/yr. The Growth parameters were K=0.18/yr, L∞ = 61.1 cm, t0 = -0.14/yr for golden gray mullet and were K=0.12/yr, L∞ = 73.6 cm, t0 = 0.92/yr for common carp. Based on catch-at-age data, in the years 2010-2011 and 2011-2012, the total biomass, from the biomass-based cohort analysis were estimated 41700mt and 34400 mt for kutum and 14600 mt and 14400 mt for golden grey mullet, respectively. The reference points of F0.1 and F35% were 0.41/yr and 0.34/yr for kutum and 0.36/yr and 0.33/yr for golden grey mullet, respectively. Stock enhancement plays an important role in recovery of kutum stocks in the Iranian coastal waters of Caspian Sea. There is a significantly negative correlation between fingerlings released and condition factor (CF) and recruitment and CF. The different trends for fingerlings, recruitments and CF suggest that CF may be partly density-dependent, declining at high population sizes due to intra-specific competition. Therefore, more research should be conducted to determine the desirable level of artificial propagation. Food consumed by fish species, Rutilus frisii kutum, Rutilus rutilus caspicus, Cyprinus carpio, Liza auratus and Liza saliens were included Foraminifera, Porifera, Annelida, Mollusca, Arthropoda, filamentous algae, fish eggs and detritus.The results showed that Rutilusfrisii kutum generally feed on Balanus and Cerastorderma. The main food item for Cyprinuscarpio, Liza auratus and Liza salienswas detritus. Based on available models, the ABCs were estimated as 6600-7400 mt for kutum and 2200-2800 mt for golden grey mullet (with precautionary approach 6600 mt and 2200 mt for kutum and mullet, respectively) in 2011-12. Two species (kutum and golden grey mullet) are vulnerable to environmental factors, and these factors should be considered in the stock assessment and management of the fish. For two species, the ABC with a lower andmore accurate value based onmore information, should be selectedfor the implementation of a precautionary management approach.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Bony fishes ; Growth ; Mortality ; Biomass ; Acceptable biological catch ; Population ; Stock assessment ; Fishing ; Rutilus frisii kutum ; Rutilus rutilus caspicus ; Cyprinus carpio ; Liza auratus ; Algae ; Species
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 72pp.
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  • 7
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    Experiments on polyculture of pike, Esox lucius,with carps (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The Goal of project implementation was survey of biological roles of Northern pike, Esox lucius, in decreasing of Coarse fish and other un economics organisms in carps ponds and also increasing of final crops in hectare and determination of Suitable ration of pike in ponds. This project implemented by 5 treatment with 3 replicates for every ones in 2 years . The pike density was 200, 350, 500 and 650 fish individuals per hectare for 1 , 2 , 3 and 4 treatment , Respectively, and fifth treatment was without pike. The treatments of 1 and 3 conducted in first year and other in second year of test period. At first, about 26 brooders Caught from Anzali Lagoon, and reproduced by artificial and semi - natural methoods in Sefidroud Pisheries Research Station in 12–14 °c temperature. Produced larvae reared in earthen ponds and fries reached to weight of 10 -12 g after 45 days. Mean weight, length and survival rates of fish was 12.27 and 32.5 g , 11.44 and 15.83 cm , and 40 and 21% after 45 and 60 days , respectively . The carp density in ponds was 3500 fish individualsper hectar and stocking rates were 55 % silver carp, 20 % common carp , 10 % bighead carp and 15 % grass carp . In throughout of the experiment period, physico – chemical factors measured and plankton ( phyto and zoo) , benthos , un wanted fish and other organisms investigated . The biomass of unwanted fishes reduced to 76/81 and 60/6 % in first and second year of experiments respectively. The results showed that Esox lucius had effect in increasing of objective fish produce about 17.9 % and 3.9 % in first and second period of project implementation respectively . The average of fish produce in pond unit ( 2400 m2 )was 842 kg ( 3508 kg/ha ), 825 kg ( 3439 kg/ha ) and 776 kg ( 3232 kg/ha ) in first , second and control treatments first year of test period , and also in second year was 865 kg ( 3603 kg/ha ), 877 kg ( 3652 kg/ha) and 848 kg ( 3531 kg/ha) in second , fourth and control treatments , respectively . A significant different found in final weight mean of common carp between treatments and Control ponds (P 〈0/05), as the weight of common carp in treatments ponds was 220 % in first year and 191 % in second year more than control pond. In end of the trial, the mean weight of Esox lucius was 265 ± 74, 276 ± 104, 159 ± 33 and 265 ± 89 g in 1, 2, 3 and 4 treatment, respectively. Survival rate of Northern pike in 1 to 4 treatment was 43.8, 55.2, 40 and 35.6 %, respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Polyculture ; Pike ; Esox lucius ; Carp ; Survey ; Organisms ; Density ; Temperature ; Larvae ; Earthen ponds ; Plankton ; Survival rate
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 132pp.
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  • 8
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    The study of genetical differentiation of bisexual and parthenogenetic strains of Artemia urmiana by RAPD s method (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The brine shrimp Artemia consists of a number of bisexual species and a large number of parthenogenetic forms, which collectively, inhabiting a wide range of hypersaline habitats. This research was carried out in order to study the genetic differentiation of Artemia urmiana and two parthenogenetic populations originated from surrounding lagoons of the Lake Urmia (Fesendoz, Saray village) and also to find the phylogenetic relationships of some Iranian Artemia (Qom, Arak, Golestan, and Shiraz) with a comparison to some foreign Artemia species (A. sinica, A. franciscana, A. parthenogenetica (Russia and Turkmenistan) using a molecular technique (PCRRAPD`s). Of a total number of 56 random primers (10 bp) survey, 29 and 26 oligonucleotides showed polymorphic patterns with highly reproducible bands in Artemia urmiana groups and Iranian Artemia groups.The highest percentage of polymorphic loci were in Artemia urmiana (P= 78.89 %) and in comparison with the other parthenogenetic forms, in parthenogenetic Artemia from Saray village (P= 59.8 %). The highest values of Shannon index were estimated in Artemia urmiana (I= 0.41), and in comparison with other parthenogenetic forms, in parthenogenetic Artemia from Saray village (I= 0.3). Analysis of molecular variance indicated that most variation were within populations (A. urmiana with parthenogenetic forms, FST= 0.35) and among populations (Iranian Artemia with foreign species, FST= 0.76). Genetic pattern was not in accordance to geographical distribution, which indicated the wide range of Artemia samples at different regions in Iran. UPGMA showed two distinct clusters in group I including A. urmiana with two parthenogenetic forms and four clusters in group II including Iranian Artemia with some foreign species. It is understood that two parthenogenetic populations (Fesendoz and Saray village) had close genetic relationship together with high value of heterozygosity in parthenogenetic Artemia from Saray village. Iranian Artemia (Qom, Arak, and Golestan) indicated close genetic relationships with A. parthenogenetica (Russia and Turkmenistan) with low values of heterozygosity. A sister group was generated including Shiraz and USA Artemia samples which attests a possible contamination of local water with A. franciscana. FST value revealed high genetic structuring at all studied groups. Besides, it is suggested that gene flow was not strong enough to prevent substantial genetic differentiation. Result could lead to a management programmes to use suitable Artemia strains with high genetic diversity, for culturing and establishment of gene bank of Artemia stocks in Lake Urmia.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Artemia urmiana ; Parthenogenetic populations ; Iranian Artemia ; Phylogenetic relationships ; RAPD`s ; Shrimp ; Bisexual species ; Phylogenetic ; A. sinica ; A. franciscana ; A. parthenogenetica ; Survey ; A. urmiana
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 56pp.
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  • 9
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    The effectiveness of artificial reefs for rehabilitation and production of fisheries in Iran (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: An artificial Reef is a fabricated, underwater structure, typically built for promoting marine life in areas of generally featureless bottom. Creating artificial reefs began from 2000 in southern provinces in Iran. This study has surveyed about the Bushehr and Khozestan states. The objective is to determine the effectiveness of artificial reefs in attracting and enhancing the production different aquatics through increasing of fish assemblage and fishery. The performance of artificial reefs deployed off the coast of the Persian Gulf in 10 to 15m, was evaluated. The reefs comprised of seven artificial and one control (natural) statistical tests plan in three replicates. Three types of artificial reefs were used in this study. That two were designed reefs and one was not designed or used material. The experimental plan consisted (i) Reef ball (R), designed hemispherical shaped; (ii) Laneh Mahi (L), designed pyramid shaped; (iii) Used material (U); (iv) mixed (RL); (v) mixed (RU); (vi) mixed (LU); (vii) mixed (RLU); and (viii) control site (CS). Trap nets and under-water visual census surveys were adopted for seasonal sampling of fish aggregation. Results of statistical analysis using ANOVA and T-test of the mean Catch per Unit Effort (CPUE) showed significant difference (p〈0.05) in term of computing number of fish for aggregation of fishes. The study has concluded that reef deployments have influenced favorably the fish communities and fish harvests. Therefore, the artificial reefs, especially the mixed RLU, are appropriate tools for future fishing enhancement in the Persian Gulf of Iran.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Artificial reefs ; Fisheries ; Marine ; Survey ; Hemispherical ; ANOVA ; CPUE ; Underwater structure
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 188pp.
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  • 10
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    An investigation on feasibility of introduction of Tilapia to aquaculture industry of inland brackish waters at desert areas of Iran (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Use of underground inland water for fisheries aims is improved all over the world. Tilapia is the first candidate for brackish water fish culture and an economic fish based on its biological characteristics. Tilapia was entered to Iran for the first time in November 2008. Bafq area at the center of Iran was licensed by Environment Organization, because of closed underground water resources of the area. Studies showed desired growth and adaptation of Nile tilapia in brackish water earth ponds and fiber glass tanks with high survival and low FCR. Limnological factors were suitable for tilapia culture. All male samples were made using certain doses of methyl testosterone in defined period. Optimum level of protein, fat and energy were determined for the best growth and food performance of cultured tilapia. Environmental program was presented to prevent environmental problems. However, studied shoed tilapia culture had not negative effects in the area. Economical performance of tilapia culture project was desirable. Tilapia was successfully introduced to some private fish farms in June 2011. Tilapia culture may improve in center of Iran after environmental surveys.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Tilapia ; Aquaculture ; Monosex ; Feeding ; Environment
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 76pp.
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  • 11
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    Population genetic structure of silver pomfret, Pampus argenteus, in Persian Gulf and Oman Sea in Iran and Kuwait waters by using10 Microsatellite Markers (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The silver pomfret, Pampus argenteus, is distributed in Indo-western pacific ocean, especially in Persian Gulf and Oman sea, and although is widely commercially exploited, the genetics structure of this species is not clear completely. In the present study, the genetic diversity and population structure of Pampus argentus in the Persian Gulf and Oman Sea were investigated using microsatellite DNA markers. Genomic DNA from 125 specimens was extracted and PCR amplification performed. Seven loci with reasonable polymorphism were amplified. The results showed that average of observed heterozygosity was ranged from 0.54 while expected heterozygosity was 0.67. After applying the Hardy-Weinberg Equilibrium (HWE) test, some loci were found to be significantly deviated from HWE in some populations in which deficiency of heterozygotes was apparent. Population differentiation observed among all populations (P 0.01). The population differentiation (Fst) value between Kuwait and bushehr was the highest and significant (0.087) and between Chabahar and Bushehr (0.021) was the lowest and significant. Genetic distance analysis showed that the largest distance (0.269) was between Khuzestan and Chabahar and the smallest distance (0.075) was between Bushehr and Chabahar. The reported results could be of interest for management and conservation programmes of this species in the Persian Gulf and Oman Sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Population ; Genetic ; Structure ; Silver pomfret ; Pampus argenteus ; Microsatellite markers ; Species ; Diversity ; DNA ; PCR ; Heterozygosity ; Equilibrium
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 70pp.
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  • 12
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    The survey of feeding and reproduction of cetenophora Mnemiopsis leidyi in the southern of Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Menmiopsis leidyi was entered into Caspian Sea from Black Sea and mass population constitutes in the southern Caspian Sea. In this surveys, the relationship between length and wet weight measured and length and weight followed by this equation: n= 384, R^ 2=0.87 w= 0.003 L^ 9005 . The relationship of dry and wet weight calculated, in this surveys, the ratio of dry weight to wet weight was equal to 1.615% in 12 salinity. In vitro, the clearance rate at 12 and 27 C were 52.48 and 107.33 ml/h, respectively, daily ration at above temperatures were 1.98 and 16.65 respectively. Mnemiopsis leidyi can feed Acartia in accordance to 16.5 mg/1gbw (body weight) at 27 C in one day. The average digestive time in 12 C and 27 C were 77.50 min and 36 min respectively. The digestive value in 27 C was 2.5 fold than 12 C . The result indicated that clearance rate, daily ration and digest were increased in high temperature. Stomach content of Mnemiopsis leidyi was shown that this organism utilized from Acartia and Balanus, in addition, stomach content of kilka including two species of zooplankton from the southern Caspian Sea. Stomach contents of clupeonella cultiventris contain more than 54 percent of Acartia and its nauplii. This frequency observed in cluponella engrauliformis and clupeonella grimmi. On basis of zooplankton sampling in the sea, over 90 percentage of zooplankton populations contain Acartia.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Menmiopsis leidyi ; Zooplankton ; Population ; Survey ; Feeding ; Cetenophora
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 45pp.
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  • 13
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    Physico-chemical survey of balikhly Chi River from outlat of Yamchi dam (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Thise studies were conducted seasonaly in 9 sampling period 1n 1991 to assess the physico-chemical parameter status of water of Balikhly chie river (the region after yamchi dam) of Ardabil Provence in relation to its potential for aquaculture development. Water samples were collected by rutner sampler and analyzed for temperature, turbidity, conductivity, total hardness, chloride, COD, CO3 , HCO3,Ca, mg ,TSS ,PO4, NH4 ,NO2 ,NO3, SiO2, DO, SO4 . The water quality showed temporal and spatial variation in this study .The result revealed that the water were slightly alkaline with high total hardness and bicarbonate alkalinity which indicate high buffering capacity to pH changes .the ranged of dissolve oxygen concentration were beetwin7.6 to 13.7 mg/l with mean value of 10.98mg/l which were above the permissible oxygen cocentratio over all study site.the mean water temperature was 17.79 and ranged between 1.6 to 19.6 that is suitable for cold water fish culture while seasonal temperature variation showed that winter is desirable for hatcheries and other seasons for culture practices. Electrical conductivity value ranged between 873 to 1502 with mean of 1135 falls within the limits of suitable salinity ranges for rainbow trout culture. The turbidity and TSS ranged between 20-60FTU and 60168mg/l respectivelyThe levl of TSS concentration were little higer than80 ppm lmits..The values obtained for physicochemical parametersin Balikhly chie river were in conformity with recommended values for fresh water fish farming standared.The fish production potential based on water divertion and oxygen concentration over four study site from yamchi dam to downstream without applying any aeration systems were 38.6,27, 59 and 27 metric tons respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Lak yamchi ; Physic-chemical parameter of water ; Survey ; Sampling ; Turbidity ; Temperature ; Conductivity ; Hardness
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 52pp.
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  • 14
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    Determination of catchability bony-fish and optimized exploitation in the Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: To accomplish the stock assessment that pre-planned for bony-fish resources investigation started by considering two pivotal act. First gathering biometric data and second using catch statistics information for stock analyses. Implementing the research programmes five itinerant groups in Anzali, Keyashahr, Noshahar, Babolsar, Torkaman have been organized during fishing season. The biometric data were supplied in computer that distincted by each fish species and subdivided into age groups. In analyses the samples, Bertalanffy formula used for calculating average length and age, also for growth coefficient. Total mortality rate calculated by using Pauly formula, and the biomass status estimated through Cohort analysis. The catch by beach seiner cooperatives recorded 8630 metric tons, but estimation including. Poacher catch raised the harvest to 15.6 thousand tons. The total catch of Kutum reduced by 1400 tons compared with previous year, but the estimation revealed the biomass of Kutum 18.5 thousand tones, the stock stowed reduction in quantity relative to past years. Harvest exceeding the limit, fishing pressure. And employing higher fishing effort, combining releasing the Kutum seedling with shorter average length in recent years, leaded the shrinkage of biomass of Kutum resources. The Golden Grey mullet catch has been estimated 3437 metric tons, the figure showed 1500 tons increment, in comparison with previous year, nearly 24% of catch was shorter than Lm50% of this species. In Guilan province higher number of sub - size golden mullet captured, this development occured less in Mazandaran and Golestan province. Higher rate of exploitation, reduction of catch in recent years, dominating small size fish in catch composition indicated the population undergoing stress in ecosystem. Thin - lipped grey mullet only comprised 9.2% of the mullet catch - Length - structure of this fish species population formed mainly by young small size fish, the biomass of latter estimated 1100 metric tons. Catch further than maximum sustainable yield, by higher exploitation rate, and gradual diminishing of harvest, represented the resources of this fish species suffering both by high fishing pressure and un - sustainable effort, which ultimately declined the fishery of this fish species. Carp catch and its resources in Anzali region become very low, it is necessary to enhance the stock by Sea-ranching programmes. The carp resources in Gorgan region enjoy better status, but catch practices do not compatible with rule and regulation in Gorgan and Gomeyshan area. The standing stock of Gorgan carp estimated nearly 6000 tons. The information concerning carp resources indicate the stock experiencing pressure and likely the catch will diminish in future. The total catal catch of carp calculated 1900 tons. In recent years the Caspian roach resources are increasing but the bulk of harvest fished illegally and by gill - nets. The total catch of the roach during 1998-1999 estimated 1700 tons. Considering the semi - artificial propagation of roach in Golestan province, if has been concluded the multiplication of this fish species also should be planned by fisheries authorities for Anzali region. It is also advisable catching of this fish species to be regulated soon and selective catch are proposed. The catch of pike - perch during the year of 1997 - 98 jumped to 95 tons, but 90% of catch formed by young fish or sub – standard length size. Almost, all the increment of catch attributed to the releasing of millions of seedlings in the Sea which the plan has been implemented by Iranian Fisheries. Increasing the numbers of released seedlings, with higher average weight Identification of most suitable site for unloading the fries could ensure better survival rate and contribute the enhancement of resources and produce good catch for this desirable fish species. The total catch of Bream hit 18 tons, but most of the catch comprised by young fish with sub - standard size. The present formation of fisheries population of bream are the result of seedling releasing! In the Sea by Iranian Fisheries, since the catch of bream are negligible despite releasing programmes of seedling in a decade which 14million individuals until now, one could conclude the programmes do not contributed effectively to stock rehabilitation. The Caspian Barbus (Barbus brachycephalus) are at the threshold 01 vanishing, at present a few numbers are caught, therefore B.capito appeared in catch composition. The catch of latter species in recent two years are increasing. Total catch during the year of 1998 - 99 estimated 34.5 tons, biomass calculated 93 tons. Caspian vimba are small size fish which beach seiner (mesh size in bosom 30 millimeters) could not capture them ideally, bulk of the catch caught in illegal manner by gill nets. The total catch estimated 154 tons which the present fishing procedures surpassed total allowable catch (136 tons). In recent years the catch of this fish species are increasing. "Shemaya' similar in size with Vimba are caught less by beach seiner, illegal catch are considerable, the total catch in 1998 - 99 estimated 86 tons. The level of harvesting of this fish species are increasing in recent years and its population size become significant relative to last years. The main part of catch concerning Aspius fish species occured in Guilan coastal area, high fishing pressure reduced the population size, including low discharge of water in rivers during spawning period, impact negatively to reproduction. Catch statistic in 1989 showed 128 tons of this fish species are caught but in 1998 - 99 it has been reduced to 6.8 tons. It has been suggested artificial spawning could prevent its fate as endangering species. Caspian salmon catch estimated 78 tons during 1998 - 99, salmon population in Caspian Sea are supported by releasing reared smolts, which in recent years nearly 500 thousands fingerlings released in suitable rivers. After banning the gil nets application in Southern Caspian Sea, the catch of salmon in beach seining are increasing. It is necessary the released smolts in rivers being protected for its safe approach to Caspian Sea. The total catch of herring fish species in 1998 - 99 were nearly 700 tons. The bulk of the catch occur In Guilan fishing area, elimination of gill - nets usage in Southern Caspian Sea contributed the increment of herrings catch in beach seining. The herring resources in Caspian Sea reduced relative to past decades. The catch during 1913 – 1916 ranged between 130 - 160 thousand tons, in Caspian Sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Stock assessment ; Bony-fish ; Fishing ; Species ; Samples ; Growth ; Mortality rates ; Biomass ; Kutum ; Carp ; Survival rate ; Barbus brachycephalus ; B.capito ; Population
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 136pp.
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  • 15
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    Identification and density determination of ichthyoplankton (fish larvae) in west and east of Khure Mussa channel (2018)
    Iranian Fisheries Science Research Institute | Khorramshar, Iran
    Details
    Publication Date: 2021-05-19
    Description: The study of fish larvae population in east and west coasts of Khure Mussa channel in Khouzestan province (Persian Gulf) was carried out. ..
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ichthyoplankton ; Density ; Fish ; Population
    Repository Name: AquaDocs
    Type: Report , Not Known
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  • 16
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    Statistical and biological survey of the Persian Gulf Fish (shrimp trawl fishing) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Statistical ; Biological ; Survey ; Shrimp trawl fishing
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 78pp.
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  • 17
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    Population genetic study on two commercial shrimp species and determining of DNA-Barcoding of 6 – 8 species by partial sequencing of mtDNA using molecular method (PCR-Sequencing) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Barcodes are short segments of DNA that can be used to uniquely identify an unknown specimen to species, particularly when diagnostic morphological features are absent. These sequences could offer a new forensic tool in plant and animal conservation especially for endangered species. Ideally, barcodes could be used to positively identify illegally obtained material even in cases where diagnostic features have been purposefully removed or to release confiscated organisms into the proper breeding population. In the present study molecular data were used besides the morphological ones to introduce a specific barcode for six selected species of Shrimp. Based on the previous phylogenetics study, it has been proved that the mitochondrial COI gene in crustacean is a good discriminative marker at both inter- and intra-specific levels. In this regard, six species of shrimp (Fenoro penaeus indicus, Fenoro penaeus merguensis, penaeus semisulcatus, Metapenaeus affinis, Marsupenaeus japonicas, Fenoro penaeus penicillatus were collected from the Persian Gulf and Oman sea. After identification, the total DNA was extracted; COI gene was first amplified and then sequenced for each species. Finally the collected data were analyzed with the specific phylogenetic software. Molecular analysis revealed some degree of interpopulation differences but six good species were recognizable based on COI sequences. Also for population study molecular data of two species Penaeus semisulcatus and Metapenaeus affinis were analysed base on COI RFLP and 16SrRNA sequences respectively. The results would be helpful to protect shrimp species.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial ; Morphological ; Population ; Genetic ; Shrimp ; Species ; DNA barcoding ; Partial sequencing ; mtDNA ; Molecular method ; PCR ; Fenoro penaeus indicus ; Fenoro penaeus merguensis ; Penaeus Semisulcatus ; Metapenaeus affinis ; Marsupenaeus japonicas ; Fenoro penaeus penicillatus
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 74pp.
