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  • 1
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    Providing brood stocks of Caspian trout (Salmo trutta caspius) from Mazandaran Rivers and production of one hundred thousand fries (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Caspian trout (Salmo trutta caspius) is one of valuable fishes of the Caspian sea for people living in the Northern coastal area of Iran. Since fish stock and natural resources protection is one the Iranian fisheries research objectives, the most activity on Caspian trout rehabilitation was focused on releasing thousands of smolts in the rivers discharge to Caspian Sea. Catch statistics of this species has declined over last decades thus this study on quality of provided brood stocks and producing fries with suitable quality can help rehabilitation and rearing of this valuable species. Several rivers were considered for providing brooders to keep genetic resources variety of sea stocks. In spawning season 25 (9 male, 16 female) and 30 (5 male, 25 female) brooders were collected from fishermen in Mazandaran rivers and Gyilan coasts provinces respectively. After propagation and larvae rearing, 11500 (10-15 g.) and 50000 (less than 10 g.) juveniles were released in Gyilan and Mazandaran rivers respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Caspian trout ; Salmo trutta caspius ; Brood stocks ; Rehabilitation ; Fisheries ; Species ; Rearing ; Genetic ; Propagation ; Juvenile
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 32pp.
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  • 2
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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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  • 3
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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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  • 4
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    Study on brood stock management of Litopenaeus vannamei using imported post larvae (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In order to domesticate Litopenaeus vannamei as a solution to single species shrimp aquaculture of Penaeus indicus and to reduce risk of shrimp culture in emergency cases, this study was carried out. Initially the postlarvae reared from imported L. vannamei were cultured. After culture season the adult shrimps were transported to greenhouse ponds for wintering. It is then relocated to hatchery saloon. After eye stalk ablation and maturation the female brood stocks were introduced to matured male for copulation at ponds. During the study period, male and female shrimps attained full maturation at end – April by temperature over 25ºC, the copulation process was started significantly. Finally of the 12 instances of copulation, one instance resulted nauplii production. The best maturation was observed at 28 ֯C ±1 and salinity30 to 33PPT and pH of 8 to 8.3 Fresh sea worms and squid showed the highest effect on fecundity in brood stocks. Besides, the spring season was obtained to be the best period for brood stock production in Bushehr province.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Litopenaeus vannamei ; Brood stocks ; Larvae ; Species ; Shrimp ; Aquaculture ; Postlarvae ; L.vannamei ; Hatchery ; Maturation ; Nauplii ; pH ; Sea worm ; Squid
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 25pp.
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  • 5
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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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  • 6
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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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  • 7
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    Study on Viral Nervouse necrosis (isolation, characterisation and pathogenesis) in Golden grey mullet in the Caspian Sea and study of pathogenecity and possibility of transmission to the other fish species (Sturgeon fishes, Rutilus frisii kutum and reared Rainbow trout and Carp) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Study on Viral Nervouse necrosis (isolation, characterisation and pathogenesis) in Golden grey mullet in the Caspian Sea and study of pathogenecity and possibility of transmission to the other fish species (Sturgeon fishes, Rutilus frisii kutum and reared Rainbow trout and Carp) Viral Nervous Necrosis (VNN) is a worldwide disease affecting several species of cultured marine fish. For the past two decades, betanodavirus infections that cause Viral Nervous Necrosis (VNN) have emerged as major constraints on the culture and sea ranching of marine fish in almost all parts of the world. More than forty species mainly of marine origin have been so far affected and this number is likely to rise in future following the introduction of new species and the increase of aquaculture trade. Unknown acute mortality occurred in wild golden grey mullet Lisa auratus and Liza saliens in Iranian waters of Caspian Sea in recent years. In order to isolation and confirmation of causative agents of golden grey mullet mortality in the Caspian Sea, a complementary research investigation project was designed