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  • 18
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    Survey of potential adaptation (Ion- Osmotic) Rainbow trout (Oncorhynchus mykiss) fingerling with Caspian sea water (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study aimed to determine domain the adaptability of rainbow trout(Oncorhynchus mykiss) fingerlings in fresh water up to 20 per thousand (grams per liter) for providing facilities for growing this valuable species in the aquatic environment with salinity unconventional been completed. For this purpose the biochemical, bloody and physiologic parameters rainbow trout were studied to determine the adjustment range .Fingerlings fishes from cold water fish farm in the province Mazandran were prepared and for experiments were transferred to the Ecological Institute of Caspian Sea . Fingerlings with an average weight 31.56 ± 0. 07 SE g and average fork length 13.80 ± 0.15 SE cm, in 3 treatments in water with salinities (fresh, 13 and 20 grams per thousand) with a density of 15 numbers in polyethylene to 300-liter tank containing the 250 liters of water testing were introduced.Fresh water from Tajan rivers and water psu13 from the water Caspian Sea and water psu20 by mixing water the Caspian Sea and Sea salt was prepared . The daily amount to 50 percent of the of water tankss been replaced .During the experimental period was for 7 days and were not fed during the experiment.The water parameters was measured during the experiment included 6 ppm dissolved oxygen, pH equal to 8.2 and temperature 15.5 ° C . In the experimental period were not observed Losses in the experimental groups . The results showed that fish gill and kidney introduced in different salinities by making appropriate changes in chloride cells in the gills through increasing the number and the volume of these cells at the base of secondary blades and tubules in the kidney tubules to create greater interior space, are adapted to By changing salinity.Relatively parameters osmolarity, sodium, chloride, magnesium, cortisol, calcium, hematocrit, hemoglobin,number of red blood and white cells in water saltier than freshwater environment was higher (0.05〈 p, Duncan). Changes in hematological and blood plasma ionic parameters and vital organs Fingerlings indicates a willingness adaptability and the ability physiological adaptation fingerling was consistent with changes to environmental salinity brackish water .So, the factors measured with increasing salinity the uptrend that the range of variation for the osmolarite 449-281 mOsmol kg, for sodium, chloride, magnesium, cortisol, respectively, 211- 151, 165121, 3 / 3 7/0, 87. 53 mmol and the calcium 22-13 mg per dL.The measured values for hematocrit 32.2- 38.8%, hemoglobin 6.2 - 8.6 g per deciliter and the red and white blood cells, was respectively, 1.2-1.7×106 and the 15.6 -18.9×103.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Adaptation ; Rainbow trout ; Gills ; Kidney ; Survey ; Oncorhynchus mykiss ; Fingerlings
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 42pp.
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  • 19
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    A survey on phytoplankton, zooplankton and Ichthyoplankton in shrimp habitat in Hormozgan Province (Khamir, Laft, Tiab and Yekshabeh) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The research was carried out to investigate phytoplankton, zooplankton and Ichthyoplankton of Khamir, Laft in the western parts of Hormozgan Province and Tiab, Yekshabeh in the eastern parts of it for one year from March 2015 to November 2016. The aim of the study was to achieve seasonal changes of phytoplankton, zooplankton and Ichthyoplankton and compare them among estuaries. In order to achieve this goal, four stations were determined and seasonally sampled. Phytoplankton was taken 2 liter by bottle from 0.5 m below water surface, Zooplankton sampling was done by using standard plankton net with 55 micron mesh size that well equipped with flow meter by horizontal pulling and Bongo Net with 300 micron mesh size used for Ichthyoplankton sampling. During the study, 80 species of phytoplankton were identified, including 53 species, 24 species Dinophyceae, Cyanophycea 2 species and 1 species belonging to Dictyochophyceae. East and West estuaries had the 63% similar percentage of phytoplankton and results showed that 54 Bacillariophyceae genus were common in two regions. The Tiab estuary showed an average 21524±5903 cells/L of phytoplankton high density. Zooplankton was identified with eight phylum. The study of seasonal variations showed that in all seasons crustacean had higher density than other groups. Four copepods orders were identified which the calanoid had higher density and distribution in compare to others. 19 families of the larvae were identified and 69/99% similarity was also observed between estuaries of two region. Glupeidae, Gobiidae, Engraulidae and Scianidae families were abundant than other families. Shannon-Wiener, Maraglef and Evenness biological indices were found higher in west than the East estuaries. The results showed values were the highest in laft estuary, respectively H'= 3/22, d=7/11 and J'=0/72. The lowest biological indices in Tiab estuary, respectively H'= 2/233, d= 4/109 and J'= 0/597. The estuaries in the West had more diversity and eveness. The highest and lowest of biological indices were obtained (d= 5/948 and H= 2/759) and (d=2/825, H=0/830 and J=0/249) in the winter and summer, respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Plankton ; Phytoplankton ; Zooplankton ; Icgthyoplankton ; Estuaries ; Survey
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 92pp.
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  • 20
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    Molecular Population Genetic of Persian Sturgeon (Acipencer persicus) and Stellate Sturgeon (Acipencer stellatus) using Microsatellite markers (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The fishery stocks of most commercial aquatic stocks in the world have shown declining trends in the past two decades. Several factors have been responsible for the decline of stocks the most important of which over fishing and over-exploitation, pollution, loss of natural habitats and natural spawning grounds, construction of dams and bridges across the important rivers which restrict the migratory routes of spawners, decrease in natural reproduction and rehabilitation of stocks through artificial breeding programs. Over-exploitation of stocks and pollution directly affect decreasing stocks in an ecosystem. Not differentiating between different populations and stocks of a species found distributed in an aquatic ecosystem is considered one of the main factors which causes the depletion of stocks in most ecosystems in the world. In most cases this is because genetic variations in aquatic stocks in the wild are not taken into consideration. Six species of sturgeons are found living in the Caspian Sea and its drainage basin which produce more than 85-90% of the world caviar. The Persian sturgeon (Acipenser persicus) and the stellate sturgeon (Acipenser stellatus) are the main sturgeon species of the Caspian Sea. The Persian sturgeon is mainly found in the south Caspian Sea while the stellate sturgeon stocks are considered shared stocks by the five Caspian littoral states. Due to over fishing in the past two decades the legal catch figures for sturgeon stocks in the Caspian Sea dropped from 28500 tons in 1985 to less than 1500 tons in 2004. Similarly caviar production also dropped from 3000 tons to 110 tons in 2005. With regard to the severe reduction in sturgeon stocks it is necessary to take essential steps before these valuable species are totally wiped out. The fisheries management of the five Caspian littoral states should focus their efforts on identifying the different populations and stocks found in the Caspian Sea. Concerted measures should be taken to study the distribution and biomass of the different populations in order to develop a scientific solution for the sustainable use of these endangered species and to secure the long term conservation of sturgeon stocks. The aim of present study was to evaluate the genetic structure of the population of two species Acipenser persicus and Acipenser stellatus and to develop molecular markers to identify and differentiate different populations of these two species.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial ; Population ; Genetic ; Persian Sturgeon ; Acipencer persicus ; Stellate Sturgeon ; Acipencer stellatus ; Microsatellite markers ; Fishery ; Pollution ; Spawning ; Species ; Aquatic Ecosystem ; Genetic ; Molecular
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 70pp.
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  • 21
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    A survey on the effect of Cochlodinium sp. bloom on shrimp culture complexes and hatcheries activities in Bushehr Province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The aims of this project was to inform and aware about the red tide condition before entering the algal bloomer in water resources to the hatcheries and farmed shrimp complexes in Bushehr province coastal. Field investigation and sampling have been carried out in the southern of the input water channels of Mond, Delvar and Helleh farmed shrimp complexes, which are located along the coastal of Bushehr Province, from April to December 2011 .The physic-chemical parameters such as pH, salinity and water temperature and also meteorological conditions were measured and recorded on the field. The water sampling has been lunched for determination of nutrients and chlorophyll - a, phyto- and zoo- planktons. No Cochlodinium.sp outbreaks have been detected in the studied area, during the study. The only bloom which reported by a fisherman, was outbreak in offshore of Bushehr province in Khoure Khan on 13th September 2011. The sample which transferred to the Iranian National Shrimp Research Institute was included Alexandrium.sp and its density was 2 million cells per liter. The identified phytoplanktons were belonged to three order of Bacillariophyceae (52.6%) with average density of 10778 cells per liter, Dinophyceae (37.7%) with density of 7731 cells per liter and Cyanophyceae (9.7%) with density of 1980 cells. 12 genera belonged to Dinophyceae , 25 genera of Bacillariophyceae and two genera of Cyanophyceae were observed during the study. The highest density of phytoplankton was recorded in Helleh station by 18374 cells per liter. The maximum density of phytoplankton was at Delvar station by 141120 cells per liter in December. The highest density of the phytoplanktons was belonged to Dinophyceae by 126000 by cells per liter of which the Alexandrium.sp had the density of 124500 cells per liter in August 2011. From the Dinophyceae the Alexandrium.sp with mean density of 20345 cells per liter, Ornithocercus 920 cells and Prorocentrum.sp 820 cells were the predominant species. The identified Zooplankton in were belonged to 8 branches and 19 groups. The highest density of zooplankton was recorded in Helleh station by 1194 no. per liter. Nauplii were the dominant zooplankton groups with an average density of 136.4 no. per liter, Tintinnids 98.7, Cyclopoida 60.8, Calanoida 35.7 and Harpacticoids 14.5 no. per liter . The average of water and air temperature was recorded 29.4 °C and 28.3 °C, respectively. Average of salinity was 41.2 and pH was 8.46. The average of depth in all stations was 5.7 m. The mean concentrations of silicate, nitrate, nitrite, ammonia and total phosphate were 1.99, 0.03, 0.009, 0.14 0.15 ppm, respectively and the average of chlorophyll - a was 0.94 mg.m-3.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physico-chemical ; Cochlodinium.sp ; Shrimp Culture ; Bloom ; Survey ; Hatcheries ; Sampling ; pH ; Salinity ; Temperature ; Chlorophyll a ; Phytoplankton ; Zooplankton ; Alexandrium.sp ; Bacillariophyceae ; Dinophyceae
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 79pp.
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  • 22
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    Survey on health status in aquaculture Sturgeons Centers( Mazandaran, Guilan And Golestan Provinces) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Study of survey health management and diseases in hatcheries and fish farms can help us to knowledge and application control methods such as: prevention, treatment and increase high levels of production in hatchery and farms, finally. This survey carried out from 2005 to 2008 for 4 years in sturgeon hatcheries and farms of Golestan province. Sturgeon fishes include Huso Huso, Ship sturgeon, Acipenser persicus collected and for virology, bacteriology, fungius and hematology examined. Also, physicochemical parameters measured and recorded in different stages of culture. Results of this study showed that all of samples in virology was negative and did not observe any doubetful causes. In bacteriology CFU was variation from 3/9 ×105 to 6/9×10. The most parasites that detected in this survey was Cocolanus espherolanus , Sceria binopsulus semiarmatus and Amphilina fuliacea that separates from Acipenser Percicus, especially. The results about hematology parameters some important hematological indices of ship sturgeon include: The total RBC for female and mail specimens measured as 5.3±1.5 ×105, 4.8±0.5 ×105 per mm 3 respectively. The amount of haematocrit and hemoglobin for female and mail determined: 34.3±2.8, 35±1.4 percent and 10.3±0.9, 8.9±0.8 gr/dl .The MCV: 216.3± 96.2, 736.5± 102.5, MCH: 720.2±309.5, 186±0.7 and MCHC: 30±0.8, 25.5±3.4 percent respectively.The total WBC were (female, male): 21320±1054, 20580±777 per mm 3 and neutrophil: 16.4±2.5, 17±1.4 percent and lymphocyte: 74.4±2.4, 73.5± 0.7 percent and eosinophil: 6±1.4, 6.4±0.5 percent, monocyte: 2.8±0.8, 3.5±0.7 percent. There was not any significant differences (p〉0.05) between mentioned parameters in male and female (students t-test). Also evaluation of hematological parameters in bluga ( Huso huso) include: total RBC were (male , female) 5±0.3 ×105 , 4.9±0.6 ×105 per mm 3 ,respectively and hematocrit: 33.2±6.7 , 35.4±3.4 percent and hemoglobin: 11.2±1.5 , 12.2±1gr/dl and MCV: 669.9±172.2, 723.9±982.4 and MCH: 226.2±42.5, 249.5±35.4 and MCHC: 34.1±2.4, 34.6±3.6 percent respectively. The totals WBC were (male, female): 24800±707.1, 23042±1375.4 per mm 3 and neutrophil: 18.5±0.7, 21.4±1.1 percent and lymphocyte: 73.5±1.4, 68.4±1.1 percent and eosinophil: 5±2.8, 7±1.2 percent and monocyte: 3.5±3.5, 3.2±0.8 percent. According to statistically study the count of lymphocyte had significant difference between male and female fish and this count in male was higher than female. (p≥0.05).
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physicochemical ; Hematology ; Fish ; Sturgeon ; Huso huso ; Ship ; Acipenser percicus ; Bacteriology ; Parasitology ; Health management ; Diseases ; Survey ; Aquaculture ; Hatcheries ; Samples ; Sceria binopsulus ; Amphilina fuliacea ; Female ; Male
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 395pp.
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  • 23
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    A survey on Black mouth Croaker (Atrobucca nibe) resources in the north-west of Oman Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Blackmouth croackers (Atrobucca nibe) resources are the most important commercial stocks in the north-west of Oman Sea, exploited as lantern fisheries by catch with trawlers vessel. At least 50 specimens were sampled monthly from September 2012 to July 2014. Results showed blackmouth croacker have several small peak in gonado-somatic index, but the most frequency of adults occurred in May. The female: male ratio was calculated 1:0.8 and the LM50 was estimated at 35 cm. The mean of absolute and relative fecundity were estimated 92988 and 223 respectively. LM50 and LC50 were calculated and the results showed this species mainly caught before length of maturity, and the mass populations have not sufficient opportunity to reproduction. The mean of egg diameter for black mouth croaker were calculated at 533±103. Linear model of Fecundity= 9597.6TL-233880 was calculated for length-fecundity relationship . Results of feeding showed lantern fishes (65%), shrimps (11%), Japanese threadfin bream (13%) and the other fishes (11%) were the main feeding regime of black mouth croaker. This species was carnivore, the food prefect mainly consisted of lantern fishes (57.7%) and shrimps (28.2%). The vacuity index (87.7 %) indicated this spices was low appetite fish. Total length range was 18 to 47.5 cm with mean length of 28.7 cm, and the class of 23-24 cm was the most frequent length in fishing ground. The length-weight relationships in A. nibe were calculated for female and male W= 0.0121L2.9385 and W= 0.0075L3.0737 respectively, both have isometric growth. Growth parameters of L∞ and K were estimated 50 cm and 0.2 y-1 respectively. Parameters of t0, Tmax and Ǿ were calculated -0.7 year, 14 year and 2.69 respectively. This species have two recruitment period, and the peak of recruitment was occurred in May with 23.14 percent. Total mortality , natural mortality and fishing mortality rates were calculated 0.53 y-1, 0.46 y-1 and 0.07 y-1 respectively. Due to the calculated exploitation rate (0.13), it is appreciated the improvement of black-mouth croaker in the Oman Sea. Base on seasonal and monthly CPUE it was resulted the peak of fishing density were occurred in the winter. Results showed the main distribution of black-mouth croaker concentrated on the continental slope in 200 m depth, but these stocks move to deeper waters ( more than 200m) in warm season and extend to shallow waters (less than 200m) in winter.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Atrobucca nibe ; Reproduction ; Feeding ; Growth Parameters ; Mortality rates ; Exploitation rate ; Distribution ; Survey ; Black mouth Croaker
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 87pp.
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  • 24
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    Evaluation Silo (Cylindrical) fish tanks as an applicable method for aquaculture of Rainbow trout (Oncorhynchus mykiss) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This investigation conducted for evaluation Silo (Cylindrical) Fish Tanks as an applicable method for aquaculture of Rainbow trout (Oncorhynchus mykiss). Current research was designed in two practical phases as accidental experiments through 3 treatments and repeats of which stocked by three Rainbow trout (375 gr) densities as 75, 100 and 125 fish/m3 in 9 silo fish tanks (2 m3). For better understandings of the silo performance method, concrete circular fish tanks (similar volume) considered as controls and stocked as similar fish densities as silo tanks. The duration of the first phase of experiment was 150 days. The second phase of the experiment was determined for evaluating two proposed silo type (Inlet and outlet in bottom side / Inlet from bottom and outlet in upper side). In this stage, proposed silos (stocked by fish of 294 gr weigh) tested for rearing trout for 30 days. Water supplied from two surface wells after some aeration operations. Stocked fish were fed by pellets made by Fish Feed Chineh Company (Ltd) in Iran. Feeding operation conducted according to the recognized manuals by consideration of water temperature, fish weight and biomass. Meanwhile, biometry operation conducted in 10 days intervals while fish were anaesthetized. In addition, water quality was determined by daily measurements. According to the results of the first phase of experiment, there were significant variations on Growth rate, survival rate, FCR, FCE and SGR through the cultured organisms in silo tanks compared to the circular tanks. Meanwhile, according the results of an economic study on this survey, the fish culture in silo tanks showed significant economical and profitable in compare to controls. In additions, the second phase of experiment showed better aeration conditions in silo tanks when inlet water supply from bottom side and outlet located in upper side. Because of the fine distribution of fish in silo tanks and more usage of depth by this method, fish culture would be an applicable and profitable technique in narrow lands and slopes through the mountains area. The maximum stocking rate recorded more than 100 Kg fish/m3 in silo tanks.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Practical ; Silo ; Cylindrical ; Aquaculture ; Rainbow trout ; Oncorhynchus mykiss ; Fish ; Feeding ; Temperature ; Weight ; Biomass ; FCR ; FCE ; SGR ; Culture
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 73pp.
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  • 25
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    Population Genetic Structure of Neogobius caspius (Eichwald ,1831) in the east and central of the South Caspian Sea using Microsatellite Markers (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Neogobius caspius is a small benthic fish that is native to the Caspian Sea. The importance of this fish is because of it is role as a main food resource of the Sturgeon fish. The genetic diversity of N.caspius populations in the Caspian Sea was studied using microsatellite technique. In the study 95 Samples of Neogobius caspius from two regions (torkman port and Chalus) in south Caspian Sea were collected. DNA was extracted using 12 pairs of microstellite primers polymerase chain Reaction (PCR) was conducted. DNA Bands were analyzed using uvdoct and GenAlEx software package. Out of 12 microsatellite primers, 11 loci were produced, in which 5 of them were polymorphic ,6 monomorph and one of them showed smear. Average of observed and expected hetrozygosity was 0/798 and 0/843 respectively. Significant genetic differences between 2 regions was observed (P 0/01). Deviations from hardy- Weinberg equilibrium were in all cases. These results indicate that at least, 2 population of Neogobius caspius exist in the south Caspian sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Microsatellite ; Genetic ; Population ; Neogobius caspius ; Benthic ; Native ; Sturgeon ; Diversity ; Samples ; PCR
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 22pp.
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  • 26
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    Study of Kutum (Rutilus frisii kutum) population using mtDNA with PCR (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Study of Mahisefid population using mtDNA with PCR Mahisefid diversity was studied in four rivers including Lamir, Sefidrood, Shirrood and Tajan. Total sample was collected from four rivers when fish migrat to river for spawning, 100 samples from Sefidrood, 98 samples from Lamir, 48 samples from Shirrood and 48 samples from Tajan. DNA was extracted with phenolcholorophorm. Samples were used for RFLP, the PCR product were digested by 20 restriction enzymes as follow: TasI, HaeIII, HinfI, HincII, SalI, DraI, AccI, AvaII, XhaI, BshNI, AvaI, BclI, BshII, MspI, PstI, RsaI, SdnI, TaqI, TruI, VspI. The four restriction enzymes including: TasI, HaeIII, HinfI, HincII showed diversity, 6 enzyme didn t have any restriction and 14 enzyme showed monomorphic. Total 20 haplotype studied that haplotype AAAA and BAAA had most frequency. The average haplotype frequency of AAAA was 29.93% and the average haplotype frequency of BAAA was 27.55%. 2- Study of population of Mahisefid with microsatellite markers 120 specimens of R.frissi kutum were used from four rivers to test thirty primers (30 samples from each river) of which 8 primers showed polymorphism. A large variation in heterozygosity average over all samples was observed among loci, that ranged from 0.13 to 0.91. For a given locus, observed heterozygosity varied greatly among the samples. For example, in Lamir 0.07 at SPY5 and 1 in Sefid Rud at CA1. Tajan had an observed heterozygosity of only 0.17, whilst the Lamir had an observed heterozygosity of 0.07 at locus SPY5. At locus SPY4, Tajan and Sefid Rud are the same and (0.53) and Shir Rud is 0.83 and Lamir is 0.47. However, despite these differences, there was clear difference in average heterozygosity observed between the samples. To investigated of Hardy-Weinberg Equilibrium in all locus and all rivers deviate showed from Hardy-Weinberg Equilibrium was significantly different ( P〈0.01)except in SPY6 locus. The maximum average Ho was 0.91 in locus CA1 and minimum was 0.13 in locus SYP5 and maximum average of He was 0.89 in locus SYP4 and minimum was 0.28 in locus SYP6. Highest Ho was 1 in locus CA1 in Sefid Rud River and lowest was 0.07 in locus SYP5 in Lamir River , highest He was 0.92 in locus SYP4 in Shir Rud River and lowest was 0.24 in locus SYP6 in Tajan River. According to Nei (1978) the highest genetic distance was between Shir Rud River and Tajan River (0.07) and lowest genetic distance was between Sefid Rud River and Tajan River (0.05). The highest genetic similarity was between Sefid Rud River and Tajan River (0.95) and the lowest genetic similarity was between Shir Rud River and Tajan River (0.93). FST was significantly different (P 〉 0.05) between all samples except Lamir River and Sefid Rud River. The highest Fis was in Lamir River (0.84) in locus SPY5 and in Sefid Rud River in locus SPY5 (0.71), in locus CA12 (0.67) in Shir Rud River and SPY5 (0.63) in Tajan River. The lowest Fis is in locus CA1 (-0.55) in Sefid Rud River, in locus CA1 (-0.47) in Tajan River, in locus CA1 (-0.28) in Lamir River and in locus SPY6 (0.16) in Shir Rud River.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Rutilus frisii kutum ; Population ; mtDNA ; PCR ; Diversity ; Sample ; Migrate ; Phenolcholorophorm ; R.frissi kutum ; Equilibrium
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 70pp.
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  • 27
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    Survey of water quality control of floating engine (Ferdos 1) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Water quality ; Control ; Floating engine ; Ferdos 1
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 75pp.
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  • 28
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    Investigation of production possibility of monosex female and sterile fish in Rainbow trout Oncorhynchus mykiss (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This investigation carried out for the first time in Iran inorder to prodcution of monosex female and also sterilization in Rainbow trout. In this study, the eggs of general females were fertilized with the sperm of sex reversed male and so monosex female population was produced in second generation and sterilization carried out with oral administration of 17α methy 1 testosterone and immenrsion and oral administiration methods were used in embryonic stage and from commencing of acitve feeding of larvae, respectiverly. For sex reversal , 13 treatments were considered totally, that the most percentage of male (100%) was observedc in a treatment including of orally administration of 0.5 ppm hormone for 60 days after commencing active feeding (P〈0.001). In the other treamtnet, different percentages of sex ratio including male, female, intersex and sterility were observed. The offspring of genral eggs fertilization with the sperm of masculinized fish were 100% female, chisquare test was shown the treatment of orally administration of 30 ppm hormone for 120 days after commencing active feeding that had been considered for sterilization, was produced 90% sterile fish (P〈0.001) and was changed the sex ratio significancthy. Morphological changes of the gonads and sperm ducts in matured fish and also histological changes in the gonads of fish in the treamtints were considerable.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Morphological ; Histological ; Monosex ; Female ; Male ; Sterilization ; Rainbow trout ; Eggs ; Fertilized ; Sperm ; Population ; Sex ; Fish ; Oncorhynchus mykiss ; Rainbow trout
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 58pp.
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  • 29
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    Evaluation of restocking program in north Alborz (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Gillan , Mazandaran and Gorgan provinces have temperate climate, thus they have more potential for aquatic animal culture. There are thousands hectare of lands for Aquaculure and fisheries in adjacent to Caspian Sea in this provinces. these areas(North alborz) have provided a favorable back ground for aquatic animal breeding and stock enhancement of species in the sea. As a result, this investigation executed during two stages (phases). At first stage, the goal of this project included the feasibility study and demonstrating the existing situation of fish stock enhancement activities in North Alborz area and second phase is to survey on distribution, and production activities of stock enhancing hatcheries as well as their constructions,and production time table. Survey was started frome 2006 to 2008 by using qestionaries in 7 hatcheries from tree provinces.results revieled that there are more than 10 species was subjected to restocking .Total releasing was about 300 millions of fry and finger lings in to the Caspian sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Stock Enhancement ; Broodstock ; Production ; Yield ; Artificial propagation ; Bony fishes ; Sturgeon fishes ; Restocking ; Aquatic ; Culture ; Aquaculure ; Fisheries ; Breeding ; Survey ; Hatcheries ; Fry ; Fingerlings
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 191pp.
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  • 30
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    Active analysis of condition of feed and feeding in Iranian sturegeon fish larvae (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In the first chapter, all documents in aquaculture feed, feed formulation, nutritional requirement and basic concepts of aquatic feeding had been collected. The second chapter focused on broodstock feeding in order to improve reproduction effecieny . The third chapter performed to importance of live food specially in sturgeon fishes larvae and the forth chapter attended to biology and ecology of this fishes and finally in the fifth chaper, special nutrition and feeding in sturgeon fish larvae had been brought with all the works out in Iran on. There are 63 documents including papers, thesis and reports from different research library and universities among them 34 base on sturgeon larvae nutrition specially on Huso huso and Persian sturgeon species and almost there are not any documents on the other three species. 14 documents comes from the role of protein, energy and lipid replacements basically in the first growth year, 3 of back to the special nutrition requirement of Persian and Huso huso species and 12 were on digestive enzymes physiology, the role of probiotic and prebiotic on growth and survival rate. Almost there is not any organization in Iran to work on this species specificly and it seems every student and researcher paid attend to a narrow way of high way sturgeon fish researches. There is not any data bank on these important fishes and some repeated worked out by researchers in different parts of the country. Beside of this documents there had been gathered some research documents from the other countires for comparing and showing the correct way in this regards. First, we must focus on broodstock sturgeon feeding, then on egg and yolk analysis, larval stages, morphology, measurement of larval mouth and finding the best live food for different stages of sturgeon larviculture and finnaly on digestive physiology and enzymatic activities. In the stage of shifting from endogenous to exogenous feeding, nutritional requirement, protein digestibility, essential and free amino acids, essential fatty acids spcially PUFA and HUFA, vitamins, minerals, pigments, growth and survival stimulants and resistance to physiological environmental stress are very important to search.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Sturgeon fishes ; Nutrition ; Feeding ; Biological stages ; Feed ; Larvae
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 256pp.
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  • 31
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    Monitoring of use possibility of edible films ( whey protein, sodium alginate and mix of them) for cleaned Kilka packaging (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This project was carried out in order to increasing of nutritional value, taste and shelf life of cleaned Kilka Fish during cooled storage. Edible films made by Whey protein and Sodium alginate were used for fish packaging. This search carried out in two stages consisting of pre- study and study. 3, 6, 9 and 12% concentrations of Wp and 0.5, 1, 1.5 and 2% concentrations of SA at three times including 0, 2 and 4 hours were used in pre-study stage. The covered samples were kept in -18 ֯C. Microbial and sensory examination were carried out for a period of two months. Microbial factors were including total bacterial count, Staphylococcus bacteria count, Coliform, Escherichia coli and Pseudomonas bacteria. Sensory tests consist of taste, odor, color and tissue were studied in the fish samples. 12% and 0.5 % concentrations at time = 0 of edible films made by WP and SA considered in study stage. This is can be due to the significant differences in total acceptance index of sensory tests. Control sample cleaned Kilka was packaged in disposable dishes with cellophane covers in 500gr in weight. Two selected timar and mixed cover including 12 % and 0.5 % concentrations at time = 0 of edible films by WP and SA considered in study stage. The covered samples were kept in -18 ֯C. Microbial, chemical and sensory examination were carried out for a period of six months. These factors and chemical factors consisting of humidity, protein, lipid, ash, calorie, Peroxide value, free fatty acids, thiobarbitoric acid, TVN and pH were studied in test samples compared with the control samples. Coliform, Escherichia coli and Pseudomonas bacteria contamination were negative until the end of storage period in the covered samples. The mean total bacterial count and Staphylococcus bacteria counts in processed samples by WP were 2.47 and 1.61 logcfu/g, in processed samples by SA were 2.84 and 1.28 logcfu/g, in processed samples by WPSA were 2.51 and 1.44 logcfu/g, and in control samples 4.11 and 2.93 logcfu/g from 1 day until six months after processing, respectively. The mean of moisture, peroxide value, TVN, pH, free fatty acids, thiobarbitouric acid , protein, fat, ash and calorie in the covered samples by WP were 73.91%, 0.13 meq/kgoil, 9.84mg/100g, 6.15, 1.15gr/100, 0/006 mg/kg, 19.00%, 4.25%, 2.1% and 120.73 kcal/kg, in the covered samples by SA were 73.91%, 0.06 meq/kgoil, 9.84mg/100g, 6.15, 1.15gr/100, 0/006 mg/kg, 18.85%, 4.72 %, 1.90 % and 125.98 kcal/kg, in the covered samples by WPSA were 73.91%, 0.06 meq/kgoil, 9.84mg/100g, 6.15, 1.15gr/100, 0/006 mg/kg, 18.50 %, 4. 65 %, 2.25 % and 126.48 kcal/kg and in control samples 59.43%, 3.25 meq/kgoil, 16.22mg/100gr, 6.71, 9.21gr/100, 0/15mg/kg, 18.2%, 4.00%, 1.80% and 107.10 kcal/kg, respectively. No statistically significant differences were observed in the results of chemical experiments of the covered samples and presence of the meaningful difference at the results of the chemical experiments of the control sample, The covered samples by WP, SA and WPSA up to the end of storage period at cold-room had a favorite quality but the control samples had lost their. No statistically significant differences were observed in the WP samples compared with the WPSA samples (p〉 0.05). Samples covered by SA had better quality compared with other samples which can be due to the presence of the significant difference in total acceptance index among covered samples without considering of economical worth.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Nutritional ; Chemical ; Economical ; Edible films ; Kilka packaging ; Quality evaluation ; Cooled storage keeping ; Chemical analysis ; Protein ; Sodium ; Samples ; Bacterial ; Protein ; Lipid ; Fatty acids ; Escherichia coli ; Pseudomonas bacteria ; pH
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 109pp.
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  • 32
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    The Creation of genetic basic population of Rainbow trout((Onchorhynchus mykiss) based on Study of genetic variation in brood stocks using microsatellite (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In order to perform the project, 446 samples of rainbow trout (Onchorhynchus mykiss) from 24 different regions in Iran were collected. About 2-3 g of caudal fin samples was collected from each specimen and preserved in absolute ethyl alcohol and then transferred to the genetic laboratory. Genomic DNA was extracted using the phenol-chloroform method and then DNA content and quality was determined using spectrophotometry and agarose gel electrophoresis, respectively. Polymerase Chain Reaction (PCR) of genomic DNA fin samples was carried out using 10 pairs of microsatellite primers. All PCR products were electrophoresed on 6% polyacrylamide gel and stained with silver nitrate. Following the scoring of alleles, all parameters including allelic frequency, effective number of allele, observed and expected heterozygosity, shanon index, measurement of similarity and genetic distance and Hardy-Weinberg equilibrium, Fst , Rst and gene flow were calculated using AMOVA analysis in the GenAlex and Popgene programs. The results showed that 8 pairs of microsatellite primers were polymorphic. In total, 50 alleles were determined with the range size of 64-280 bp. The locus omyf had maximum number of allele (26) and loci OTSG 474 and Strurruta58 had minimum number of allele (5). The observed heterozygosity was between 0.86 and 0.964. Hardy-Weinberg departure was observed for all loci from farms 18, 15, 4, E20 and 21 and were disequilibrium (P〈0.05). The farms 14, 8, 7 and 6 were equilibrium at 3 loci, but showed disequilibrium in other loci. The other farms were equilibrium at 1 or 2 loci and disequilibrium at 8 or 9 loci. The FST results showed that maximum FST (0.24) were between farms 1 and 11in which had minimum of gene flow (3.7). Minimum FST (0.04) were between farms 8 and 9 in which had maximum of gene flow (346). Based on the results of AMOVA analysis, significant differences were detected between all farms (P〈0.01). Furthermore, based on Nei 's standard (1972) maximum genetic distance (0.89) were observed between farms 2 and 11 and maximum genetic similarity (0.15) were detected between farms 3 and 4. This result suggests that the unique genetic variation of rainbow trout in hatchery farms of Iran represents a highly valuable genetic resource and provide useful information for creating a based population in the future breeding programs.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Genetic ; Population ; Rainbow trout ; Onchorhynchus mykiss ; Brood stocks ; Microsatellite ; Samples ; Specimens ; DNA ; PCR ; ANOVA
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 78pp.
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  • 33
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    A survey on effects of shrimp aquaculture on the coastal waters of Bushehr (Helleh and Mond) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The effects of aquaculture industry on the environment were evaluated by studying the water quality of Bushehr costal water during culture season 2005 and 2006. The variations of selected parameters such as total phosphorus, ammonia, chlorophyll a, pH, salinity and... Were monitored in effluent canal, influent canal and open sea in Helleh and Mond regions as monthly. Following occurrence of White Spot Disease (W.S.D) in the shrimp ponds of Bushehr province, shrimp culture suspended and entrance of effluent waters completely were blocked since August 2005, despite the absence of aquaculture sewage evaluation of environment and sampling were continued. During releasing of sewage of shrimp ponds to the coastal waters of Bushehr in Jun 2005, the average amount of ammonia in Helleh and Mond were obtained to be 0.161 mg/l and 0.194 mg/l, however the average amount of total phosphorus in Helleh and Mond regions were 0.149 mg/l and 0.043 mg/l, respectively. Although effluent water suspension, amount of ammonia and total phosphorus were increased in both region especially in June 2006. Comparing present data in Jun 2005 and recorded data from culture period 1997-2003 with permitable range of municipal and aquaculture waste show that; aquaculture industry on both regions have not had any obvious negative effect on the coastal waters of Bushehr but it seems if other sources of pollutions in the region is not controlled, then the aquaculture industry can contribute to occurrence of environmental problems.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Environmental ; Survey ; Shrimp ; Aquaculture ; Phosphorus ; Ammonia ; Chlorophyll a ; pH ; Salinity ; White spot disease ; Sampling ; Pollution ; Coastal waters
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 73pp.
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  • 34
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    Monitoring (biology and catch) of kilka in Iranian commercial catch regions (2002-2005) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Through most of the last century, three endemic kilka species supported major commercial species in the Caspian Sea. It is clear that catches and abundance of all species have changed. Recent changes in the Caspian Sea ecosystem have occurred as a consequence of ecological change caused by the invasive ctenophore (Mnemiopsis leidyi). In this investigation which had been done in commercial catch regions during 2002-2004, in addition of biological characteristics survey such as species composition, length, weight, age, sex ratios and maturity stages; catch and catch per unit effort also were analyzed. During the years 2002-2004 the annual catches of kilka varied between 15000-25000 mt and CPUE varied between 1.077-1.474 mt (vessel×night). The frequency of anchovy kilka declined from 69.5% in 2002 to 26.9% in 2004. During the years 2002, 2003 and 2004 the frequency of common kilka were 30.4%, 48.9% and 71.9%, respectively. During this period the frequency of bigeye kilka was negligible. The average fork length of anchovy kilka increased from 100.4 mm in 2002 to 105.0 mm in 2004 and the average weight were 6.4 g and 8.4 g, respectively. The average fork length of common kilka increased from 87.0 mm in 2002 to 93.8 mm in 2004 and the average weight were 5.2 g and 7.4 g, respectively. Anchovy kilka spawn in spring and autumn but mass spawning anchovy occurred in autumn. Spawning of common kilka occurred in spring and early summer. In the age compositions of anchovy kilka, age 3 was the largest age group during 2002 and 2003 (55.3% and 52.1%, respectively). In 2004, age 4 predominated (42.5%). For common kilka, ages 3 and 4 predominated (representing 67.2, 62.0 and 69.1% of catches, respectively). According to CPUE and biological characteristics, after the appearance of ctenophore in the Caspian Sea, the abundance and biomass of bigeye and anchovy kilka collapsed.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial ; Ecological ; Biological ; kilka ; Species ; Ecosystem ; Mnemiopsis leidyi ; Survey ; Length ; Age ; Sex ratios ; Weight ; Maturity ; CPUE ; Anchovy Kilka ; Spawning ; Bigeye kilka
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 49pp.
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  • 35
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    Comprehensive study on assessment of Sturgeons population genetic structure in the Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The population genetic structure of five Caspian Sea sturgeon species was investigated. Totally 1121 samples of caudal and unault's fin tissue of the sturgeons (Acipenser persicus, A. gueldenstaedtii, A. stellatus, A. nudiventris and Huso huso) were collected from the Volga River (Russia), Ural River (Kazakhstan), Kura River (Azerbaijan), Sepidrud River and the coastline of the south Caspian in the Iranian waters as well as from the sampling stations selected for the marine survey for sturgeon stock assessment in the Caspian Sea. All samples were stored in 96% ethyl alcohol and transferred to the genetic laboratory of the International Sturgeon Research Institute. Genomic DNA was extracted using phenol-chloroform method. The quality and quantity of DNA was assessed by Agarose gel (1%) electrophoresis and spectrophotometry. The population genetic structure of Ship and Persian sturgeon was studied using both PCR-RFLP (D-loop and ND5/6 gene) and microsatellite technique and that of H. huso, A. stellatus and A. persicus were studied using microsatellite technique. After amplification of genes using PCR, the RFLP technique was used to digest mtDNA using restriction enzyme. The PCR products were electrophoresed on 6% sequencing polyacrylamide gels followed by silver nitrate staining. Data for PCR-RFLP were analyzed using REAP program and those from microsatellite technique were analyzed using Gene Alex. Population genetic parameters including allele frequency, expected and observed heterozygosity, effective allele, Shannon's index were determined. Genetic identity and distance were calculated following Nei criteria and Hardy Weinberg equilibrium was tested based on X2 and analysis of molecular variance (AMOVA) using Reap and Gen Alex at 99% confidence limit. Phylogenetic relationship was determined and drawn using TFPGA program. The population genetic structure and genetic diversity of the 1121 sturgeon specimens were determined. Three independent populations were identified for Acipenser persicus (two populations in the south Caspian in the Iranian waters and one in the north Caspian). Three independent populations were identified for A. gueldenstaedtii (Volga, Ural and South Caspian populations) using the microsatellite technique. Population genetic structure using PCR-RFLP revealed no genetic differentiation among the A. gueldenstaedtii specimens studied from the different regions using ND5/6 gene, while two populations (Ural and south Caspian populations) were detected for this species with the same technique using D-loop genes. Four independent populations (Volga, Ural, Kura and Sepidrud populations) were reported for A. stellatus using the microsatellite technique and four more populations which most probably belong to the autumn and spring races of the above mentioned independent populations were identified for this species. The present study also identified two populations for H. huso; The North Caspian population (in Volga and Ural Rivers) and The South Caspian population (in Golestan and Guilan regions) which were significantly different from each other (P〈0.01). The genetic population structure of A. nudiventris was studied using the microsatellite and PCR-RFLP techniques which revealed two populations for this species one in the Ural River and the other in the Sepidrud River (South Caspian). Comparison of the ND5/6 and D-loop genes studies in Russian sturgeon revealed that the D-loop gene is better than the ND5/6 genes in population's differentiation and is therefore strongly recommended for population genetic studies on sturgeons in the Caspian Sea. Genetic diversity studied using microsatellite technique was higher and more accurate as compared to that using RFLP. Nevertheless the RFLP technique was able to introduce molecular markers for the population’s species pacific identification. On developing suitable primers these studies can be speeded up and the cost of such studies can be cut down. However the drawback in using microsatellite technique for population genetic studies is that it cannot introduce a molecular marker for the identification of populations. The present study was able to introduce molecular markers to differentiate the ship sturgeon population in the south Caspian from that in the Ural River using the PCR-RFLP technique Based on the results obtained it is strongly recommended that all activities related to restocking and rehabilitation of sturgeon stocks in Iran be conducted on the basis of genetic principles. Also serious and immediate measures should be taken for the restoration and conservation of rare population of native species of Iran particularly in the Sepidrud region using genetic markers before they are become extinct.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Assessment ; Sturgeons ; Population ; Genetic ; PCR-RFLP ; Microsatellite ; Species ; Samples ; Tissue ; Acipenser persicus ; A. gueldenstaedtii ; A. stellatus ; A. nudiventris ; Huso huso ; Survey
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 329pp.
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    The investigation and morphological study of two type of Crass carp : Ctenopharyngodon idella and survival rate of their larvae (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The two groups of grass carp, have been propagated in North and South fish farms and then the larvae were transferring to Abziroshd and culture fish farm of Mazandaran. The fingerling at eight weight classes of 2 to 500 gram were investigated morphologically and some morphometric and meristic were compared. The South grass carp was significant difference (P〈0.05) with the North, in case of weight with the same length, number of vertebral and gill raker. The coefficient of variance (CV) of meristic characters of South Grass carp was in the range of 1.2 to 9.8 while in Mazandaran grass carp 2.8 to 8.6. This CV illustrate the low variance in both population. This research study showed that the two stocks can be regard as difference races from one ancestor.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Meristic ; Morphometric ; Grass Carp ; Population ; Investigation ; Survival rate ; Larvae ; Ctenopharyngodon idella
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 33pp.
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    Species composition monitoring in artificial reefs area in Khuzestan coastal waters (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study was carried out in continuation of previous studies on artificial reefs monitoring in Khozestan coastal waters. The main purpose was the zoo species composition on and around the artificial reefs. Sampling was done from May 2012 to April 2013, from 4 stations in artificial reefs area. Reef structures were sampled by scuba diving. Physical and chemical parameters were measured and water quality status was determined by using WQS index. Zooplankton and macrozooplankton communities were sampled by 100 and 300 micrometer mesh size nets respectively. Benthic animal's samples from sediments around of the reefs body were collected by Ekman grab. Sediment characters, TOM and grain size were analyzed by using ignition loss and size series sieves methods respectively. Secondary production of macrobenthic animals based on dominant species length classes was estimated. Ichthyological information recorded by diver (census and video recording) and Gargoor traps were used for fishing effort calculation .Except for nitrite parameter (p〈0.05) in different stations and silica parameters (p〈0.05) in different months, other parameters were not shown significant differences in studied stations and months. The mean of zooplankton density was (914±52) N/m3 and the Copepoda species were the most abundant group (235 ±10) N/m3.Anosim analysis showed no significant differences in reefs specie composition. Different Crustacean groups were included more than 82 percent of macrozooplanktons communities. Among macrozooplankons, the mean density of decapoda, branchiopoda and copepoda were 302, 296 and 191.5 N/m3 respectively. The mean density of macrobenthic animals was 418±90.26 N/m2 and mollusk, crustacean and polychaets were the most abundant benthic animals respectively. During the study period, total macrobenthos biomass 11.37 g-wet/m2 and its mean value 2.84 g -wet /m2, were estimated. Annual production for polychaets and crustacean groups 154g-wet/m2 and 182 g-wet/m2 were estimated respectively. Annual production of total macrobenthic animals was about 675 g-wet/m2/y. According to sediment analysis, the range of silt-clay (8.7-95.6)% and seasonal mean TOM (4.47-13.25)% were calculated in studied stations. According to attached organisms biomass (wet weight), Cnidarian Anthozoa class with (88)% was the most abundant and then sponge (10)%, Cnidarian Hydrozoan class and arthropoda each one with 1% were included total attached organisms. Due to high biomass of Anthozoa species the most abundant mean was observed in spring season. The Malacostraca group especially Crustacean (72)% was the main mobile animals on reef bodies and then Echinodermata (Ophiurida and marine Orchids) (18)%, Mollusca (Bivalves and Gastropods) (4)% and Polychaets (3)% were the main mobile organisms. The range of Shannon diversity index was (3.22-3.46) and (2.44-3.38) in studied stations and months respectively.Totaly in studied area, the number 15 fishes species were observed and Sparidae family with 3 species were the diverse fish family.The fish Hamour (Epinephelus coiodes,Seranidae) (87)% was presented in all studied months and stations. After Hamour the Neopomacentrue sindensis and Diplodus sargus Kotschyi were the most abundant fishes. The maximum and the minimum of hamour catch per unit effort were in reef B in spring and reef C in autumn respectively .Data comparing showed that except for nitrite the other physical and chemical parameters were observed in the same range by 2005-2007 study. According to obtained results, Zoo communities in different part of ecosystem showed greater diversity than to past years and in comparing to mudflat coastal waters in Khozestan waters, new ecosystem has been created in the region. High diversity of different animal groups that were disperses in water column in early phases of its life and need to settlement to substrate to continuing the life were observed in area. Attached animals plays an important role in biological and ecological characters in the coastal area.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physical ; Chemical ; Ecological ; Biological ; Species ; Artificial reefs ; Sampling ; Zooplankton ; Fishing ; Macrozooplanktons ; Decapoda ; Branchiopoda ; Copepoda ; Polychaeta ; Sponge ; Anthozoa ; Mollusca ; Bivalves ; Gastropods
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 134pp.
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  • 38
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    Epidemiological study on some environmental and management parameters affecting on WSD occurrence in Fenneropenaeus indicus and Penaeus vannamei (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: For the first time white spot disease (WSD) was reported in shrimp farms of khoozestan province, in southwest of IRAN in 2002. Then in 2005 the neighbor province, boushehr, was contaminated. In 2008 WSD outbreak reported in sistan-bloochestan province in southeast of Iran. In 2015 all of southern shrimp farms of country except Hormozgan, the middle southern province, which has remained free of WSD, are being contaminated. White Spot disease suspended shrimp culture in thousands hectares of shrimp farms. Considering that white spot disease has not been observed in Hormozgan province yet, the question is; to what extent environmental and management factors participated in preventing WSD outbreak or cause WSD outbreak. In this study (20102012), the effects of environmental factors and management, stressors that decrease immune system function of shrimp are discussed. In addition, the role of pathogen as the main factor of outbreak is discussed. The goal of this study is to define environmental parameters and management practices associates with outbreak of white spot disease in affected provinces and discover reasons of being Hormozgan province free of this disease. In this study the role of the local environmental factors and management practice stressors in susceptibility to WSD was determine. Both the effects of environmental factors in water of ponds including total ammonia, nitrogen, dissolved oxygen, pH, salinity, transparency, and temperature and management issues related to biosecurity are studied. There were overlaps on physical and chemical parameter values obtained in clear areas with contaminated areas .Results of the data analysis suggest that lack of association with WSD incidence was 7 times greater than WSD incidence despite of disease outbreak in sistan-bloochestan province, so other sources of white spot disease virus incidence was suspected in affected areas. Histopathological examinations and polymerase chain reaction (PCR) tests during project performance did not reveal white spot disease virus evidences in post larvae examined from khoozestan province stocked in farms but disease outbreak was happened in that farms , so we suspected to management practice include feed , pond preparation and carrier of disease . Recorded values of temperature and salinity in some months during inspection in Hormozgan province specified stressful condition that may lead to WSD outbreak, however the disease did not appear. Therefore the hypothesis that the water physical and chemical conditions are reasons to prevent disease outbreak in Hormozgan province is being rejected. The policy of Hormozgan’s fishery authorities, to replaced Fenneropenaeus indicus with specific pathogen free Litopenaeus vannamei, that is more resistant to some of diseases, before incidence of WSD in farms and to before being endemic in the Hormozgan province, made an advantage compare to affected southern provinces that introduced Litopenaeus vannamei after WSD prevalence to their farms. However it does not guarantee to maintain current trend of being Hormozgan province farms free of white spot disease. Therefore establishing the principals of biosecurity are strongly emphasized. Strategies taken by the proficient authorities in preparation of SPF shrimp broodstock can be the most important factor in preventing WSD. Regarding biosecurity principals purchased feed must be free of shrimp head powder. Construction the new shrimp farms should be as far as it could be away from contaminated areas.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Environmental ; Physical ; Chemical ; Epidemiological study ; WSD ; Fenneropenaeus indicus ; Penaeus vannamei ; Shrimp ; White Spot Disease ; Temperature ; Salinity ; PCR ; Polymerase Chain Reaction ; Ammonia ; Nitrogen ; Dissolved oxygen ; pH ; Transparency
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 468pp.