in 2005 and approved immediately in Iranian Fisheries Research Organization (IFRO). Many diagnostic aspects such as Virology (Cell culture and Elctereone Microscopy), Hemathology, Bacteriology, Histopathology, Molecular biology (NestedRT-PCR), Heavy metals measuerment and Serology (IFAT and IHC) were employed in mentioned multidiciplinary project. About 322 moribund fish samples which revealed skin darkening, erratic swimming behavior such as spiral and belly-up at rest and high distention of swimming bladder. Suspected samples were collected from coastal capture sites in iranian north proviences in 2006 till 2009. Targets tissue such as brain and eye were removed in strile condition and then kept in -80oC frezzer for cell culture and Nested-RT-PCR. Other tissue samples from liver, kidney, intestine, stomach, gill, skin and muscle, gall bladder and gonads were taken and fixed in 10% buffer formalin and same parts fixed in glutaraldehyde 3% for histopathology, IHC and EM respectively. Cytopathic effect (CPE) was observed in those cell cultures just six days after inoculation with the dilutions of the tested 312 homogenate supernatants. CPE in monolayers of cells cultured (SSN-1 cell line) was characterised by thin or rounded, refractile, granular cells with vacuoles. Nine samples were positive in virology assay. Nested- RT-PCR was done on suspected tissue samples and supernatant of CPE positive samples and 21 tissue samples and all CPE positive samples were positive. IFAT was selected as a confirmatory method for identifying viral strains replicating on cell cultures and carried out with rabbit anti-betanodavirus serum on suspected tissue samples and some smears of CPE positive samples. Some bright points approved betanodavirus antigen and confirmed cell culture and Nested-RT-PCR findings. In fixed tissue samples widespread and massive vacuolation were observed in brain, spinal cord, retina and optical nerve. In order to confirmation of diagnostic findings , IHC was done with monoclonal antibody antibetanodavirus and some red-brown points were observed. Theses findings revealed expected viral antigens and confirmed previous results. Moreover, virus particles with 25-30 nm in diameter were visualized in infected brain and retina using positive staining in TEM. Also pathogenicity test was employed to confirm the obtained results. So Guppy fish Poecilia reticulata and sturgeon fry were used instead of the experimental host due to ease of handling and susceptibility. After 15 days post infection, guppy bathed in VNN-infected tissue culture with 104 TCID50 showed clinical signs similar to naturally infected Golden grey mullet, and the mortality rate reached up to 100% in 75 dpi. When target organs were examined by cell culture isolation, serology, and histopathology, all revealed the presence of virus in the Guppy. Suspected supernatant injected to sturgeon fry through intravitreous injection and widespread vacuolation were observed in brain and spinal cord buy IHC and Real time PCR were negative. In conclusion, with attntion to obtained results in this investigation such as ecological factors, clinical signs, histopathological, virological and bacteriological results, molecular analysis, (IHC, IFAT, PCR), TEM demonstration, serological and hematological findings, it could be confirmed that VNNV was the main causative agent for disease outbreak in Golden grey mullet in Southern coastline of Caspian Sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Viral nervous necrosis ; Golden grey mullet ; Liza aurata ; Liza saliens ; Histopathology ; Virology ; Bacteriology ; IHC ; IFAT ; PCR ; TEM ; Species ; Sturgeon ; Rutilus frisii kutum ; Rainbow trout ; Carp
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 184pp.
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  • 8
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    Economical study of the grey mullet (Mugil cephalus) culture in the Golestan province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Striped grey mullet (Mugil cephalus) is a marine fish with high commercial value and widespread distribution. The grey mullet and some other mullets can be found in saltwater, brackish and fershwater habitats at tropical, subtropical and also temporal climates.This species is suitable for aquaculture worldwide due to living in wide ranges of water temperatures and salinities, acceptable growth rate, suitable food conversion ratio, marketability, suitable species for polyculture with shrimps, marine fish and even with freshwater carps. The grey mullet is farming in different countries such as Italy, Northern Africa countries ( Egypt), occupied Palestine, India, Pakistan, Japan, Hong Kong, Taiwan, Vietnam, Indonesia, coastal countries of southern pacific ocean and Hawaii. Ten thousands of fries of this species (average weight and length of 280 mg and 28.3 mm respectively) imported in March 2008 from Egypt. The wild fries colleted from surrounding natural waters of Alexandria. After finishing the quarantine steps, they stocked in four earthern ponds (each with 2500 m2) located at the Gomishan shrimp educational centre at late march in 2008. At the first year of culture the densities were 5000 and 10000 individuals per hectar and each treatment with two replicates. At second years densities