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    Estimation of production potential in lake behind the Halilrud dam in Jiroft city (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In order to the physical and chemical factors, planktons identification, determination of Chlorophylla and primary production in lake on study wad conducted, behind the Halilrud dam in Jiroft city. For this purpose 5 station selected and sampling was performed seasonally. Compersion of physical, chemical factors and planktons were done by duncan multiple test range. Studied factors had the suitable value for fish culture. In classes of Chrysophyceae, Bacillariophyceae and, Chlorophyceae had the most frequency respectively. Totally 49 phytoplanktons genus were identified which 18, 14,8,5 and 3 genus were related to Chlorophy ceae, Bacillariophyceae, Cyanophyceae, Dinophyceae and Chrysophyceae, genus respectively. Nitzchia and Navicula in Bacillariophyceae, Chlorococcum, Pediastrum, Staurastrum and Tetradron in Chlorophyceae, Spirulina, Chroococcus, Phormidium in Cyanophyceae and Dinobryon in Chrysophyceae had the most frequency. From Various group of zooplankton, Copepoda, Naplius, Cladocera, Rotifera (Brachinus, Keretella), Trichuridae were identified in winter season and Rotifera was the most of all. Chlorophylla had not significant difference in 9 seasons but it had significan difference in 5 depthes. Increasing in depth causes to decrease chlirophyla. The most chlorophylla was in 0.5m depth (4.7 mg/m3 ) and the least chlorophyllla was in 20m depth(0.82mg/m3) primary production in lake was calculated by chlorophylla equal to 154 kg/ha/year.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physical ; Chemical ; Phytoplankton ; Zooplankton ; Fish ; Chlorophyll a ; Planktons ; Chrysophyceae ; Bacillariophyceae ; Chlorophyceae ; Dinophyceae ; Nitzchia ; Zooplankton ; Copepoda
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 68pp.
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    Assessment of different methods of water treatment on decreasing pathogenic bacteria in shrimp hatcheries (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The project of "Assessment of different methods of water treatment on decreasing pathogenic bacteria in shrimp hatcheries" achieved by mean of reviewing the effectiveness of various methods on the water treatment to reduce bacterial load of sea water. The project performed in Bandargah region of Bushehr province in order to checking the effect of different methods on the sea water and bacterial population. This project has been done over a year. In this study a total of 138 samples was collected during seven times and was evaluated as well as 7 treatments. In this study, the comparison of the effect of each factors (sand filter, chlorine, ultra violet ray, chlorine combined with ultra violet ray) was analyzed on the sea water by means of disinfection. During this study, other environmental factors such as water temperature, dissolved oxygen, pH and salinity was measured till we can ensure that they don’t have any negative impact on the treatments. Results showed that the density of total bacteria in sea water (Control) was averagely 5187 CFU/ml, this was done while the total density of bacteria in the sea water, reservation pool sample, sand filter water, water that irradiated with ultraviolet rays, chlorinated water and the water that was influenced by both chlorine and ultra violet ray was respectively 5187 2137, 4449 2042, 2782 1335, 1164 692, 143 104, 87 76 CFU/ml. Therefore, reservation pool, sand filter, ultra violet ray, chlorine, chlorine-ultra violet ray each of them was reduce respectively 14, 46, 77, 97, 98 percent of the density of total bacteria or in other words they reduced 0.06, 0.27, 0.65, 1.56, 1.77 log of the total population of bacteria in water. Moreover, the results from the total count of vibrios showed that reservation pool, sand filter, ultra violet ray, chlorine, chlorine-ultra violet ray each of them was reduce respectively 17, 47, 74, 98, 99 percent of the density of total vibrios or in other words they reduced respectively 0.08, 0.27, 0.59, 1.66, and 1.95 log of the total population of vibrios in sea water. Also the bacteria that isolated from each treatment were identified with the use of biochemical methods that totally were includes a wide range of bacteria, the identified vibrios were: Vibrio alginolyticus, V. costicola, V. fischeri, V. fluvialis I, V. fluvialis II, V. harveyi, V. natriegens, V. nigripulchritudo, V. parahaemolyticus, V. plagius I, V. vulnificus, V. anguilarum I, V. campbellii, V. nereis, V. proteolyticus, V. splendidus, and Unknown V. spp. Other identified bacteria belonging to the following genus: Acinetobacter, Aeromonas, Alcaligenes, Bacillus, Borkholderia, Eschricia, Enteroacter, Flavobacterium, Micococcus, Proteus, Pseudomonas, Serratia, Staphaphylococcus, Streptococcus, and Unknown Bacteria spp. By comparing the results, we concluded that the best result was related to treatment that the sea water had been disinfected after the combined effects of chlorine and ultraviolet ray. It was determined that this process in compared with other treatments, had been reduced the total number of bacteria, the total number of Vibrios, the number of sucrose fermentative vibrios, and the number of non-sucrose fermentative vibrios respectively 98, 99, 98, 99 percent. In other words, the number of bacteria was reduced respectively 1.77, 1.94, 1.82, 2.23 log. So in this study, the applied method was introduced as the most effective way of disinfecting sea water. Meanwhile, none of pathogenic bacteria for shrimp including Vibrio harveyi was isolated by using this treatment. Comparing the results showed that the combined effects of chlorine and ultraviolet radiation is the most effective applied method for disinfecting sea water.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Shrimp ; Water treatment ; Sea water ; Bacteria ; Hatchery ; Assessment ; Population ; Temperature ; Dissolved oxygen ; pH ; Salinity
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 84pp.
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    A Survey about Existence Currency of Warm Water Fish in Northern Alborz (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Aquaculture is the most important part of Fisheries Organization duties in Iran. During several planning and developing programs, aquaculture productions had a considerable growth. Due to good potential, these productions were higher than the planed one. The North Alborz regions were investigated by four groups of experts. The regions which investigated were including 3 important provinces (e.g. Guillan, Mazandaran and Golestan). The area where investigated was 940 km along with coastal zone of Caspian Sea or 58678 km2 in total. Around 27% of aquaculture production came from this region. However, subdivision of fisheries can play important role in the economics in the region. The fisheries sub-sector has an important role in the economy of the region, and despite the great potential for agriculture and tourist industries in the North Alborz, there is a significant role in the prosperity of the fisheries activities. In the present study shows that Mazandaran and Guillan provinces has more potential in reservoirs and aquaculture production when compared with other provinces. Productions in Mazandaran either in reservoirs were less than Guillan province. Due to lee in reservoirs, Mazandaran had less investment when compared with Guillan province. The figures show that carrying capacity of aquaculture production for 3 provinces (Mazandaran, Guilan and Golestan) was higher than other provinces in the entire country. Due to, large land base, less investment, more interesting of farmers, no needs of complicated technology, farmer would be able to develop reservoirs as consequences to enhance productions. However, developing reservoirs and supporting of it's; can increase the contribution of warm water species in inland water.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Existence Currency ; Warm Water ; Fish ; Aquaculture
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 138pp.
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  • 42
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    Study on feasibility of live Cobia (Rachycentron canadum) capturing in northern waters of Persian gulf & Oman sea (Hormozgan province) and rearing them to subadult stage in concrete tanks (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In order to obtaine live individuals of cobia ( Rachycentrun canadum ) , coastal waters of Jask, Sirik, Kolahi , Bandar Abbas, Bandar-e Lengeh ,Bandar-e Bostaneh and Abu moosa ,Hormoz and Qeshm Islands have been surveyed from March 2008 to January 2010 in Northern waters of Persian Gulf (Hormozgan province). All in all 60 alive fishes obtained from fishing boats and transferred to Aquaculture Department of Persian Gulf and Oman Sea Ecological Research Institute (PGOSERI), but 50 of them died and only 10 fish survived. They divided in two groups and cultured in separated concrete tanks. Fished were fed with trush fish twice a day at a feeding rate of 4-5 percent of body weight. Culturing period last about 6 months. All the fishes gradualy died through the culturing period. Average of specific growth rate in group 1 and 2 were about 0/49 and 0/77 respectively. The weight gain for group 1 (WG) was %75 for 75 days of calturing time and % 142 for 190 days of culturing time while for group 2 it was %31 for 54 days of culturing time and % 75 for 190 days . Average weight of fishes belong to group 1 reached from 950(g) to 2150 (g) during 6 months, while group 2 reached from 872(g) to 1271/5 (g) in 3 months. Feed conversion rate (FCR) for group 1 and 2 were respectively about 6.9 and 6.8. With regard to cost of trash fish (about 2000 Rials per kilogram trash fish) the per unit feed cost of cobia production were 13613 and 13730 Iranian Rials per kilogram, respectively for group 1 and group 2. Results revealed that obtaining live individuals of cobia is very difficult and also cobia didn t grow well in concrete tanks but if we have better coopreration of local fishermen and also provide some Equipment such as cages in order to rear cobia in the sea , it is possible to achive more succes and obtaining better results .
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ecological ; Rachycentron canadum ; Cobia culture ; Specific growth rate ; SGR ; Alive capture ; Survey ; Aquaculture ; Concrete tanks ; Fish ; Coastal waters ; Aquaculture
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 50pp.
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    Survey of Epidemiological of parasitic and bacterial infection in cultured fishes of Khouzestan province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this study which was carried out in khouzestan province , 1914 Pieces (1160 Pieces silver carp, Hypophthalmychthys molitrix; 498 Pieces common carp , cyprinus carpio; 172 Pieces Grass carp, ctenophryngodon idella and 84 Pieces Big head, Arysthychthys nobilis) from different parts of the province were examined. In three year period, 1378 to 1381, fish samples from four stations were transferred a live to the lab . Water samples also were taken and tested for some of the physicochemical factors. From a total of 1914 fish examined, 1190 showed Parasitic infestation and bacterial infections (62.2%). Infestation study, infestation with these parasites have been found: Ichthophthirius, cryptobia, Trichodina, Costia, Hexamita, Dactylogyrus, Gyrodactylus, Lernea, Bothrio cephalus, Diplostomum and Capillaria. Also some species of Aeromonas, staphylococcus, Moraxella, Pectobacterium, Flavobacterium, Citrobacteria, pasteurella, Psedomonas and Alcaligenese were identified in the samples, which normally occur in Water , but in some conditions( High pH,temperature and ammonia) could cause disease and lesions specially in gills. Infestation with dactylogyrus and Gyrodactylus was found in all four kind of fishes with different infestation rate. But the highest infestation rate with dactylogyrus was in silver carp (55.2%) and lowest in common carp (14.6%). The highest infestation rate with gyrodactylus was in grass carp (42.4%) and lowest in common carp (10.6%). Ich, Bothrio cephalus and capillalia were found only in common carp and grass carp. Infestation with adult lernea and copepodid stage of lernea had greater percentage in the gills and derm of grass carp. The data showed infestation with this parasites (specially protozoans and lernea) and bacterial infection had occurred in all seasons specially in C area.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Epidemiological ; Silver carp ; Hypophthalmychthys molitrix ; Common carp ; Cyprinus carpio ; Grass carp ; Ctenophryngodon idella ; Big head crap ; Arysthychthys nobilis ; Ichthophthirius ; Cryptobia ; Trichodina ; Costia ; Hexamita ; Dactylogyrus ; Gyrodactylus ; Lernea ; Bothrio cephalus ; Diplostomum ; Capillaria ; Survey ; Infection
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 47pp.
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  • 44
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    Study of fish consumption per capita per year in rural and urban areas of Markazi Province, Iran (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Survey method has been performed using questionnaire forms for study of fish consumption per capita per year in Markazi Province due to lack of enough data on this field in the said province. Each questionnaire was completed by asking questions from each of the families as a statistical population sample either in rural or urban areas. According to the national census in year 2008 by Iranian Statistical Center, there are 364564 families living in Markazi Province out of which 207802 (57%) families are urbanites and 156762 (43%) are ruralist. A sample with total population of 2525 families were chosen with 1455 families living in urban and 1075 families in rural areas. Systematic random sampling was adopted in both areas which show people consuming fish once in 25 days with 5.8 Kg as per capita and per year for the whole Markazi Province.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Consumption ; Statistical population ; Consuming fish ; Rural areas ; Urban areas ; Survey ; Capita ; Population ; Sample
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 202pp.
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    Determination of dietary requirements of Acipenser persicus from larval stage to market (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Growth experiments were conducted in a random statistical design to determine the dietary requirements of Persian sturgeon, Acipenser persicus. In this study the effects of various dietary protein and energy and their optimum P/E proportion in diets was estimated on growth and carcass composition in A. persicus in the fingerling and grow out stage in three different phases. In the first phase, 16 semi pure diets with 4 protein levels (35, 40, 45 and 50%), each with four energy levels (18.5, 19.8, 21.1 and 22.4 megjoules/kg diet) and P/E proportion of 15.63 to 26.4 mg protein KJ-1 were formulated and fed to 960 A. persicus fingerlings, with a mean weight of 10.26±0.11 for 112 days. Three replicates were used for each experiment group. In the second phase, 432 A. persicus juveniles with a mean weight of 112.25±1.187 g were fed 12 semi purified diets with 3 protein levels (40, 45 and 50%) each with 4 energy levels (18.5, 19.8, 21.1 and 22.4 megjoules/kg diet) and P/E proportion of 18.9 to 26.4 mg protein KJ-1 for a period of 101 days using three replicates for each treatment. In the third phase, 384 juvenile A. persicus with a mean weight of 803.26±3.5 g were fed 16 diets for a period of 140 days. Two replicates were used for each treatment group. At the end of the experiment 30% of the fish population was randomly selected for carcass analysis to determine protein, lipid, moisture and ash content. Hepatosomatic index of the fish specimens was also determined. In the fingerling stage the fish fed 45 and 50% protein with 22.4 megjoules/kg diet energy exhibited the best growth indices [final body weight, percentage body weight increase (BWI%) and specific growth rate (SGR)] (P〈0.05). A diet containing 40% protein and 22.4 megjoules/kg diet energy with P/E ratio of 17.86 mg protein KJ-1 is the recommended diet for A. persicus in this stage. In the first phase higher growth rates were observed in fish fed diets containing 40% protein as compared to those fed diets containing 45 and 50% protein. Increasing energy levels to 21.1 and 22.4 megjoules/kg diet significantly increased (P〈0.05) growth indices. Highest values for growth indices belonged to fish fed diets containing 40% protein, 22.4 megjoules/kg diet energy and P/E ratios of 17.86 mg protein KJ-1. Final weight, BWI% and SGR in fish fed diets containing 40% protein were higher as compared to fish fed diets containing 35, 45 and 50% protein. Increasing energy levels to 22.4 megjoules/kg diet resulted in significant increase in growth indices as well as P/E ratios. Highest growth indices were recorded with diets containing 40% protein, 22.4 megjoules/kg diet energy and a P/E ratio of 17.86 mg protein KJ-1. Results obtained indicate that A. persicus showed better growth rates after acclimation to formulated diets, and therefore can be considered a suitable species for culture in captivity. On the basis of growth rate and carcass composition diet containing 40% protein, 20.1 to 25.9% lipid with a P/E ratio of 17.86 mg protein KJ-1 prepared from good quality fishmeal, fish oil and vegetable oil (sunflower or soybean oil) is recommended for feeding A. persicus in the fingerling and grow out stages.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Acipenser persicus ; P/E ratio ; Growth Rate ; Carcass composition ; Hepatosomatic index ; Persian sturgeon ; A. persicus ; Fingerlings ; Population ; SGR ; Species ; Fish oil
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 98pp.
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  • 46
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    Rearing of common carp (Cyprinus carpio) in fiber glass tanks with pellet feeding (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The intensive culture of common carp (Cyprinus carpio) evaluated in fiberglass tanks(2*2m) with feeding on pellet during 8 weeks.The fish (n=201)of common carp selected from three treatments along with three replicates as the average of fish weight was less than 100(g )which divided into 〈50(g), 50-70(g) and 70-100(g).At the first experiment , there is no statistically significant difference between fish weight in relative to replicate treatment (P〉0.05).The common pellet food was chosen for feeding from market as fish were fed by the mean of 4% of their body weight a day. The result indicated that the mean of particular growth ratio at first treatment (0.54) has higher than second treatment (0.34) but in comparison with third treatment (0.46), there was no statistically significant difference (P〈0.05).Also, the conversion ratio at first treatment (5.28) and third treatment (6.09) was lower than second treatment (35.66) and third treatment (20.91) was lower than second treatment (24.24), (P〈0.05). This study showed that monoculture in small scale is eassible by utilizing artificial diet, if the water quality is exposed to change. In this survey, the conversion ratio of the fish was relatively high whereas the growth rate was low.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Common carp ; Mono culture ; Pellet ; Fiber glass tank ; Cyprinus carpio ; Feeding ; Weight ; Growth Rate ; Artificial diet
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 21pp.
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  • 47
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    Stock discrimination of Rutilus rutilus by using Otoliths (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Trace elements incorporated into growing surface of the fish otoliths. It reflects the physical and chemical characteristics of the ambient water. Since otoliths grow continuously without re-absorption throughout the life of the fish, fish population growing up in different elemental composition. Trace element concentration in fish otoliths was analyzed by proton induced X-ray emission (PIXE). Otoliths were collected from Rutilus rutilus, during 1999-2000 in the eastern part of Caspian Sea. Ca, K, Sri Cu, Zn and Br in the otothis can be detected by using PIXE our results inform K, Sr, Fe, Zn as marker of this study. Therefore, in the two different conditions, separate 'age classes and without separate age classes, Astara and Turkmen regions were discriminated. Comparison of mean age in the different area show, deference of mean age is significant in the Astara and Turkmen.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physical ; Chemical ; Stock discrimination ; Rutilus rutilus ; Otoliths ; Population
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 77pp.
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  • 48
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    The survey of vital condition on Sturgeon fry, when they were released into Tajan River by tagging (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This Tajan river in / April/ 2000 and was followed to one year of Four stations selected from estuary to farah Abad station. Sampling occured to limited: (the survey of characteristic and choloride toxins in above limited in relative of three stations. Forty thousands species of Acipenser persicus fry with the different average weights were delivered fry were tagged and then the tagged fish were released in released stations in the different times. The fishing stations and the survival time in fry in the river, determination of upper and down streams in releasing area, Nutrition, Microbial diseases and estimation of catch populations in repeated fishing were evaluated. The physico - chemical characteristics of water and the evaluation of condamination were surveyed in the river. In addition, .the- evaluation of frequency and biomass (such as benthos and zooplankton were surveyed in the river). Finally, the effective factors in the mortality of fry in relative before and after releasing, the best place for releasing area of fry in the river was introduced into execution selection. The survival time of fry is low in the river and it depends on the distant between from the releasing area to estuary and the releasing time. Fry were passed from estuary after 24 hours and fry were approached to the sea after 48 hours and also the peak migration of them has been from 12 p.m to 3 a.m. The internal migrations don't have toward Upper River and these migrations have toward the sea. Fry haven't fed in survival time but after fourteen days, they caught in coastal section. The gammaridea and hypania (type of hypercilia) were fed by them. Before the releasing, fry have been contaminated by bacterial agents. The contamination rate was 3.3% but after releasing and passed from estuary have not been contaminated. The survey of the chemical and physical features in area indicated that the salinity was ascended higher than six ppt in third decade of April. The other factors indicated a healthy ecosystem. Of course, the increasing of salinity was related to Debi in water that approached to zero. The survey of choloride toxins in water indicated that were lack of difficult survey area in rivers. These toxins have been compared to another toxins such as hexa - choloro - benzen (a -HCB) that this concentration has a high in estuary. The evaluations the biomass of nutrition (Benthos and zooplankton) in the river indicated in the relative to benthic condition was included six classes. They contain bottom invertebrates, they have been identified 11 families and 9 species and so they consist of Insecta, Olighocheata class, Crustancea class, hypercilia class, Crustacea class, Bivalva class, Gastropoda class, it is obvious that the estuary station have a high biomass of benthic organisms and it has higher variation species than other stations. The zooplankton condition, In addition, it is belong to zooplankton that was identified to Rotatoria - Cladocera - Copepoda- Barnacles - Protozoa and forminofera as the beginning of spring season. Zooplanktons have a high variation but the end season, they have a below amount. Although, the gill net has one (cm) in mesh that sturgeon fry entrapped them the main effective factor of mortality about sturgeon's fry took place when sturgeon's fry entered into the sea. But the qoopegative company net of fishing, sturgeon's - fry caught in by catch that this agent were threatened when sturgeon's fry entered in to the sea. The evaluating of two stations for releasing the fry (research and farah Abad stations), the .research station (distance 500 m from estuary) has the best area for the releasing. the sturgeon's fry (fingerling) was introduced into the excution section . Key word Tajan river, Acipenser persicus (Sturgeon's fry gillnet) - nutrition, Microbal diseases, Choloride toxins.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Sturgeon ; Fry ; Insecta ; Olighocheata ; Crustancea ; Hypercilia ; Crustacea ; Bivalva ; Gastropoda
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 134pp.
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  • 49
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    Investigation of Indian white shrimp ( penaeus indicus ) Populations in west and East of Jask area by genetical method (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The objective of this investigation was molecular study of Penaeus indicus population from Jask area. Samples were collected using bottem trawl net from three regions, East, West and Central Jask. DNA were extracted using phenol - chloroform method from muscular tissue. To investigate population differences of P. indicus, the specific primers were designed by sequence of Cytochrom oxidase I (CO I) gen in mtDNA molecule. PCR was performed using two spesific primers and the reasonable result achieved (600bp) for all samples. The PCR products of samples were digested by restriction endonuclease enzymes such as (Alu I, and followed by polyacrilamid gel Taq I, Hinf I, Rsa I, Dde I, Hinc II, Hind III, Hpa II, Ecor I, Pvu II) Observed by silver nitrate staining method. electrophoresis (PAGE) The bands of DNA were the same in all samples and the results indicated no polymorphism between samples. These results may suggested that cytochrom oxidase I gen in Penaeus indicus is a conserved gen or numbers of restriction endonuclease enzymes enough for the study of genetic variations in or all samples are belong to a single genetic population and was no possible for isolation of different genetic populations in this specie. Maybe the East, West and Central Jask are not sofar from eachother and absence of any Human made or different Biology in these sites are expected and no changes in genetic level.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: mtDNA ; PCR ; RFLP ; Penaeus indicus ; Gentic variation ; Cytochrom Oxidase I ; Molecular ; Population
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 54pp.
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  • 50
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    Survey on some biological aspects of shrimps of the Caspian Sea in the coastal water of the Golestan province ( Phase 1 ) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study was conducted from january. 2002 to April .2004. During this survey four research cruises were carried out on aquatic animals. This survey was based on cruise and area which are as follow: 1. Identification of species _ Palaemon adspersus _ Palaemon elegans 2. Length and weight frequencies 3. Length and weight Relationships 4. Distribution according Catch Per Unit Area (CPUA) separately for each sampling station. 5. Sex ratio of P. adspersus 6.Biomass P. adspersus: Following results for p. adspersus was obtained in The Gorgan bay: Min. and Max. of carapace length (CL) in 1st cruise were : 11.50 and 18.40 mm ( female ) 9.60 And 15.70 mm (male) respectively. CL mean was 13.99 ±1.51 and 13.61 ± 1.37 mm for female and male respectively. Min. and Max. of total weight (TW) was 0.7 and 3 gr. (female ), 0.2 and 1.80 gr. (male) which their mean was 1.36 ±0.51 and 1.23±0.32 for female and male and female respectively. Min. and Max. of CL in 2nd cruise were: 8.70 and 18.70mm ( female),8.70 and 15.60mm(male)which the mean were 13.89±2.4 and 11.59±1.62mm for females and males respectively. Min. and Max. of TW in Second cruise were 0.6 and 3.80 gr (female), 0.5 and 2.70 gr (male) which the mean were:2.13±0.7 and 1.22 ±0.43 for females and males respectively. L/W relationship equations were as follow in the 1st and 2nd cruises: 1st cruise: TW = 0.0007CL ^2.8418, R²= 0.7623, (female) TW=0.0014CL^2.5872, R²=5402, (male) 2nd cruise: TW=0.0066 CL^2.1847, R²=0.8146, (female) TW= 0.0044 CL^2.2859, R²=0.8149, (male) Sex ratio (M/F) in the 1st and 2nd cruises were 1.18:1 and 0.44:1Respectively. Distribution in the 1 st cruise obtained in the East, eastern south near coasts (less than 1 n mile) and in the 2nd cruise obtained in the North east, North and South parts near coasts. In the South east of the Caspian Sea: Min. and Max. CL were 5.6mm (1st cruise) and 17.50mm (3rd and 4th cruises). L/W relationship equations were: TW = 0.0019 CL^2.6037, R²=0.7814 (3rd cruise) And TW = O.0023lCL^2.5475, R²=0.8804. In general numbers of shrimps were less in the 1st and 2nd cruises. Sex ratio (M/F) obtained 1:1, 1:1, 0.52:1, and 1.02: 1 respectively from 1st to 4th cruises. Shrimps were present in all depths however, when the temperature dropped this species moved toward deep water. P.elegans: CPUA and Biomass were estimated . The biomass was 46.64 Kg and 97.62 Kg in TheGorgan Bay and south east of The Caspian Sea respectively . The number of P.elegans was very few both in the Gorgan Bay and the South east of the Caspian Sea. The review of The P.elegans is described at The very end of the present research report.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Palaemon adspersus ; Palaemon elegans ; Length ; Weight ; Frequencies ; Relationships ; CPUA ; Biomass ; Survey ; Biological ; Coastal waters
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 47pp.
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  • 51
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    Study of some biological characteristics of golden grey mullet (Liza aurata) in Iranian Coastal waters of the Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: During last 65 years the catch of mullets had increasing trends with some fluctuations in the Iranian coastal water of the Caspian Sea .In this period about 138 thousand tons of mullets have been caught. Mullet’s account for 35% of total catch annually .In recent years species composition of mullets has chanched in the Iranian coastal water of the Caspian Sea and catch composition of golden grey mullet increased from 76% in 1995 to 98% in 2006. In this survey some biological characteristics of golden grey mullet have been studied in Iranian coastal water of the Caspian Sea .Fish samples have been gathered from commercial catch of beach seine cooperatives monthly in Iranian coastal water of the Caspian Sea over 2006 and 2007. In the laboratory fishes have been measured biometrically and biological parameters have been calculated .Also catch statistics of mullets during 2006-2007 have been obtained and discussed. Results showed that the catch of mullets in beach seine cooperatives during 2006 and 2007 was 4181 and 3685 tons respectively that golden grey mullet contribute 99% and 98% of the catch composition of mullets respectively. Length range of golden grey mullet caught by beach seine cooperatives was 19-50.2 cm with mean length of 32.7 ± 6.4 (± SD) and weight range was 67-1475 gr with mean weight of 411 ± 255 gr. The age structure of this species was comprised 2-10 years old fish with mean age of 4.42 years old. In this survey totally the sex ratio of male:female of golden grey mullet was 356: 434 that was significant variation from equal sex ratio. Pick of the spawning in Guilan province was in October and in Mazandaran and Golestan provinces was in November. In October the proportion of spawning females declined from western area (Guilan province) towards eastern parts (Golestan province).The highest proportion of spawning females was in December in Golestan province. The highest GSI index value was observed in September and October and it was decreased in November and December and it was consistent during January till April. The mean absolute fecundity was 700881 ± 429987 eggs with minimum and maximum fecundity of 200112 and 2282862 eggs respectively. The Lm 50% for female golden grey mullet was calculated as 33.6 cm.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Commercial ; Golden grey mullet ; Liza aurata ; Species ; Survey ; Samples ; Male ; Female ; Sex ratio ; Spawning ; GSI ; Fecundity ; Coastal waters
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 56pp.
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  • 52
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    Survey of different dietary energy and protein levels on the reproduction indices of Benni (Barbus sharpeyi) broodstock (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The survey of different protein and energy levels of brooders Benni(Mesopotamichthys sharpeyi) diet on reproductive indices This study,to preparation of suitable diet for brooders of Benni(Mesopotamichthys sharpeyi) carried Out increasing efficiency artificial propagation and achievement to maximum working fecundity and fingerling production. 9 dietary feeding with 3 triplication were prepared that included 3 protein levels(30,35 and 40 percentage) and 3 different levels of digestable energy (250,300 and 350 kcal/100g).The reproductive indices (working fecundity, fertilization, hatching and survival rate) were studied in this experiment in South Iran Aquaculture Research Center .12 female brooders in any triplication were transported to earthern ponds 300 m2. They were fed 2 times in days for 4 month until satiation.The artificial breeding carried out in spring for survey of reproductive indices. The amount of hypophysis injection was 3mg/kg weight of fish with two doses10% in first stage and 90% in second stage with interval 10 Hour . The male broodstock injection was first stage spantanously with second females injections with a dose of 2 mg/kg.The total of breeding stages until larvae release was registered 22.5-24.5°C. Result showed that constant protein (35%) with rising energy until specified amount(350 Kcal/100g) was increased reproductive indicies.The working fecundity is one of the reproductive indices that in treatment 5 had significant difference compare to other treatment.In this survey, Comparison between different levels of dietary protein and energy on the brooders Benni indicated that 35% protein level and 350 Kcal/100g energy for barbus grypus had best efficiency in diet of broodstock.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Brooder diet ; Benni ; Mesopotamichthys sharpeyi ; Reproductive indices ; Dietary ; Protein ; Level
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 42pp.
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  • 53
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    Survey on bony fish catches in Gorgan Gulf (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Fishing in Goroan Bay began on the first of Shahrivar 1379 (23 August 2000) and finishid at the year end of fishery Mordad 1380 (22 August 2001) continuhng for a year fishery nets caught seven species of benefish with two species reported being caught unauthorizediy controlling and counting unauthorizediy nets were done twice a week during the year with the result of 139734 unauthorizediy nets. Based on the biometrics of the fishes caught in research nets the number of various species was calculated. The of rate of fishing in CPUE (a stering of day net) research nets was 1.20 kg. The rate of unauthorizediy fishing in Gorgan Bay throughout the year was estimated as 167681 kg of the value CYPRINIDAE had the highest fishing rate of %28.2 (about 47 ton) , and Chalcalburnus chalcoides and GOBIIDAE with %0.4 (747 kg) the lowest , with Chalcalburnus chalcoides having a very little rate of fishing (17 kg). In addition , the rate of fishing in CPUE (a stering of day net) was estimated as 0.25 , 0.21 , 0.18 , 0.15 , and 0.07 kg for Liza saliens , Rutilus rutilus caspicus and CLUPEIDAE respectively. According the comprised %20.9 , %17.3 , %15.1 , %12.28 and %5.6 respectively of the total fishing in the Gorgan Bay. MUGILIDAE, which are found in two species in Gorgan Bay , comprised %35.7 of the total fishing: Liza aurata with %57.7, and Liza saliens %42.3. The average age of fishes caught in Gorgan Bay was estimated to be 4.7 , 4.68 , 3.81 , 2.96 , 4.41 and 3.75 years old for CYPRINIDAE, Liza aurata , Rutilus frisi kutu Kamenskii , Liza saliens , Rutilus rutilus caspicus , and CLUPEIDAE respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Rutilus rutilus caspicus ; Liza saliens ; Rutilus frisi kutum ; Survey ; Bony fish
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 56pp.
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  • 54
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    Investigation population changes of sturgeon in the southern coastal waters of the Caspian Sea (Mazandaran province) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In present research work, variation and distribution of Sturgeon fishing lower depth of 10 meter of Caspian Sea were investigated. The CPUE and the population structure, such as total length, fork length and weight during 2003-2005 in southern part of Caspian sea were recorded. In 2003-2004, the total number of 300 fish were sampled including Acipenser Persicus 244 A.stelatus 35, A. nudiventris 120, A.goulden stadti, 9 . In the period of the next year (2004-2005) 412 Fish were lollected, consist of A. persicus 370, A.stelatus 14, A. nudiventris 8, A. goulden stadti 19, and one Huso huso. The CPUE (in night) in 2003-2004 For A.persicus, A.stelatus, A. nudiventris, A. gouldenstadti were 4/05 , 0/58, 0/20 and 0/15 respectively, where as it was 6.17 for A. persicus 0.23, A.s 0.13, A.n 0.13, A.g and 0.02 for Huso huso. The mean total length For 2003-2004 of A. persicus was 26 ± 10.86 cm A.s 49.7± 14.5, A.n 38±13.79 A.g 43.1± 10.25cm. In 2004-2005 it was 21/0±18.56, 52.5±25.53, 30 ±13.09 , 23.37 ± 12.2 and 50cm for A.p, A.s, A.n, A.g, Huso huso respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Investigation ; Population ; Sturgeon ; Coastal waters
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 75pp.
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  • 55
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    Single cell protein Production from culture and marine fish wastes (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The alarming rate of population growth has increased the demand for food production in third-world countries leading to a yawning gap in demand and supply. This has led to an increase in the number of hungry and chronically malnourished people. This situation has created a demand for the formulation of innovative and alternative proteinaceous food sources. Single cell protein production is a major step in this direction. SCP is the protein extracted from cultivated microbial biomass. Algae, fungi and bacteria are the chief sources of microbial protein that can be utilized as SCP. Produced proteins from these microbes have various nutrition values. SCP is the manufacture of cell mass using microorganisms by culturing on available agriculture, industrial wastes and fisheries by products. Fish wastes due to high protein are the most important substrates for SCP production. In this study, SCP production was done from Silver carp and tuna fish wastes (head, tail and vise versa) and cooked water of canned tuna factories. The used microbes were six genus and species of yeasts include Candida utilis, Saccharomyces cereviceae, Rhodotorula, Khyveromyces marxians, Zygosaccharomyces rouxii and Bacillus subtilis and B.licheniformis. The examination was done in bench scale and CSTR bioreactor (Continuous Stirred Tank Reactor). The effects of various parameters such as pH, temperature, time, supplemented substrates, method of inoculation of microbes, rpm were evaluated. Changes of microbial growth and protein contents were tested by using Optical Density (OD) and Makrokjeldal methods respectively. In end of examination, produced protein were extracted and lyophilized. The results showed that protein percentage in bacterial protein was than yeast protein but wet percentage in bacterial protein was low. Production value produced from tuna fish wastes was higher than (30-45 g/l) to Silver carp wastes (25-29 g/l) and cooked water (10-15 g/l). By adding supplemented substrates, production value has been increased. Candida utilis, in comparison other yeasts, has high activation. B.licheniformis has also had more activation than Bacillus subtilis. The results of the effect some parameters on fermentation showed that yeasts and Bacillus in pH= 5.4 and 32oC and pH=6.9 and 35oC were better than growth pH=6 and 25oC and pH=6.5 and 30oC respectively. Time of fermentation in batch and bioreactor was 54 and 21 hours respectively. High rpm has been caused increasing of microbial growth in bioreactor. The conclusion showed that with optimizing of the growth condition such as some parameters (pH, temperature, substrates and so on) produced SCP with high efficiency. However, produced SCP should be exanimated with other specific tests such as amino acid and fatty acid profiles, minerals, nucleic acids and so on. After full examination, this SCP as probiotic could be used in fish and poultry feed.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Single cell protein ; Marine ; Culture ; Fish wastes ; Yeast ; Bacterial ; Population ; Growth ; Biomass ; Algae ; Fungi ; Nutrition ; Candida utilis ; Silver carp ; Bacillus subtilis ; B.licheniformis ; pH ; Protein
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 132pp.
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  • 56
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    The percentage determination of Rutilus frisii kutum (200, 500 and 1000 mg) resistance to salinity, turbidity and decrease of oxygen by usage of the river water at the releasing meantime (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The survey effect of salinity, turbidity and dissolved oxygen performed on Rutilus frisii Kutum juveniles with aim, which was determined about survival rate and histological changes in gill and kidney tissues. Juveniles provided from the Rajai's fish propagation center and then examined in Caspian Sea Ecology Research Center laboratory. The juveniles were investigated on three weight group (200-〈400, 400-〈600, 600-〈1000 mg) and two dissolved oxygen levels (7.6 ± 0.19, 3.8 ± 0.15 mg/L)in fresh water and Caspian sea water(12.5 ppt). Also, six turbidity levels (50 FTU, 430FTU, 2600 FTU, 7800 FTU, 15600 FTU) were probed in freshwater during 168hr. Each treatment has three replications. The factorial test evaluated for survival rate in treatments. The results shown that there was a significant difference among treatments in the different levels of factors, (p〈0.05, Duncan test). The juveniles' survival rate has decreased than control treatment in brackish water and turbidity in freshwater. It was demonstrated that with increasing fish weight, therefore, the survival rate is increased. The lowest survival rates under salinity stress (〉75%) had shown in 400-〈600mg weight group with dissolve oxygen: 3.8±0.15SE mg/l. In addition, the lowest survival rates under turbidity stress (95.83%) had shown that in weight group less than 400 mg with turbidity 15600 FTU. Therefore, survival of juveniles was high. However, gill tissue of juveniles under turbidity and salinity stress became short (necrosis) and thick (edema and hyperplasia) in the end of experiments. The juveniles gill tissues were not changes in the river clear freshwater. Therefore, the factors of gill tissue deformation were salinity and suspended particles in the water. However, the structures of kidney in the different groups of juveniles were similar. Nevertheless, juveniles glomerular diameter increased with increasing weight (p〈0.05, Duncan test). Furthermore, there was a increasing the internal cavity of the proximal and distal tubules and decreasing of glomeruli in diameter in the transfer of juveniles from freshwater to brackish water. Although the survival rate of juveniles is acceptable in this study, but there was abnormal changes in the structure of them gills. It appears that this change will cause a disruption in trend of juvenile's growth.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ecology ; Rutilus frisii Kutum ; Juvenile ; Salinity ; Turbidity ; Oxygen ; Survey ; Survival rate ; Gill tissue ; Freshwater ; Brackishwater
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 71pp.
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    Study of Shovier and Mirzakhanlo dam reservoirs in Zanjan province in order to aquaculture activity (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Inland water aquaculture activity have been known as an important approach for protein production while reservoir lakes recognized to have a significant potential for this purpose. Zanjan province in Iran with several dam reservoirs is suitable for aquaculture development. This study was conducted on biotic and abiotic factors of two lakes Shovir and Mirzakhanlo in order to determine aquaculture potentially of reservoirs. This two lakes located on different climatic region; Shovir located in region of semi arid area with very cold weather in winter, while Mirzakhanlo is in semi humid area and warm weather characteristic. In this study the plankton, benthos and fishes were assessed and the 15 hydrochemical factors were measured in order to determine the fisheries potential for fish introduction or release. The results showed that the phytoplankton abundance of Mirzakhanlo varied between 1.6 to 45.2 million cell/l. with 32 identified genus. The zooplankton abundance varied between 48 to 632 n/l. and 22 identified genus. The abundance plankton in shovir varied between 1.350 to 34.2 million cell/l. and 240 to 4500 n/l. for phyto and zooplankton respectively. Macrobenthos biomass were 21.4 and 0.34 g/m2 in Shovir and Mirzakhanlo lakes respectively while Chironomidae and Tubificidae families were dominant groups. The lake sediment organic matter were 4.3 and 3.2 % respectively. In ichtiology survey identified 5 and 7 species in Mirzakhanlo and Shovir lakes respectively. The hydro-chemical results indicated no restriction for aquaculture activity and according to trophic model both lakes are recognized as meso-eutrophic and eutrophic. Despite of climatic restrictions, the potential for fish production was estimated about 321 and 151 kg/ha for Shovir and Mirzakhanlo lakes respectively that can be improved by using agricultural and the other native facilities.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Aquaculture ; Plankton ; Benthose ; Hydrochemical ; Phytoplankton ; Chironomidae ; Tubificidae ; Survey ; Meso-eutrophic ; Eutrophic
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 76pp.
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    Monitoring of fisheries resources in artificial reefs in east of Kish Island waters (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Artificial reefs are manmade materials deployed under water in order to improve invironment and increase the exploaitation of fishing area. Usage of artificial technic has developed due to increase of world pupolation and need to supply of protein, aim to restoring of natural spicialy rehabilitation of demersal fishes. It has effecte to increase the production in order sustainable exploitation. Coasts and Islands have destruction due to over harvesting from ecosystems and other activities by humans and natural, These caused many aquatic as demersal fishes has endangered in Persian Gulf and Oman Sea. The artificial reef is one way or method that can improve the environment and restore the aquatic. Iranian fisheries has established an artificial reefs area in west of Kish Island. This area has studied during one year, Data of assembeled fishes and physical sampling were collected in seasonal during spring, summer, autumn and winterd. Ther were tow tritment for sampling as artificial reefs site and a control site. Collected data has analyzed and evaluated by SPSS and Exel. The results showed that there was significant difference between the sites and assembled fishes in artificial reefs were more than control site. Consequently the artificial reefs can be a tool and technic to improve the marine environment and increase the production of fishes, especially the demersal fishes.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Coastal Development ; Fish Production ; Marine ; Artificial reefs ; Fisheries ; Population ; Environment ; Demersal fishes
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 72pp.
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    Study on nutrition requirements and effect of different diets on gonadic and somatic growth of beluga (Huso huso) in new condition such as inland brackish water (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Taking into consideration culture of beluga (Huso huso) in new condition such as inland brackish water, it is very important to study nutrition requirements and effect of different diets on gonadic and somatic growth as well as physiological condition. In this research 74 beluga (4 years old) cultured in brackish water earth ponds in bafgh fisheries research station, were selected and distributed in 8 circular cement ponds. Feeding was done in 4 formulated diets with fixed protein level and 4 energy levels (400,425,450,475 kcal/100gr). Samples were biopsied in the first and the end of experiment to determine sexuality and stage of maturation. To study gonad tissues, the hematoxylin-eosin method was used. Results indicated that somatic and gonadic growth index was affected by diets. Growth somatic overlapped in both sexes. Sexual maturation stages were not the same in both males and females and transition from stage II in males was more rapid than females. Considering the results in this study, diet treatments influenced on somatic growth in both sexes and gonadic growth in females. It seems to state of somatic and especially gonadic growth in brackish water is suitable. Therefore, inland brackish water environment can be introduced as a suitable environment cultivation of beluga.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physiological ; Beluga ; Huso Huso ; Brackish Water ; Protein And Energy Requirements ; Gonadic Growth ; Somatic Growth ; Nutrition ; Feeding ; Sample ; Sexuality ; Tissue
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 95pp.
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  • 60
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    Studying molecular 2 species econimic shrimps (P. merguiensis, P. indicus) Northern coast of the Persian Gulf and Oman sea using microsatelitte markers to separating and identificating of their possible populations (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study focuses on molecular investigation of two commercial shrimp species of penaeus family namely as : P. merguiensis and P. indicus in order to find and introduce the genetic differentiations and also probable genotypes for monitoring and managing the genetic resources of populations in three major catch areas in the Persian Gulf and the Oman Sea. Only five out of the eight primers for p. merguiensis and four out of the eight primers for P. indicus produced good amplified PCR products with fixed annealing temperature. The rest of the primers were either not easily amplified or produced nonspecific bands. Seven and six alleles were found to be unique to each of the three populations in P.merguiensis and and two populations of P. indicus respectively. Occurrences of heterozygosity deficiency were found at most loci. These heterozygosity deficiencies in observed heterozygosity in compare to expected heterozygosity may be due to inbreeding, genetic drift and consequences of illegal overharvesting of P. merguiensis and P. indicus in the studied areas as well. Deviation from HWE in both studied species was significant in most microsatellite loci (P 〈0.001). We observed deviation from HWE in most loci with hetrozygosity deficits. The genetic variation results showed that the pairwise Fst values were significant between populations in both species. The assignment test for P. merguiensis revealed high gene flow between Hormoz and Jask and restricted genetic flow between Guatr and Hormoz populations .We observed high gene flow between Hormoz and Jask populations for P. indicus. It seems that the changes in immigration patterns of populations between Hormoz, Jask and Guatr areas in both species are depend on the influence of Persian Gulf currents or the life cycle of studied species. Alternatively, the presence of ecological barriers such as mangrove forests may result in restricted genetic flow between Guatr and both Hormoz and Jask populations.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial ; Ecological ; Microsatellite markers ; P.merguiensis ; P. indicus ; PCR ; Molecular ; Species ; Genotype ; Population ; Temperature
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 84pp.
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    A survey on effects of shrimp aquaculture on the coastal waters of Bushehr (Helleh region) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This survey was designed in the Helleh region, to understand effects of aquaculture industry on coastal waters of Busher, in 2000. Sediment and water samples were collected from effluent canal, influent canal and sea during the 7 month period (harvest and post harvest season). The variations of selected water quality parameters were controlled monthly. Results show that, in effluent canal, estimated parameters of water was higher than other stations every month, and tend to decreased after being discharged into the sea and got closed to normal level. Comparison of above data with permit able range of municipal and aquaculture waste and comparison of present data with data of normal condition of region, show that, aquaculture industry of Helleh region has not had any obvious negative effect on the coastal waters of Bushehr, in the culture year of 2000.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Aquaculture ; Sediment ; Samples ; Culture ; Coastal waters ; Shrimp ; Parameters ; Water quality ; Comparison
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 65pp.
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    The Study of nutrition and feeding position of shrimp, cultured in IRAN (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The culture of Iranian Shrimps began in Bushehr in 1372. Early the green or the pink tiger shrimp (Penaeus semisulcatus) which were found in most habitats of the Persian Gulf and Oman Sea were considered in breeding and reproduction, but due to reproduction difficulties, it was rather replaced by the Monodun imported species, then the production of the white shrimp Metapenaeus affinis and Then P.merguensis in some southern areas of the country such as Hormozgan has began in small scale,but none of these species couldn't meet the economical needs of the consumer society and they were not indelible and dominant enough in the shrimp aquaculture industry of the country until breeding of Indian White Shrimp (Fenneropenaeus indicus) has began in large scale in the provinces of Khuzestan and Bushehr, which are seen as the heart of shrimps reproduction and breeding, and in Hormozgan and Sistan. the incidence of white spot viral syndrome (White Spot Syndrom Virus) led to the import of the western white leg shrimp from the USA (P.vannameii) by the Iranian Fisheries Research Organization (IFRO) in 1383, at the present all southern and northern breeding farms of the country (fundamental measures has been carried out in line of shrimp reproduction in Gorgan province in 1386) has put the breeding of this shrimp species as the single breeding species at top of their agenda. The subject of feeding the breeding shrimps is widespread and regarding to the non-proprietary species there are still some species which contain high protein than the other species in studying the different shrimp species requirements. In Iran due to the scarce factories producing the shrimp's food, the alimentary compound of the breeding shrimps during industrializing years of this type of breeding even after the non-aboriginal western white leg shrimp species being inclusive was stable and through different biological processes including: Naplies which feeds from its yalk and by entry into zoa stage start eating only small-sized phytoplankton. And by entry into the stage between zoa and mysis it feeds from phyto and zooplankton simultaneously and entering the post-larva stage it stars sarcophagi. and after 15 post-larva stage entering the growth and transition stage to earthen ponds feeding by concentrated industrial foods in large and small packages depending on young and adult mouth and due to feeding requirements of every stage the alimentary compound is nearly as follows: Digestible protein, energy, fat, carbohydrates, vitamins and minerals will start and the final product will be released in market Or they will be used in the later years of laying eggs and feeding for brood stock. In feeding section the details of every stage and their food's nutritional needs at each stage and will be fully described.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Economical ; Shrimp ; Food components ; Biological processes ; Nutrition ; Feeding ; Culture ; Tiger shrimp ; Penaeus Semisulcatus ; Breeding ; White shrimp ; Metapenaeus affinis ; Aquaculture ; White Spot Syndrome Virus ; Phytoplankton ; Zooplankton
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 178pp.
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    survey on achieving recombinant DNA vaccine (live delivery) against streptococcusis for Rainbow trout (Onchorhynchus mykiss) Immunization (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The main purpose of this study was survey on achieving recombinant DNA vaccine (live delivery) against streptococcusis for Rainbow trout (Onchorhynchus mykiss) Immunization. Initially, a total of 515 samples were collected from the head kidney of diseased fish (weigh 50_ 200g) in 72 farms of 8 provinces. Approximately, 40% (206 samples) of specimens were infected to Streptococcus species. Then were isolated 172 DNA samples and consequently, five pathogenic species have been identified, including S. iniae, S. faecium, S. agalactiae, S. dysgalatiae, and S. uberis. The enzyme phosphoglucomutase (PGM) has recently been discovered to play an important role in polysaccharide capsule production and virulence in S. iniae. Therefore, was initially isolated S. iniae and cloning phosphoglucomutase gene. Then, the PGM gene was amplified successfully and cloned in pTZ57R cloning vector. The recombinant plasmid was sub cloned into pETD uet-l expression vector by restriction enzymes and confirmed by PCR. Meanwhile, for amplifying simA and cpsD genes were used universal primers pNZ8148 and special for simA and cpsD genes.The recombinant bacteria Lactococcus lactis (NZ9000) was used for transformation the plasmid into Lactococcus lactis. Vaccination was performed by oral, bath and injection (peritoneal) methods. The efficiency of g2 was better than g1in these three methods and all of groups. The determination of IgM level, or detection of anti S. iniae antibody was carried out by using ELISA. The results revealed that there was a significant (p〈0.05) difference between the level of IgM in all three methods and experiment groups compare to control group. The results of challenge of vaccinated fish with S. iniae showed that fish RPS in all of groups except group 3 (42.63 percent) were more than 50 percent while, in control group was 21.43 percent. The highest fish RPS was belong to group 11(61.25 percent) and statistical analyses revealed that significant (p〈0.05) difference between fish vaccinated RPS, compare to control group.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; DNA ; Live delivery ; Rainbow trout ; Onchorhynchus mykiss ; Immunization
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 82pp.
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    Production of the burger combination kilka-silver carp and evaluation the nutritional value and shelf life it during cold storage period (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Kilka fish burger and silver fish is product of minced fish meat kilka and silver carp are mado of flavors , fillings, vejetables and spices.this fusion can be made on a toasted ( fried or raw ) and be marketed. The project was to replace the effects of different amounts of kilka fish insted of meat silver carp burger in preparing the consolidated on acceptance and qualitative changes in the past 5 months were examined and selected the best treatment for the industrial manufacturing industry in presented .Therefore , the four treatments with a variety of burger meat mixed with kilka and silver carp have been defined and the sensory evaluation were prepared . Based on statistical tests , selected treatment 3 ( kilka hundred percent ) in terms of flavor and color is in the highest rating . Also , the control treatment in term of taste , odor and color is in second priority. It is noteworthy that treatments 1 and 2 , in the next priority is accepted . Goals of this plan is consolidation of kilka and silver carp in preparation of consolidated burger in order to financial purpose in final product. Chemical, microbiological, sensory evaluation and free fatty acie of the product during the 5 months storage at -18 c is illustrated that, the product is maintained its quality during the entire sensory and chemical paraments.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Chemical ; Microbiological ; Consolidated burger ; Kilka fish ; Silver Carp ; Qualitative evaluation ; Freezing ; Fatty acids
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 116pp.
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    Assessment of some specific and nonspecific immune responses of beluga (Huso huso) following exposure to organophsphte diazinon (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Nowadays, the offspring of sturgeon species in the Caspian Sea is under danger because of biological and non-biological impacts such as pollution and illegal catching as well as dams obstacles of fish migration to the upstream of the rivers for the spawning. One of the most practical way to protect and maintain the natural stocking of these valuable species in the sea is artificial propagation and releasing of the produced larvae into the sea and the entering rivers as Iran Fishery Organization is currently producing about 22 million larvae per year according to the forth national plan of the country. However, protecting these natural resources of these species from the toxic chemicals is a critical issue because of high level pollution of their natural environment. In this research work an attempt was made to evaluate the toxicity of diazinon and its effect on some specific and nonspecific immune parameters of these sturgeon species in particular great sturgeon in order to give some recommendations for improving of their natural environment. A number of 300 fish weighing 12±2 g from great sturgeon obtained from sturgeon farms in Golestan states were used. Fish were transported to the Caspian Sea institute of ecology and were kept in 2000 L tanks with well aeration. Fish were fed commercial feed containing Kilka meal. The water quality parameters consisting of NO2, NH3, pH, DO and hardness were 〈0.1, 0 mg.l, 0.02mg/l, 7.9, 7-9/1 mg/l, and 145 mg/l, respectively. The acute toxicity of diazinon was assessed in beluga (Huso huso) and some of hematological and biochemical parameters of the survival fish examined. The obtained LC50-96 hours was 5.63 mg/l for Huso huso. Also, the obtained results showed that RBC, HB and PCV were significantly lower in the survival fish than the control fish. However, level of MCV in test groups was higher than control groups (P〈0.05). Also, leucocytes count level was different between the test and control groups. Also, no difference was observed in level of enzymes of ALD, AST, LDH and ALP between test and control groups, while levels of total protein and glucose in test groups were lower and higher than control fish, respectively. IgM of these species were purified and partially characterized using affinity chromatography and SDSPAGE methods, the obtained results showed than all fish species possess and IgM like protein with a molecular weight of 870KDa. This IgM showed to have heavy chains with 77-84 KDa and light chains with 28-30 KDa. The chronic/sublethal effect of this diazinon was assessed in great sturgeon juvenile and hematological and biochemical changes, leucocyte population size, lysozyme activity, chemiluminuscence (CL) response, antibody titration and histhopathological change were studied in beluga (Huso huso) weighing 450±50 g in the present of Antigen of Aeromonas Hydrophila as a single intraperitoneal injection at 1x107 cell per fish and thereafter a chronic exposure to organophosphate, diazinon at concentrations of 1,5 and 10 mg/L as a 48 hours bath and sample collected on day one and every week interval upto 22 days provided at 22±1?C and acceptable water quality condition. Results of erythrocyte profile in fish treated with diazinon generally showed significantly decrease of RBC, HCT (P〈0.05) compare to control fishes. While there was no significant difference (P〉0.05) in the values of MCH, MCV and MCHC between these groups. Compare to control group (group A) the values of white blood cells and lymphocyte were significantly lower in the exposed fish to diazinon (groups of C, D, E, F, G and H) while, the level of neutrophile and eosinophil was higher than control one (P〈0.05). No significant differences was found in values of monocytes and immature neutrophiles between control group and these groups (P〉0.05).Furthermore, fish treated with diazinon showed a higher levels of asparate aminotransferase (AST), alkaline phosphatase (ALP), alanine aminotransferase (ALT), lactate dehydrogenase (LDH) in the early stage of post-exposure, compare to control fishes, while the level of these enzymes was lower in this group for the rest of experiment. Also, fish treated with Antigen-diazinon showed generally lower and higher levels of total protein and glucose concentrations in blood plasma, respectively compared to fish untreated(control) (P〈0.05).The level of cholinesterase in fish treated with diazinon bath generally lower than control group(P〈0.05).The level of lysozyme in liver of groups B,D,F,G and H were significantly higher (P〈0.05) than group A up to 2 weeks post-treatment and then it insignificantly reduced to lower levels until week 3 post-exposure. Also, kidney lysozyme contents were significantly higher (P〉0.05) in groups of B,F,G and H than group A up to 2 weeks post-treatment and then was lower for the rest of the experiment. The level of spleen lysozyme in groups of B,G and H was also, higher than group A for the first 2 weeks post-treatment and, then it reduced to below levels measured during the rest of experiment (P〉0.05). Lysozyme level of sera samples were significantly higher (P〈0.05) in groups of B, D, E, F, G and H than group A in the one week post-treatment. There was significant difference in the lysozyme contents of tissues of liver, spleen and serum between groups of A and E,F,G,H(P〈0.05). Mean spontaneous CL response in groups of diazinon bath were significantly lower than group A throughout the experiment (P〈0.05). Maximum peak was found in group D one day post-exposure, while the minimum peak was found in group E throughout the experiment. The antibody titration in groups of treated with diazinon bath generally lower than control group (P〈0.05).but the antibody titer in group B that treated with Antigen without diazinon bath was higher than the other groups. The histopathological effects of diazinon on the liver, kidney, spleen, gills, nostril and barbels of gain sturgeon examined under light and electron microscope, showed that diazinon caused severe damage to the cell structure such as congestion of blood vessels, hemorrhage, cellular infiltration, pyknosis of cells nuclei, vacuolar degeneration and general necrosis in the tissues of kidney, spleen and liver. There were also degenerative changes of interstitial tissue, detachment of tubular basement membrane in kidney. In the gills, hyperplasia and fusion of secondary lamellae, separation and sloughing of epithelium from the underlying basement membrane were also observed In conclusion, diazinon at toxic and sub lethal concentrations is able to seriously affect the sturgeon immunity resulting in suppression of fish immune system and making fish susceptible to both non-infectious and infectious diseases.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Non-biological ; Chemical ; Biochemical ; Histhopathological ; Sturgeon ; Huso huso ; Diazinon ; Immune system ; Blood factors ; LC50 96h ; Migration ; Spawning ; Larvae ; Kilka ; Toxicity ; Aeromonas hydrophila ; Lymphocyte ; Gills ; Beluga
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 154pp.
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    Statistical and biological survey of sturgeon fish (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Statistical ; Biological ; Survey ; Sturgeon fish
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 57pp.
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    Possibility of using fresh water rotifer Brachionus calyciflorus for feeding Persian sturgeon Acipenser persicus (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Acipenser persicus, one of the native Species living in the southern part of the Caspian Sea, has high Percentage of larval mortality. Therefor to decrease the rate of mortality of larvae survival and to increase to regenerate properly during the active feeding process of fish larvae, while under artificial reproduction they were fed withe fresh water rotifer. Four types of feeding treatments were applied as follow :Treatment 1: Similar to normal process , first withe Artemia cyst then withe Daphnia Treatment 2: Mixture of Artemia, Rotifer and Daphnia; Treatment 3 freshwater Rotifera ;Treatment 4: fresh water Rotifer enriched with Vitamin C (Ascorbic acid- 6- Palmytat ).Three replicates were used for each treatment. In the process of each observation 45 larvae in containers withe 100 liter capacity filled with 30 liters of water , after 8 days of external feeding process, were inspected closely, during which , they were under biometric measurement once every two days. Larvae were fed Four times a day at a rate of 25 % of their body weight. The average temperature estimation was 22/5 ±0/5 centigrade, pH of water being 8/5 ± 0/1 while Oxygen proved to be 9/58 ± 0/2 mg/l . At the end of the observation, the profill fatty acids of the remains were studied .The growth factors, the mouth size of the larvae and the expansion of the mouth size compared to the total length of the larvae during the whole observation were inspected. Credibility of data designated was examined by Shapiro Wilks test. Specific growth rate (SGR), weight growth (WG) and feed conversion ratio (FCR) were contemplated by one- way analysis test, and significant difference Tukey's test. The most notable diversity was evident between treatment 2 , whose indicative factors were in the following order : 4/ 65 ± 0/06, 45/18 ± 0/66, 4/48 ± 0/07 and treatment 4 whose indicative factors showed the following results: 10/47 ± 0/04, 124/42 ± 0/62, 1/51 ± 0/008.For the determination of fatness rate and weight gains, Kruskal Valis and Man vit ni test were used .In this part of study , the highest diversity fatness appeared to be between treatment 4 ,reflecting 0/79±0/07 and treatment 2 showing the result 0/62±0/05.The highest gain was related to treatment 4, whit the rate of 99/33 ± 0/68 mgr and the lowest gain occurred in treatment 2 white the rate 62/36 ± 0/65 mgr . This study also revealed that, the survival ratio connected with treatments 3 and 4 , compared treatments 1 and 2, were significantly different. The profile of fatty acids also showed much higher percentage of PUFA and HUFA in treatments 3 and 4 , than those in other treatments. Furthermore Brachionus calyciflorus proved to be a proper food supply for larvae. Therefore by building suitable pools next to the work side, other kinds of species fresh water rotifer could also be used as food improvements for feeding larvae.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Brachionus calyciflorus ; Acipenser persicus ; Fatty acid ; Larvae culture ; Vitamin C ; Larval survival ; Species ; Mortality ; Feeding ; Artemia ; Cyst ; Ascorbic acid ; Oxygen ; Growth ; SGR ; FCR ; Fresh water
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 78pp.
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    Genetic characterization of Vimba vimba persa in southern part of the Caspian Sea using microsatellite marker (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Population genetic structure of Vimba vimba persa was investigated using microsatellite markers from 4 regions along the Iranian coastline of Southern the Caspian Sea (Anzali lagoon & havigh River in Gilan province, BabolRoud River in Maz&eran province & GorganRoud River in Golestan province). Genomic DNA from 121 specimens was extracted from fin tissue by phenol-Chlorophorm method & PCR reaction was accomplished with 17 microsatellite primers, out of 17 microsatellite primers 14 loci were amplified, in which 10 of them were amplified with reasonable polymorphism & 4 were monomorphism. Totally 302 alleles were identified on average 7.5 Observed & expected heterozygosity averages were 0.80 & 0.77 respectively. Most cases significantly deviated from Hardy-Weinberg equilibrium (p 0.01). The estimation of Fst (p 0.01) revealed significant population structuring & estimate four population of Vimba vimba persa is identified in the Caspian Sea. These studies were to apply & develop population genetic approaches to assist conservation, sustainable harvest & restocking of these populations.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Vimba vimba persa ; Population ; Genetic ; Microsatellite ; DNA ; Genomic ; Specimens ; PCR ; Equilibrium ; Restocking
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 61pp.
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  • 69
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    Biological aspects of Sepia pharaonis in the Bahrekan waters (NW Persian Gulf) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The biological aspects of Sepia pharaonis was studied during years 2006-07. The studied area restricted to the Bahrekan in Khouzestan province covering the depths of 2 up to 25m. The sampling methods were gillnet and bottom trawl. A total of 310 specimens collected, of which there wasn’t found any cuttlefish in the study area from July to October (5 months). The collected samples were transferred to the laboratory ashore for further biological measurements consist of: Mantle length, Body weight, sex determination. Gonado-Somatic Index, and determination of Spermatophoric Index, Spawning season, Food preference, Maturity stages and chemical analysis for food value determination. The results showed that the overall sex ratio is about M:F= 2:1 with percentage of 67.41% for males and 32.50% for females. Males are significantly bigger than females with average mantle length (ML) of 233.3 and 269.3 mm for female and male, respectively; with body weight of 1102.3 and 1450.6 g. The mantle length body weight relationship was found W=0.001 ML 2.540 (R2= 0.92) Female as: W= 0.0015 ML 4797 (R2= 0.93) male From point of feeding, the food preferences results indicated that fish is considered as main food, crabs as minor food and other marine organisms such as bivalvia and gastropods as random food. The highest vacuity Index (CV) and empty stomachs was determined for March-April and the lowest value was is December. Also, the maximum GSI was estimated for March-April months in which showing coherrances with the lowest food preference. The maximum spermatophoricfilaments were 856 and 45 for male pharaoh cuttlefish with mantle length of 300 and 185 mm, and on the other hand this values for fecundity were estimated 1589 and 53 for female specimens with 254 and 198 mm mantle length. The spawning season occurs in April- March in which accompany with migration of pharaoh cuttlefish towards shallow waters. The fishing season would be in this period in w.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Chemical ; Sepia pharaonis ; Gillnet ; Sampling ; Specimens ; Weight ; Sex ; Gonado-somatic index ; Spawning ; Maturity ; Female ; Male ; Bivalvia ; Gastropods
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 85pp.
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  • 70
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    Study of site selection for Carp and Trout fish species for responsible aquaculture possibility (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This survey carried out from 2012 to 2013 to study of suitable site selection for carp and trout fish species for responsible aquaculture possibility by data collection and literature study.During the survey ecological factors including physical and chemical factors,geological factors including topography and type of soil,biological factors including selection of species and control of invader animals,climatic factors,geographical factors and pollutant including heavy metals,agricultural pesticides Surfactants and crude oils were recognized.Also in comparing with standard levels suitable rate of each important factor in aquaculture were studied.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Warm Water ; Fish ; Cold Water ; Ecological factors ; Biological factors ; Aquaculture ; Survey ; Carp ; Species
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 33pp.
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  • 71
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    LHRH-A Implantation on reproductive cycle of Iranian sturgeon (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The Iranian sturgeon ( Acipenser persicus) is one of most commercially important sturgeon species in the Caspian Sea and it is considered as an endemic sturgeon of the south part of the Caspian sea. Most of its populations distributed around the south coast of the sea and also the most Iranian caviar production belonged to this species. Due to overfishing, degradation of the rivers conditions as the natural reproduction places the stocks of the fish is decreasing and that is why the Islamic republic of Iran releases millions of its fingerlings to the rivers that end to the sea to stock restoration. With regard to the high expenses of the artificial propagation and fingerlings production, finding and creation of better output will play an important role to decrease the production expenditures. Now days, the decrease in the natural stocks of broodstocks and also the low quality and immature caught broodstocks are the fundamental problems which the industry of sturgeon mass production faces. These not fully matured brooders do not response the hormonal induction processes at the sturgeon hatcheries (because they do not reach to final maturation and some of them having polarization index greater than 10 ) and large numbers of the caught and transported brooders to the hatcheries will not produce any fry ( as the data distributed and published by the sturgeon hatcheries about the production techniques). The main objective of the research study is to apply a new method for artificial reproduction (LHRH-A implantation) to gain the best output from the Iranian sturgeon brooders caught and transported from the Caspian Sea which will be done for the first time on sturgeons and there is not still any report of the application of this procedure ( LHRH-A implantation )over these kinds of fishes. Most published report on the method belonged to the teleosts.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: LHRH-A ; Implantation ; Iranian sturgeon ; Acipenser persicus ; Species ; Population ; Caviar ; Species ; Fingerlings ; Artificial propagation ; Broodstocks ; Hatcheries ; Brooders
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 93pp.
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  • 72
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    The study of possible biotechniques and normative to production some species of Anostraca (Phallocryptus spinosa) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This project was carried out in order to determine the hatching conditions and laboratory culture methods of Fairy Shrimps ( Phallocryptus spinosa). Physico- chemical factors and phytoplankton of natural habitat of this organism was investigated in Khasellou region around Azarshahr – East Azarbaijan province. The results showed that occurance and growth of fairy shrimps in their habitates were beginning from early Aprill and their survival was decreased with increasing temperature, precipitation and increasing the salinity of their culture medium. Then they disappeared. Their habitat phytoplankton contained 3 phylla and 10 genera, from which green algae enjoyed the greatest density in May. The pool salinity was around 20-17 g/l , when metanauplii was observed in early spring. In the pool containing and without fairy shrimps the oxygen concenteration was high (9 mg/l) and low (2.9 mg/l ) , respectively . In 9 prawn ornamental fish genera, feeding with fairy shrimp showed a significant higher fecundity and hatching percentage compaired to manual diets (cow liver, spinach). In all groups fed with fairy shrimp the duration of spawning time were reduced from 15 to 8-10 days and the color was enhanced. The means of cyst number per captured female also, cyst , decapsulated cyst and Naupilli diameters were mesured 142.9±19.0 cysts , 273.2 ± 4.9 µ , 242.4± 3.8 µ and 542.6 ± 27.0 µ., respectively . The hatching rate was increased by reducing temperature and salinity of their culture mediums from 25 to 15 ◦ C , and 28 to 18 g/l, respectively.The highest hatching was observed on 5 th day at 15 ◦ C and 18 g/l (5, 33 %). In addition, low but multiple hatching was observed. Therefore , water temperature and salinity affected hatching rate in this species.The hatching success of Phallocryptus spinosa cysts was beter when collecting cysts together with dry sediments of their habitat without separation sensetive cysts . In addition to cold keeping and freezing, the hydration – dehydration method caused more diapause deactivation for hatching induction. The laboratory results revealed that the survival of fairy shrimps were highest at 15 ◦ C (42%) and lowest at 25◦ C (26%), respectively. Also, their life was inhibited in 30◦ C.In different salinities, the mean survival rate were 26% (Salinity = 15 g/l) and 20% (Salinity = 25 g/l), respectively. The mean survival percentage of Phallocryptus spinosa cultured in natural habitat water (64.3%) was higher than aerated tap water (23, 3 %). Also, feeding with Nanochlorepsis caused higher survival rates. On the other hand, Beakers yeast caused higher mortality rates. Therefore , regarding to relatively high sensitivity of these species to physico – chemical and nutritional conditions of their culture medium, it is better to culture these species with expantion of their natural habitat in order to preserve their biodiversity , culture and increase stocking density with regard to environmental considerations .
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physico-chemical ; Environmental ; Fairy Shrimps ; Phallocryptus spinosa ; Hatching ; Culture ; Biotechnique ; Species ; Anostraca ; Phytoplankton ; Growth ; Temperature ; Salinity ; Phylla ; Feeding ; Survival rate ; Mortality ; Biodiversity
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 104pp.
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  • 73
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    Preliminary survey of the hydrology and hydrobiology of Goetar Bay (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Preliminary ; Survey ; Hydrology ; Hydrobiology
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 108pp.
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  • 74
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    Survey on White Spot Virus infection in wild shrimps and crabs in Bushehr province costal waters (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: After severe mortality due to white spot disease incidence in cultured shrimps of Helleh grows out farms, disease spread to Delvar,Mond, Boeyrat and Bandar Rig sites in Bushehr province during 2005. Many crustaceans keep this virus in the body, act as a carrier, and can spread of the infection. In order to investigate status of contamination of wild shrimp and crab's population to white spot virus in Bushehr province waters (north of Persian Gulf), samples were collected and tested by Nested PCR for detection of WSV from estuaries and input and output channels water around the Helleh, Shif and Mond sites during 2007 and 2008. Total tested shrimps were 401 peaces, includes green tiger shrimp (Penaeus semisulcatus) 220 pieces, white shrimp (Metapenaeus affinis) 181 pieces, also total tested crabs were 292 pieces includes Ocypode rotundata 68 pieces and Portunus pelagicus 224 pieces. All the samples showed negative results of WSV contamination. However, it can never be sure that the population is free from WSV unless we collect a random sample of 300 pieces from each species and test them individually for WSV. Therefore, we will be confident up to 95% that the wild sources in that area have no prevalence of 1% or upper WSV contamination.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: White spot disease ; WSV ; Shrimp ; Crab ; Nested PCR ; Survey ; Coastal waters
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 55pp.
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  • 75
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    Investigation of Physical and Chemical Properties of Coastal Waters of Hormozgan Province (from Dar Sorkh to Basaiydo Zon) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Without abstract.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Investigation ; Physical ; Chemical ; Coastal Waters
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 68pp.
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  • 76
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    Improvement the texture properties and acceptability of Silver Carp Investigation on possibility of burger by addition pectin in the fish burger material (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this study the physical properties of silver carp burger over a period of six months at a temperature of -18 ċ were studied using pectin. Indicators such as hardness texture,juiciness, flavor and overall acceptance of the product containing. The product were evaluated using qualified assessors، the microbial,chemical markers to evaluate the qualitative change such as peroxide treatments, total volatile nitrogen bases ، total count of bacteria and examined psychotropic of tests six months of treatments carried out on a monthly basis. The results indicate that the addition of pectin 0/3 percent of total admissions acceptance of burgers tissue was obtained and significant differences are. The chemical test results were also increased with storage time burger in refrigerators -18 degrees. Range of volatile nitrogen bases out of 15.2±1.2 at the time of 26/5±1.17 mg/100, the peroxide from 0.6±0.61 to 3/56±0.6 meq/kg of oxygen was. Thus despite a significant increase in indicators of physical Chemical and sensory evaluation of texture analysis. In the past six months storage period of -18 degrees, burger productive uses of pectin 0/3 percent of the limit between acceptable and will was.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physical ; Microbial ; Chemical ; Burgers ; Fish ; Silver Carp ; Storage ; Quality ; Changes ; The shelf life ; Texture ; Pectin ; Nitrogen ; Bacterial ; Psychotropic
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 42pp.
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  • 77
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    Study of consumed water quality and output effluents of active shrimp culture farm at Choebdeh zone in Abadan (2018)
    Iranian Fisheries Science Research Institute | Ahvaz, Iran
    Details
    Publication Date: 2021-05-19
    Description: By growing the population fishing and use water resources were developed and cause impacts on natural resources. ...
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Population ; Resource ; Fishing ; Water quality
    Repository Name: AquaDocs
    Type: Report , Not Known
    Format: 147pp.
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  • 78
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    Survey of diversity, distribution, abundance and biomass of macrobenthic fauna in the southern Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Sediments samples were collected using Veen Grab Sampler (0.1 square meter) at 8 transects namely Astara, Anzali, Sefidroud, Tonekabon, Noshahr, Babolsar, Amirabad, Torkman in the southern of Caspian Sea. Five stations were selected at 5, 10, 20, 50 and 100 meter depths in each transect. Sediments were sampled triplicate at each station. Samples also were collected during four seasons (spring (May), summer (July), fall (November) and winter (January)) in 2009. Results of this study showed that species composition of Macrobenthos consisted of 32 species which belonged to 7 families of Polychaeta, Crustacea and Bivalvia at studied area. In addition, Oligochaeta identified in “Class”, Chironomidae considered in Insecta categories “Family” and Streblospio spp. (Polychaeta) was recognized in “Genus”. Gammaridae and Pseudocumidae of Crustacea with 12 and 10 species had the highest species diversity compared to other groups, respectively. Polychaeta was consisted 75.5 percent of total abundance of macrobenthos which the major abundance (equal 62.4% of total abundance) were belong to Streblospio spp. from Spionidae family, while its biomass was equals 5.11% of total macrobenthos. In contrast, Cerastoderma lamarcki species from Bivalvia Class with only 1.7% of total abundance of macrobenthos allocated 69 percent of total biomass. In the southern of Caspian Sea, average total abundance was significantly less at 4 western transects (Astara, Anzali, Sefidroud, Tonekabon) compared to 4 eastern transects (Noshahr, Babolsar, Amirabad, Torkman) (p〈0.05). The highest average abundance of macrobenthos (10655±1246SE ind/m2) was observed at transect of Torkman, and lowest value (4032 ± 686SE ind/m2) was recorded at transect of Sefidroud (p〈 0.05). Generally, minimum species diversity were obtained at 20 m depth in all transects and the maximum value was observed at 5 m depth in most of transects (p〈0.05). In contrary, maximum average abundance of Macrobenthoses was at 20 m depth in transects of Anzali, Sefidroud, Tonekabon, Nowshahr and Amirabad compared to other depths. Macrobenthoses abundance average in 5 m depth (except Astara and Torkman) was less than other depths in 6 transect (p 〈 0.05). Total average abundance and biomass of macrobenthos was 5976±583SE ind/m2 and 43.675 ± 11.402SE gr/ m2, respectively. Maximum and minimum of abundance of macrobenthos were observed in summer (7714±778 ind/m2) and winter (4071 ± 340 ind/m2), respectively. Maximum and minimum of biomass of macrobenthos were obtained in fall (50.271±13.258SE gr/ m2) and in summer (35.123 ± 8.903SE gr/ m2), respectively (p〈 0.05). Percent of total organic matter (TOM) were low in 5 and 10 m depths and increased toward offshore depths. TOM percent was 2.06±0.11SE at 10 m depth and increased to 4.62 ±0.17SE in 100 m depth. Percent of silt and clay (grains size less than 63 micron) had positive significantly correlation with percent of TOM (p〈0.01).While they had negative significantly correlation with percent of sand (grains size between 63 and 1000 micron) (p〈0.01). Percent of silt and clay like organic matter, had ascending trend toward to depth increased and varied from 44.4 ± 4.06SE percent in 5 m depth to 96.5 ± 0.59SE percent in 100 m depth. In contrast, percent of sand decreased toward depth and varied from 54.5 ± 4.13SE percent in 5 m depth to 2.8 ± 0.53SE percent in 100 m depth. Result of current study showed that total abundance of macrobenthoses had positive significantly correlation with TOM percent (p〈0.01) and silt/clay percent (p〈0.05). Abundance of Oligochaeta had positive significantly correlation (p〈 0.01) with TOM and silt/clay percent. Two groups of Polychaeta, Gammaridae and Cerastoderma lamarcki had negative significantly correlation with TOM and silt/clay percent (p〈 0.01), and every four aforementioned groups had positive significantly correlation with sand percent (p〈 0.01). Overall, different correlation between abundance of various macrobenthos groups and TOM percent and type of grain size of sediment could be related to fluctuation of abundance of various macrobenthos groups at difference transects and depths. On the other hand, in study area were occurred simultaneously some phenomena such as increased abundance of Oligochaeta and Polychaeta, dominance of Streblospio Genuse (Polychaeta group), and decreases abundance of Bivalvia and appearance of Menemiopsis leidyi which need to study more and monitoring of this area.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Macrobenthos ; Diversity ; Distribution ; Abundance ; Biomass ; Survey ; Fauna ; Sediments ; Samples ; Streblospio spp. ; Cerastoderma lamarcki ; Menemiopsis leidyi
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 105pp.
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    A survey on some biological aspects of spiny lobster Panulirus homarus for optimizing fishing season in Sistan - o – Baluchestan provnce (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Research project was conducted on some biological aspects of lobster in Oman Sea in the years1385-86. During the project some parameters such as length distribution, spawning peak, length (Carapace) at first maturity, the length at which 50% of the lobsters were found to be mature sexually, sex ratio, relative frequency index and population dynamics parameters were examined. Quantitative factors and catch composition of lobster including the amount of catch in terms of weight and number of ovigerous-female, under-sized specimens and so were compared by monthly. According to the results of present study caught specimens were male with carapace length of 22 and 110 mm respectively. The smallest ovigerous female was taken as 46mm CL when length at first maturity was estimated to be 69-70mm. the male: female ratio was 0.7: 1.3 for the whole year. A closed fishing season for the species is proposed during spring and September and October in Oman Sea. A large amount of the catches for the all sampling months came from the under-sized specimens, consist of 50 to 85% of the total catch. Therefore, presence of these small length groups have direct effects on time of closing season. Population dynamics parameters were calculated as follows: K=0.57 year, L∞= 103mm and Ǿ = 8.69. Total mortality (Z), natural mortality (M) and fishing mortality (F) coefficients were calculated as 2.73, 0.87 and 1.86, respectively. Exploitation ratio for the whole population was 0.681, indicating an overexploitation of the species. Based on the available data, the recruitment pattern for lobster was obtained for two season including spring (major) and autumn (minor). Catch per unite effort (CPUE) was calculated as 0.908 kg/Cage/day which was higher in comparison with two other areas including Ramin and Chabahar. Examination of CPUE for a 10-year period showed a decreased trend and the reduction for the year 1386 was about 30% when compared to the data from the year 1375. Moreover, the mean length during 1369-70 to 1385-86 (present study) decreased for the three areas including Pozm, Ramin and Chabahar, so that the carapas length decreased up to 10 mm in length. This sudden decrease in mean length during the 10-year period should be considered as a serious precariousness for sustainable exploitation of lobster in Oman Sea along Sistan and Baluchistan province.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Survey ; Spiny Lobster ; Panulirus homarus ; Fishing ; Spawning ; Length ; Maturity ; Sex ratio ; Female ; Specimens ; Species ; Mortality ; Population
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 68pp.
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  • 80
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    Survey on health and disease status of ornamental fishes in Golestan, Mazanderan and Khorasan Razavi provinces (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The project of survey on health status of ornamental fishes in Mazenderan , Golestan and Khorasan Razavi carried out with association of 5 , 2 and 6 centers in orderly. The main aims of this survey were identification and distribution local infectious of epizootic diseases , identification positive and negative points, offers management applicable guidelines to prevents of diseases.The results of survey showed that important virologically agent identified was Lymphocystis virus in Angel fish. Also, main bacteriologically agents were Aeromonas spp, Pseudomonas spp and vibrio. As well as, from the fungal agents that were identified can mentioned to Aspergilus flavus , Mucor , Penicilium and Alternaria. The important parasitic agents also were Trichodina , Ichthyophytrius , tetrahymena , Dactylogyrus, Gyrodactylus and capillaria. In the health management part of this survey positive points include non application of antibiotic and cooperative of hatchery directors with executive organizations to sampling examination periodically. The negative points were non familiarity and training about fish disease, werenot technical director, prepairing feeds without familiarity with principals of diets, non quarantine units before fishes entrance to production cycles, non existens good food storage rooms, non existens foot bath in entrance gate to the hatchery systems and ets.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ornamental fish ; Disease ; Health management ; Survey ; Aeromonas spp ; Pseudomonas spp. ; Vibrio ; Aspergilus flavus ; Mucor ; Penicilium ; Alternaria ; Trichodina ; Ichthyophytrius ; Tetrahymena ; Dactylogyrus ; Hatchery
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 99pp.
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  • 81
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    Histopathological changes of liver, kidney and gill in warm water fishes (Cyprinus carpio and Ctenopharyngodon idella and Hypophthalmichtys militrix) in Khouzestan province during winter season (2018)
    Iranian Fisheries Science Research Institute | Ahvaz, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this research 90 fish (30 common carp, 30 grass carp, 30 silver carp) respectively with average weight of 8.5+0.7 ...........
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Fish ; Chemical ; Histology ; Gill
    Repository Name: AquaDocs
    Type: Report , Not Known
    Format: 98pp.
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  • 82
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    Identification and density determination of jelly zooplanktons in Khuzestan coastal waters (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Recently, we have been encountered to increasing jellyfish biomass in the world tropical coastal waters and due to their role in ecosystem food web, can be made direct and indirect effects on marine stocks and causing problems for fisherman’s communities. Now, the number of studies on this animal groups and factors which caused to jellyfish bloom has been increased. Present study was carried out for identification and density estimation of jellyfishes in the East and West coasts of Khure-Musa canal in Khuzestan coastal waters in North-West of Persian Gulf. Monthly samples were collected by two sampling methods from randomly sites in studied area in day light during February 2007 to January 2008. Small jellyfishes were collected by using 500 micron mesh net and density was calculated as number per 10 square meters. Large jellies were collected by using shrimp trawl net and quantity measurements were done by swept area methods. Totally, 18 species including 9 hydromedusae, 2 Scyphomedusae, 3 Siphonophorae and two Ctenophores were identified. Generally from 5357 separated small jellyfish, 56.6 % was from East and 43.4 % was from west coasts. Ctenophore, Pleurobranchia (31%) and then the Hydromedusa Eiren hexanemalis (22%) were the most abundant taxa. The maximum number of jellyfish (1080 per 10m2) was observed in western coasts in July and then decrease in summer and autumn. In contrast to Eastern coasts, the highest frequency (655 per 10 m2) was observed in western coasts in September. Two peaks of frequency in May-June and in summer to fall were observed in this area. The highest frequency of macro jellyfishes were in July and mostly in East coasts (2811 per km2). During February 2007 to February 2008 Catostylos tagi and Chrysoara hysocello were dominated. Monthly jellyfish abundance variation showed inverse relation between Eastern and Western coasts. The maximum diversity was in August in Eastern coast and July in Western coasts. The minimum values were calculated in winter months in two areas. Obviously, with increasing jellyfish abundance, in summer months, fish larvae population decreased. Jellyfish explosion can be caused by several factors, fishing pressure and removing top predators from food web, climate change, global warming and eutrophication phenomena are defined as the major factors in jellyfish bloom in worldwide tropical coastal waters. Therefore human activities enhance the occurrence of this phenomenon. Recent drought, decreasing freshwater input, increasing waste discharge and overfishing are probable causes for jelly blooms in Khuzestan coastal waters.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Jellyfish ; Eiren hexanemalis ; Catostylos tagi ; Density ; Zooplanktons ; Biomass ; Marine ; Species ; Hydromedusae ; Scyphomedusae ; Siphonophorae ; Population
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 60pp.
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  • 83
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    Survey of Growth fingerlings to marketing size in Aspius aspius with food manualy (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Growth ; Fingerlings ; Marketing size ; Aspius aspius ; Food manualy
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 67pp.
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  • 84
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    Evaluation of photosynthetic products (phytoplankton) in the major estuaries of the southern Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Due to various Physic and chemical factors of rivers leading to the sea, the situation seems different topography and throughput rate initial productions in the different seasons and due to various circumstances physical and chemical rivers leading to the sea, seabed topography in different situation appears to be of primary production in the eastern and western between the Caspian Sea in the season, may be altered.Identifying species and determining the distribution and biomass of the changes and how they are affected by environmental changes and we are environmentally conscious. We also compare the current situation with previous studies, we find that the number and types of plankton biomass have been what it is. During 1392 in spring, summer, autumn and winter, in a study of 8 transects of 40 stations. In each transect from Astara to the Turkmen. 5 stations at depths of 5. 10 and 20 m were selected for sampling. The total number of 182 species from seven branches Bacillariophyta, Pyrrophyta, Cyanophyta, Chlorophyta, Euglenophyta, Xantophyta and Chrysophyta phytoplankton were identified. Including 81 species of Bacillariophyta, 33 Cyanophyta, 25 Pyrrophyta, 31Chlorophyta , 9 Euglenophyta, 1 Xantophyta and Chrysophyta had 1 specie. Most of Bacillariophyta (61 species) was in Autumn and then in winter (48 species). Dominant species of Bacillariophyta were Pseudonitzschia seriata, Rhizosolenia fragilissima, Stephanodiscos sp. , Melosira varians, Nitzschia acicularis and Cyclotella menenghiniana Pyrrophyta was greatest diversity of branches in summer, autumn and winter (19 species), which includes Exuviaella cordata, Exuviaella marina, Prorocentrum praximum and Prorocentrum scutllum. In the autumn density of Cyanophyta was 285/7(± 137/1) cubic meters × 106 and biomass was 95( ± 54) mg per cubic meter) and 18 species were observed. The dominant species in this category were Oscillatoria sp., Nodularia spumigena and Oscillatoria agardhii. Most species of Chlorophyta branche in autumn and winter and summer median region with the highest density at the density of 26/2% and most of it is Binuclearia lauterbornii. Identified as the branches Euglenophyta were Trachelomonas, Euglena and Phacus that were observed in all seasons. In winter, the highest mean biomass was 9( ± 0/818) mg per cubic meter and the highest density of in summer was 0/5 ( ± 0/5) in cubic meters × 106. In winter the depth of 10 meters and surface of Babolsar, Amir Abad and Anzali, a kind of Chrysophyta and in surface of Tonekabon and Anzali a species of Xantophyta were observed that had negligible density and biomass. Studies have shown that density and biomass of Bacillariophyta were 228 (± 471) per cubic meter × 106) and 6157 ± ( 290) mg per cubic meter) respectivity and Pyrrophyta were 28/17( ± 27/14) cubic meter × 106in cubic meters) and 3349 ( ± 336) mg per cubic meter) and Cyanophyta 120/40 (± 123/87) per cubic meter × 106 per cubic meter), biomass (55 ± 57mg per cubic meter) were the branches of the dominant phytoplankton. Abundance and biomass in different seasons have been significant differences (p 〈0.05).
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Chemical ; Physical ; Environmental ; Photosynthetic product ; Phytoplankton ; Species ; Biomass ; Plankton ; Sampling ; Bacillariophyta ; Pyrrophyta ; Cyanophyta ; Chlorophyta ; Euglenophyta ; Xantophyta ; Abundance
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 87pp.
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  • 85
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    Using pellt in grass carp Ctenopharygodon idella (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: For hand feeding of Grass carp (Ctenopharyngodon idella), a kind of fish used in integrated carp culture, two kinds of pellets with Alfa alfa as current food were suggested as follows: 1. Pellet B with low fiber and high protein 2. Pellet C with high fiber and low protein The ingredient ratio was powdered and mixed, by adding water, fiber was made and minced the minced pellet was put on net tray and then in blotter to be dried and ready for use. In this experiment food quality analysis and also food water stability was measured. Regarding sampling, growth rate and weight increase of fish and FCR of each ratio was determined. Results indicates diet C is not able to compete with Alfa alfa from the stand point of weight increase, FCR and price. But diet B with low FCR and higher growth rate and higher price (not meaning ful P 5%) can compete with Alfa alfa.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Grass carp ; Feeding ; Pellet ; Ctenopharygodon idella ; Fish ; Culture ; Alfa alfa ; Fiber ; Protein ; Sampling ; Growth ; FCR
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 33pp.
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  • 86
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    Study on effects of red light intensities and periods on growth performance of Caspian trout (Salmo trutta caspius) larvae (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Survey is conducted to evaluate the effects of different intensities and durations of red light spectrums on growth performance and survival of Caspian trout (Salmo trutta caspius) in Coldwater Fishes Research Center (CFRC). According to the standard methods and manuals, selected 1.1±0.2 g (1755 individuals) larvae transferred from a registered and well-known hatchery and introduced to the fish tanks in CFRC after quarantine and adaptation procedures. The trial designed for 9 treatments with 3 repeats and fish tanks (California troughs) stocked by 65 larvae. All tanks were separated by dark plastic sheets individually to more controlling actions on special lighting regimes, except controls. Lighting actions were conducted as long as survey stage for 36 days by economic lamps (P: 40/50 W, =550/880 lum) on lighting durations of 12/12, 10/14, 14/10 h (on/off) and 24 (on) by 40/50 W lamps respectively for treatment 1 to 8. Controls are considered in treatment No. 9 by natural and environmental lighting regime. The biometry operations were carried out in a 6 days interval. Results were analyzed with SPSS (Version 12) software and by ANOVA one way analysis method and multiple levels of Duncan Test; graphs were illustrated by Excel software. According to the results, most of the measured factors as growth indicators (FW, WG, FCR and SGR) in treatments (1-8) had showed significant differences in compare of control. In this case, oily drips in retina layer of eye s larvae absorb the short light spectrums and let the long spectrums to be transferred. Thus because of more vision, feeding behavior could develop with lower stress condition. Moreover, some growth factor (SGR, WG and FCR) rates in larvae showed better values significantly in treatment (1) (12/12 h lighting with 550 lum) in compare of other treatments and controls (P≤ 0.05). In addition, there are not any harmonized and expected growth parameters with synchronized red lighting intensities and durations in the Caspian trout larvae. It seems that recent demonstrations were influenced by physiological effects of some endocrinal glands and brain neurotransmitters.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physiological ; Environmental ; Caspian trout ; Salmo trutta caspius ; Larvae ; Red light ; Light strengthen ; Light duration ; Growth ; Survey ; Survival ; Coldwater ; Feeding
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 54pp.
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  • 87
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    The assessment quality of effluent from shrimp aquaculture site in Gwater (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Present study was conducted in shrimp farm located in east of Chabahar in Sistan and Balouchestan province from August 2001 until May 2003. Fourteen stations at three locations (i.e. supply channel, drainage channel and Gwatr Gulf) were selected to determine physical and chemical factors such as; temperature, salinity, dissolved oxygen, pH, nitrate, nitrite, ammonia, phosphate, silicate, total suspended solid and turbidity. Sampling was conducted twice a month during the shrimp culturing period and monthly at other times. Water samples were collected every two weeks to determine Chemical and Physical factors, Chlorophyll a, Phytoplankton and Zooplankton. Sediment samples were collected seasonally to examine Macrobenthos, Grain size and Total Organic Matter. The results revealed different bioenvironmental area in the three locations (i.e. supply channel, drainage channel and Gwatr gulf) over the study period. One-way analyze of variance of chemical and physical factors indicated significant difference between different times as well as different stations (p〈0.05). The negative relationship was observed between the culturing production area and the amount of average dissolved oxygen, pH and total suspend solid. An increase in the culturing production area in 2002 as compared to that of 2001 causes a decrease in the amount of these factors. However, it dose indicates positive relationship with nitrate, nitrite, ammonia, transparency and chlorophyll. Forty nine phytoplankton genus were identified, which mainly belong to diatoma, dinoflagellate and green blue algae. Diatom was dominated among these groups. Diatom and green-blue algae and diatom comprised %79, %69 and %64 of phytoplankton flora respectively in supply channel, Gwater Gulf and drainage channel. Copepod and thintinnida were the major groups of zooplankton. High abundance of bivalve, Polychaetes and amphipoda were found in supply channel, Gwatr Gulf and drainage channel respectively. Analysis of grain size showed the existence of sandy sediment in Gulf of Gwatr and sandy-loom in supply channel. Drainage channel sediment found to be sandy-loom, sandy-silty-loom and sand loom. Among three locations, the highest TOM was found in drainage channel. In last location, production area in 2002 increased as compared to that of 2001, which showed negative relationship with salinity, nitrate, nitrit, ammonia and chlorophyll a. Drainage of the Gwatr s shrimp farm did not cause any thermal contamination in the location. Shrimp aquaculture activities caused an increase in the average of salinity, range of pH in the Gwatr Gulf.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physical ; Chemical ; Shrimp ; Aquaculture ; Temperature ; Salinity ; Dissolved oxygen ; pH ; Nitrate ; Ammonia ; Sampling ; Phytoplankton ; Zooplankton ; Sediment
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 153pp.
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  • 88
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    Study on Economic Aspects of Tilapia Culture in Iran (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The study on economic aspects of tilapia culture in Iran is a subproject of a comprehensive project on introduction of tilapia to central regions of the country. Two types of red and black of the exotic tilapia were imported from Indonesia in 2009 for research and were transferred to the research center of Bafgh. Since tilapia has capabilities in aquaculture such as resistance to diseases, fast growth, tolerance to high intensity, growth in freshwater, brackish water and in saline water, also ability to grow in pond, cage and aquaculture tanks, so it is likely that it’s production be of economic advantages. Therefore the present study looked at economic aspects of raising tilapia. The factors examined were feed expenditures, wages, fertilizer spending, costs of fish fingerlings, and pond preparation in two treatments of black and red tilapia in 0.45 hectare earth ponds, 3m2 aquaculture tanks with two replicates. Results of data analyses showed that benefit of each pond for black tilapia would be about 5968763 Rials. For red tilapia this amounted to 5939696 Rials. On total the benefit for black tilapia pond culture was 11940444 Rials while this for red tilapia was 11879392 Rials, so we can conclude that pond culture of tilapia is beneficial. Culture cost of black tilapia in tanks with 57 Kg outcome, was 2540600 Rials. Accordingly the cost of each kilogram of fish is 44572 Rials, so with 20 percent benefit, the price for each kilogram is 53485 Rials. Also for producing 37 kilograms red tilapia in tank some 2531500 Rials was expended. Each kilogram red tilapia cost 68419 Rls to produce which is much more than other cultured fish and if we expect 20 percent benefit the price of each kilogram of red tilapia would be 82103 Rls. So it is concluded that tank fish culture of tilapia would not be beneficial and economically speaking there would be no point to raise tilapia this way.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Red and Black Tilapia ; Economy ; Pond culture ; Tank culture ; Feeding ; Freshwater ; Brackishwater ; Saline water ; Tilapia ; Aquaculture ; Fertilizer ; Fingerlings
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 59pp.
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  • 89
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    Survey on environmental pollutants (Heavy metals, Hydrocarbons, Surfactant and Chlorinated pesticides) in southern part of the Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Recently, the ecology of the Caspian Sea coastal has undergone with increasing development of human activities and industrial wastewater discharge. Therefore, considering the current situation, evaluate of pollutants issue in the Caspian Sea is very important. Results of this study showed that levels of heavy metals (Cd, Cr, Cu, Fe, Pb, and Zn) of water had lower than standard and also acceptable for aquatic life. Significant accumulation of metals such as Co, Cu and Cr in the sediment was observed at transect Sefidrood and Anzali in comparison with six other transects (Turkmen, Amirabad, Babolsar, Noshar, Tonekabon and Astara) and for Ni at transects Sefidrood and Astara compared with six other transects (Turkmen, Amirabad, Babolsar, Noshahr, Tonekabon and Anzali) (P〈0.05). The amount of Zn in fish muscle Liza saliens was maximum and then metals such as Fe, Cu, Pb, Cd, Ni, Hg and Co were recorded (P〈0.05). In the north of Iran, two kind of bony fish, such as R..frisii kutum and Liza.s have maximum catchments as compared with other bony fish in the Caspian Sea. Based on calculation of risk of Target Hazard Quotient (THQ), we obtained THQ was less than one for all metals in young and adults human. Thus, consumption of R..frisii kutum and Liza.s per capita with 6 kg will not be at the risk for young and adults. Among of oil derivatives, polyaromatic hydrocarbon (PAHs) is hazardous compounds in the environment. Environmental Protection Agency (EPA) was announced 16 compositions of PAHs as an index. The results of this project showed that concentration of two and three rings of PAHs was lower than 4, 5 and 6 rings of water, sediment and fish at most stations and seasons. Among of 16 PAHs, only Benz(α)anthracene, chrysene, Benzo(α)pyrene and Dibenz (α, h)anthracene compounds were contained with ecological risks (HQ) more than one in the water and sediment. In addition, three compounds such as Chrysene, Benz(α)anthracene and Benzo(α)pyrene were observed in the edible fish tissues (Liza.s and R..frisii kutum) which have high ecological risks in the water and sediment. During four seasons (spring, summer, fall and winter), maximum concentration of organochlorine residue in the surface water (5m depth) were belong to β-Endosulfan (Turkmen), Dieldrin (Babolsar, Tonekabon) and endosulfan sulfate (Astara) and at 10m depth were γ-BHC, Dieldrin compounds (Tonekabon), DDT (Turkmen) and Aldrin (Babolsar). This values at 50m depth were belong to γ-BHC (Anzali), δ-BHC (Tonekabon), Dieldrin (Amirabad), and heptachlor (Amirabad). Maximum percentage of organochlorine pesticides residue in the sediments was belonging to only Aldrin compound at stations Turkmen, Babolsar and Tonekabon. In addition, maximum concentration organochlorine pesticides residue in fish tissue (Liza.s and R..frisii kutum) was DDT and Endrin aldehyde compounds. Mean surfactant concentration (LAS) of surface water (5, 10 and 50 m depths) at eight transects was 0.017±0.049 mg/l. The maximum concentration of LAS were 0.084 mg/l and 0.082 mg/l in spring and summer (Anzali transect), respectively. This value was 0.035 mg/l and 0.060 mg/l in autumn and winter (Sefidrood transect), respectively. As a conclusion, the concentration of surfactant in the Caspian Sea basin is not critical as compared with standard level.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: environmental ; Ecology ; Industrial ; Survey ; Pollutants ; Heavy metals ; Hydrocarbons ; Aquatic ; Bony fish ; R.frisii kutum ; Liza ; PAHs
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 207pp.
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  • 90
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    Survey of Handling and freezing storage effects on quality of Aras dam's fresh water crayfish meat (Astacus leptodactylus) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Sampling for this study was carried out at the freshwater crayfish fishing season (May to December ) from the selected packs made from one of the harvesting centers at the first day ( harvesting and packing ) until the seventh day ( the export time ) using registered number to determine the handling effect ( live ) and changes in chemical and microbial indices in tail fillet stored at -18 ° C at days 1 and every 15 days considering 1 treatment and 3 replicates. The comparison of results mean (±SE) of the effects of handling on tested indices showed a significant reduction of protein percentage (dry weight) of tail filet at day 7 (13/85 ± 0/07) comparing with fishing day (16/1 ± 0/05) ( (p 〈 0.05). So that by increasing the handling and storage period, the amount of protein (dry weight) was reduced. Comparison of carbohydrate percent (dry weight) during handling showed a significant difference between the first day (2/8 ± 0/009) with the seventh day (0/9 ± 0/005 (p 〈0.05). Percent of moisture showed a significant increase during handling between day 1 (79/2 ± 0/24) and 7 (84 ± 0.41) (p 〈 0.05). Mean chemical composition of haemolymph showed a significant reduction in triglycerides (milligrams per deciliter) at fishing day (14/3 ± 0/16) and day 7 (11/7 ± 0/13) (p 〈 0.05). Comparison the means of saturated and unsaturated fatty acid profiles and the ratio of DHA / EPA did not show significant differences (p〉0.05). Comparison of the mean (±SE) of total bacterial count (log CFU / g) and psychrophilic bacteria at different periods of tail fillet storage at - 18 °C showed significant differences at day1 ( 3.48 ± 0.00 and 1.0± 0.00) compared to day 180 ( 6.86± 0.85 and 6.75± 0.25) , respectively(p〉0.05) .Comparison of Mean (±SE) of chemical indices for first day with day 180 were thiobarbituric acid ( mg malondialdehyde /kg ) (0.19/0 ± 0/07) and (1/45 ± 0/25), peroxide ( meq oxygen/ kg fat ) (0/81 ± 0/21) and (2/2 ± 0/3), total volatile basic nitrogen ( mg per 100 g fillet ) (13/21 ± 1/01) and (26/6 ± 1 / 40) and acidity (6/26 ± 0/08) and (6/55 ± 0/05), respectively which showed significant differences with each other (p 〈 0.05). Therefore, cited to the results of microbiological and chemical parameters, maximum shelf life longetivity of freshwater crayfish tail fillets packaged in the air is recommended as 5 months after freezing at – 18 °C.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Chemical ; Microbial ; Microbiological ; Handling ; A.leptodactylus ; Quality ; Freezing ; Fillet ; Spoilage ; Survey ; Fresh water ; Crayfish ; Astacus leptodactylus ; Protein
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 46pp.
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  • 91
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    A survey of some biological aspects of Cobia (Rachycentron canadum) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Biology aspects of cobia (Rachycentron canadum) were investigated from October 2005 to December 2006 in Northern waters of Persian Gulf (Hormozgan province).The reproduction cycle, sexual maturity, sex ratio, Fecundity, Lm50, feeding, length frequency, growth parameters and mortality of cobia were studied from total of 509 specimens ranged from 19 to 159 fork length. Gonadosomatic index peaked during spring and summer with main peak in June. Spontaneous spawning occurs around the year with peak in June. The overall female to male ratio was significantly 1 : 1.49 (P〈0.05). Batch fecundity were estimated 1684954±118990 in 15 females. Relationship between total length and fecundity were calculated F=1.3717TL 2.9567 (r2= 0.82). Feeding studies indicated that the bony fishes were main food of cobia (76%) and followed by crustaceans (25%) and mollusks (11%). Rays were least food items (22%). Maximum and Minimum GaSI were observed in March (33%) and August (0.07%) respectively. Females reached 50% sexual maturity at 81.25 cm TL. The total length -weight relationship was W=0.0042L3.1162 ( r2=0.9852). Thetotal length-fork length relationship was TL= 1.1561FL-2.533 (r2= 0.9933). Growth parameters K, L ,and t0 were calculated by von bertalanfy growth equation : 0.11 (year1), 168.65 cm, 3.49 and -0.97 respectively. The instaneous rate of total mortality (z), natural mortality (M) and fishing mortality estimated by catch curve analysis were 0.30, 0.25, 0.14 (year1). Exploitation rate and Tmax were 0.36 and 28 yearrespectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Rachycentron canadum ; Cobia ; Sex ratio ; Fecundity ; Lm50 ; Feeding ; Mortality ; Growth ; Parameters ; Biology ; Maturity ; Spawning ; Fecundity
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 85pp.
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  • 92
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    Survey of Barbus grypus and Barbus sharpeyi (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Barbus sharpeyi ; Barbus grypus ; Survey ; Fish
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 140pp.
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  • 93
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    Survey on status of tunas in the Oman Sea (Sistan and Baluchestan Province) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This project was conducted in order to survey on status of stocks of tuna and determine some biometric parameters from industrial and artisanal fisheries in Oman Sea (Sistan and Baluchestan province) during April 1997 to March 2000. It was determined the spawning peaks of yellowfin and skipjack tuna on May- June and on May-June, Jan-Feb respectively, using the data collected from artisanal fisheries during these years. The first length at sexual maturity of females (Lm50%) come for yellowfin, skipjack and longtail tuna when they are 76cm,61cm and 72cm long respectively. Analysis of stomach contents showed that squid was the major components of diet for yellowfin and fish for skipjack, longtail tuna. A comparison of mean length from the same fisheries by two- way analysis of variance based on year and landing showed significant differences by year for yellowfin and skipjack tuna during April 1996 to March 2000. There are available the information on length-weight relationships of three species mentioned the above, as well as growth and mortality parameters of yellowfin and skipjack tuna. It was also determined the distribution of these species by spring, autumn and winter, using the data collected from artisanal fisheries during April. 1999 to March 2000. A comparison of the current distribution was very different with the previous studies in the year 1994-1995. In refer to an increased trend of CPUE of the sampled artisanal vessels (high capacity) in 1999 in comparison with the year 1997, it predicts greater use of the high capacity vessels to harvest more quantities of the resources, especially skipjack tuna. Based on a decreased trend of CPUE of purse seiners in local waters during the years 1996 to 2000, it recommends less activities of the vessels.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Tuna ; Biometric parameters ; Maturity ; Longtail tuna ; Skipjack tuna ; CPUE
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 103pp.
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  • 94
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    Investigation on production frozen minced fish meat and frozen fish ball from Abramis brama (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: To study the preparation of frozen minced meat from abramis brama orientalis commonly known as sim from Arras lake and from silver carp cultured in the Azerbaijan province, and later this minced meat converted to fish ball and fish burger, in this process microbial, chemical and organoleptic tests was done on samples for frozen minced meat on Sims fish the TVN was 10.1 in zero phase and 14.1 after three month and peroxide value from 0.9 t0 3.1 at the same duration. But he value was higher when converted to fish ball, TVN ranged from 14 to17.6 and per oxide from 1.1 to 4.7 after three month, the unit for TVN was mg/100gram and peroxide unit meq/1000 gram, the microbial tests was also resulted in an acceptable range, the meat of Sims fish had no significant difference with the silver carp comparatively only the color and the smell of the fish was little different, so we could conclude that we can use Sim fish meat for frozen minced meat product and this can increase the consumption of fish in the region in the future.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Microbial ; Chemical ; Minced fish meat ; Frozen fish ball ; Abramis brama ; Silver Carp ; Culture ; Oreganoleptic test ; Samples
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 39pp.
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  • 95
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    Survey of genetic improvement and breeding of Common Carp by genome manipulation from 1999-2001 (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The management of fish breeding and improvement is a key in fish culture because, the condition and genetic of broodstocks provide the quality of offspring. One of the most important tools in fish breeding and improvement is the genome manipulation techniques and specially gynogenesis. In a research study in 1989 and 1990, first the transferrin genotype of some different water basin and fish farms were studied. Statics analysis showed the significant different between the genotype of two species of Caspian sea carp and breeding carp of Rajaii fish farm. Caspian sea carp showed pure race of carp with BB dominant genetype, whereas sampling from Shahid Rajaii fish farm showed variety genotypes including AA, AB, AC, BC, CC After then the production of gynogenesis common carp have been investigated in Fishery Research Center of Mazandaran. The eggs of scaly common carp were inseminated with 90, 100, and 110 krad gamma- irradiated sperm of selected common carp and the most suitable dosage found to be 100 krad. Treatment of eggs in OC cold shock at a duration of 50 minutes and 40C heat shock for two minutes, applied 5 minutes after fertilization gave the sufficient response to induce diploid gynogenesis. The pick output of wnogenetic diploid viable larvae was obtained 2.5% by heat shock and 7% by cold shock the production of meiotic gynogenesis was conformed by isozym marker. The progeny were all-maternal inheritance common carp.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Genetic ; Breeding ; Common carp
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 63pp.
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  • 96
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    A survey on some risk factors and evaluation of their impacts on streptococcosis in rainbow trout farms in east of Mazandaran province (Haraz River) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: One of the most important bacterial fish diseases which has caused some outbreaks in rainbow trout farms in Iran is streptococcusis .The farmers were suffering from huge economic losses due to the disease outbreaks in different rainbow trout farms in Iran. The aim of our study was to determine rate of streptococcusis incidence in different stage of growth in farmed rainbow trout in Haraze River, Mazandaran province. Fish and water samples were randomly collected and measured of randomly in10 selected farms, monthly throughout a year. After clinical observations, Isolation and recognition of strep strains were made using biochemical tests. Some Environmental factors include Nitrate, Nitrite, Temperature, pH, Ammonia and DO measured during sampling periods. According to our results 4.6% of juvenile samples showed clinical singe of streptococcusis while only0.7% of them had strep. Contamination .These rates in adult samples were 8.9 and 1 percent respectively. Major isolated bacterial strain was Streptococcus uberis . Incidence of streptococcusis in rainbow trout 20% affected by fluctuation of Nitrite, temperature and DO. Management of these factors can decrease rate of disease outbreaks.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Clinical ; Environmental ; Streptococcusis ; Incidence ; Rainbow trout ; Environmental factors ; Survey ; Bacterial ; Diseases ; Samples ; Temperature ; pH ; Ammonia ; Juvenile
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 64pp.
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  • 97
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    Comprehensive study on probability of controlling Caspian Sea invasive Ctenophora (Mnemiopsis leidyi) (Activity 2: Investigation on Mnemiopsis leidyi diet in the Caspian Sea) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Mnemiopsis leidyi is one the species of comb-jelly. It belongs to the Ctenophore phylum and Lobate order. It is a purely marine, free-swimming animal with a transparent jelly-like walnut-shaped body, which was transported from the Black Sea into Caspian possibly at the end of 1990s. This species is food rival of pelagic fish. It has been reported that the ctenophore caused the dramatic decrease of zooplankton and pelagic fish stock in the Black Sea. In this study, sampling on Mnemiopsis leidyi, zooplankton, phytoplankton was conducted from December 2003 to March 2005, from a total of 11 stations located along four transects (Anzali , Khazarabad, Tourkman and Gorgan Bay) by METU net in the Iranian coasts of the Caspian Sea. Clupeonella catch was done by light fishing with fishing vessel in Anzali region. The results showed that the biomass of M.leidyi had some fluctuation in different seasons and its maximum biomass was recorded in summer with a figure of 524.4±156.2 g.m2 Tourkman region and the minimum biomass was observed in winter with a figure of 5.15±1.81 g.m2 in Anzali region. Study of stomach of Mnemiopsis showed, that Acartia (belonged of Copepoda with 66 %), lamlibranchia (13 %) has the highest frequency and the lowest were Balanus nauplii, Rotatoria, Tintinnopsis and Podon polyphemoides. The maximum mean abundance of zooplankton was 29368±24318 n.m3 in winter (Anzali region) and the minimum was recorded 4170±5014 n.m3 in summer (Tourkman region). Copepoda was dominant zooplankton in the Iranian coasts of the Caspian Sea. Chrysophyta with 150000000±440000000 n.m3 and Euglenophyta with 260000±521000 n.m3 had the highest and the lowest frequency respectively in the Caspian Sea. The main foods of Clupeonella were Acartia with 80 %. The survey of stomach of Clupeonella showed that the feeding of these species was not good and the highest fullness index was recorded 220.95±314.67. These results showed, the main food item of Ctenophora and Clupeonella were Copepoda (Acartia). It seems, the impact of Mnemiopsis leidyi feeding has been the important factor in declining zooplankton populations, Clupeonella stocks, and also increasing of phytoplankton abundance.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ctenophora ; Mnemiopsis leidyi ; Diet ; Species ; Phylum ; Pelagic fishes ; Sampling ; Zooplankton ; Phytoplankton ; Acartia ; Ctenophora ; Population ; Abundance
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 53pp.
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  • 98
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    The study of diversity, distribution and abundance of Zooplankton in the southern of Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This survey was carried out by R/V Gilan with a conical plankton net of 100 micron mesh by vertical hauls at 8 transect in the southern Caspian sea. Transects were located at Astara, Anzali, Sefid roud, Tonekabon, Noshahr, Babolsar, Amirabad and Torkman in depths of 5, 10,20,50and 100m. Samples were taken in 4 seasons ( in each season 64 samples) in 2009. In this study 23 species formed the zooplankton community including 4 species of Copepoda, 8 species of Rotatoria, 2 species of Protozoa and 8 species of Cladocera. The meroplankton blonged to 2 species of Balanus sp and Lamellibranchiata larvae. The annual results revealed that the maximum abundance of Copepoda were 3612±4839 ind/m3 and 35/75 ±42/81 mg/ m3 in summer and decreased gradually since autumn and reached to minimum value in winter. The maximum abundance of Cladocera was 300± 383 ind/m3 in spring and reached to less than 4 ind/m3 in summer and autumn. The Rotatoria had high population (3775± 8632 ind/m3) in winter which consisted the zooplankton population with Copepoda. The Protozoa had no efficient role in zooplankton population of Caspian sea during the year. The zooplankton population was affected by Meroplankton and Lamellibranchiata larvae in spring and winter. The Copepoda contributed in zooplankton population only in summer and autumn. The maximum zooplankton abundance and biomass were in 5m depth which included 10209±8352 ind/m3 and 43/56±26/08mg/ m3 in spring, 8545±7127 ind/m3 and 73/59±56/65mg/ m3 in summer(10 m depth), 8427±6711 ind/m3 and 43/15± 29/59 mg/ m3 in autumn and 24426 ±26975 ind/m3 and 334/25±392/21 mg/ m3 in winter which decresed from surface to depth. The maximum abundance and biomass of zooplankton were 5119±6018 ind/m3 in east and 28/59±24/79 mg/ m3 in central area in spring, 6628±7117 ind/m3 in west area and 50/73±59/52 mg/ m3 in central area in summer, 5248 ±5489 ind/m3 and 31/16 ±31/22 mg/ m3 in west area in autumn and 11588±16191 ind/m3 and 131/02±193/61 mg/ m3 in west area in winter. The annual statistical analysis reveals that there is significant difference between Copepoda and Cirripedia population among seasons, sampling stations, depth and sampling layer (Kruskalwallis test, p〈0.05) and the total zooplankton populatin had no significant difference only between seasons (Kruskal-wallis test, p〉0.05). The Cladocera, Lamellibranchiata larvae and the Rotatoria had significant difference between seasons only (Kruskal-wallis test, p〈0.01).
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Zooplankton ; Copepoda ; Meroplankton ; Survey ; Plankton ; Samples ; Species ; Cladocera ; Meroplankton ; Balanus sp. ; Lamellibranchiata ; Larvae
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 123pp.
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  • 99
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    A survey on some risk factors and evaluation of their impacts on streptococcosis incidence in rainbow trout farms in west of Mazandaran province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study aimed to investigate the effects of 5- parameter dissolved oxygen, PH, nitrite, nitrate and temperature of the water on Streptococcosis incidence in two groups of fry and grower fish. Research was performed at west Mazandaran province -Tonkabon region in 12 rainbow trout selected farms. Research conducted in 3 farms with well source water , 8 farms with water source of the river of Dohezar and one farm with water source of the river of Azarood, during 12 consecutive months.From 1390/04/01 to 1391/04/01, once time each month , and in each time 10 fish randomly sampled, inlet water were sampled simultaneously. Of 1350 sampled fish 607 fish with an average weight 22.04 gr , average length 12.59 cm were in fry category and 743 fish with an average weight 156.25 gr, average length 23.32 cm in were grower category. Streptococcosis observed only in grower category. Of 72 fish with clinical signs of the disease, 14 numbers were positive Streptococcosis (19.44%) and 58 numbers were negative Streptococcosis(80.55%). Three fish from grower category has not any clinical signs of disease and seemed to be healthy but were positive Streptococcosis in examinations (0.22% of total fish sampled. Fish with clinical signs of the disease but negative Streptococcosis were of at least 55.1 gr and at most weight 417 gr respectively. The results showed that 47.07% cases of Streptococcosis happened at 15.6 °C water temperature, 35.29% at 16.98 °C and 17.64% cases happened at 18.04 °C so that 100% of Streptococcosis cases was observed at the average temperature of 16.99 °C. In addition, the survey results show that despite relatively high levels of nitrite in source water of farms from wells, nitrite does not effect on the disease incidence. It seems that an optimal level of dissolved oxygen in water is effective in reducing the effectiveness of nitrite in this disease. According to equation coefficients logit model is as follows: According to Logit model, it seems that for every degree change in temperature and pH of water, morbidity change will diminish 0.37 % and 1.74 % respectively. 80.56% of fish sampled that had the clinical symptoms, was ranging from an average weight of 5.1 gr (fry) and 417 gr (grower fish), that despite having clinical signs of the disease were negative Streptococcosis. Isolation of Staphylococcus bacteria as well as Gram-negative bacilli from fish with clinical symptoms similar to the symptoms of Streptococcosis, may indicate the involvement of other pathogens in fish clinical signs.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Streptococcusis ; Risk factors ; Cold water fish ; Survey ; Rainbow trout ; Dissolved oxygen ; pH ; Nitrite ; Clinical signs ; Temperature ; Pathogen
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 60pp.
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  • 100
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    Feeding investigations of silver carp (Hypophthalmichthys molitrix) fingerlings with emphasis on dominant phytoplanktons (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In order to study phytopague fingerlings feeding in fish ponds, simultaneously to the beginning of warm season and cultivation, fingerlings of 3-5 gr from 4 ponds in Mazandaran province were captured, fixed with formalin, then transferred to the plankton determination laboratory of Caspian sea ecologic institute. Based on carried out studies on the first and the end party of their intestine and the pond water, phytophague fingerlings feeds on phytoplankton, zooplankton and detritus. But the essential nutrition was on phytoplankton and detritus. Planktonic groups were formed of Cyanophyta, Chlorophyta, Chrysophyta and Euglenophyta. But in addition to these four groups Pyrophyta was present in fish pond water. Relative abundance of these nutrient organisms in water and intestine was different. Also in most cases a direct relation was observed between the intensity of water organisms and intestine ingredients. Based on this study, essential differences of digestion were observed following to the source of nutrition and the most difference were considered in digestion of Chrysophytes, Cyanophyta and Chlorophyta. Base on the results of this study we propose to make more studies on fertilization and the proportion of different fertilizers in fish ponds in order to obtain easily digestible phytoplankton thus increase in fish exploitation.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Silver carp fry ; Nutrition ; Phytoplanktons ; Zooplanktons ; Chrysophyta ; Cyanophyta ; Clorophyta ; Pyrophyta ; Euglenophyta ; Feeding ; Hypophthalmichthys molitrix ; Fingerlings ; Fertilization
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 83pp.
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