changed with 2000 and 2500 ind./hec. and each of traetments divided fishes with average primary weights of 80 and 115 grames. The fries and fish feeding begins in April when the water temperature rise above 18 °C and it cut in fall when the temperature goes under 20°C. They fed twice a day at 8 AM and 2 PM and the amount was 5-7 percents of the fish existent biomass in each ponds. They fed with dry formulated feed made of Mahdaneh Karadj Company (Danso dry feed) both the first and second years of farming. The feed prepared for carps feeding and containded 23±2 % crude protein, 10 ±2 % crude lipid, about 7 % crude fiber, 15 % ash, 40 ±2% carbohydrates and with energy content of 4000±200 kcal/kg. After seven months culture period the average weight and length of fish in treatment 5000 ind./hec. were 113.7 gr and 21.1 cm respectively and in treatment 10000 ind./hec. the average weight and length were 86.6 gr and 19.6 cm respectively. At first year the average survival rate in different treatments was 77 percent. The average FCR in treatments 5000 and 10000 ind./hec. were 3.4 and 3.9 respectively. At second years after six months culture the average weights in pond no. 9 (with primary weight 115 gr and density 2000 ind./hec) , pond no. 10 (with primary weight 80 gr and density 2000 ind./hec) , pond no. 11 (with primary weight 115 gr and density 2500 ind./hec) and pond no. 12 (with primary weight 80 gr and density 2500 ind./hec) calculated as 476.6 ,338.1, 366.5 and 440 gr respectively. The average survival rate and FCR were 93 % and 3.1 respectively. Ponds no. 9 and 11 (fish stocked with primary weight 115 gr in densities both 2000 and 2500 ind./hec) selected as the best economic efficient treatments.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial ; Grey mullet ; Cultivation ; Economic efficiency ; Mugil cephalus ; Culture ; Marine ; Saltwater ; Brackishwater ; Fershwater ; Species ; Aquaculture ; Salinity ; Survival rate
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 81pp.
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  • 9
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    Investigation on feeding of Sardines and major Tuna fishes in west of Oman Sea (Jask area) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Feeding habits of three dominant species of tuna fishes (Thunnus tonggol, Thunnus albacares, Euthynnus affinis) and dominant species of sardine (Sardinella sindensis) were investigated from December 2006 to November 2007 in the western waters of Oman Sea. Seasonally samples of three species of these tuna and monthly samples of sardine were collected. Feeding studies on 101 longtail tuna (T.tonggol) indicated that the bony fishes were main food of this species (98.3%) and followed by random foods included cephalopods (1.7%) and crustaceans (1.7%). Among the bony fishes, anchovy (66 %) and sardines (25.9 %) were most important than the other fishes. FI and CV for this species were calculated 26.4 and 21.8 respectively. Stomach content analysis of 85 specimens of E.affinis demonstrated that bony fishes were only food for this species (100%). Sardines (49.3%) and anchovy (11.9%) were foremost food items for E.affinis. Moreover FI and CV were calculated 64.7 and 15.3 correspondingly. The stomach of 120 yellowfin tuna (T.albacares) were analyze. Results showed that bony fishes,cephalopods and crustaceans were formed food items of this species .Yellowfin tuna were preferable fed on bony fishes (87.7%) specially sardines(41.2%),flying fish(13.9%)and M.cordyla(10.4%) and followed by cephalopoda (43.8%) specifically Loligo sp.(84.5%) and crustaceans(11.2%) . FI and CV were calculated 38.3 and 25.8.Study on 320 stomachs were determined that zooplankton and phytoplankton formed food of S.sindensis. Zooplankton (crustacean and molluscs) were main food (90%) and phytoplankton (Bacillariophyceae and Dynophyceae) were least food items (10%). Copepoda (crustaceans) with 58% were preferable food and bivalves and after that bivalves (molluscs) with 14%, Bacillariophyceae (8%) and Cyanophyceae (2%) CV and FI were 30.3 and 29.4 respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Feeding Habits ; Stomach content ; Thunnus albacares ; Thunnus tonggol ; Euthynnus affinis ; Sardinella sindensis ; Species ; Tuna ; Samples ; T.tonggol ; Cephalopods ; Crustaceans ; Anchovy ; Phytoplankton ; Zooplankton
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 124pp.
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  • 10
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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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  • 11
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    Caspian brown trout (Salmo trutta caspius ) broodstock supply in south western of the Caspian Sea ( Guilan province ) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Caspian trout (Salmo trutta caspius ) is one of the migratory fish species which lives and feeds in the Caspian Sea .This species distributed in south and western of the Caspian Sea . In order to rehabilitation of the Caspian trout in western area, the operation of the project started from the beginning of the fishing season of the 20112012. Specimens of the Caspian trout obtained from beach seine cooperatives and have been transferred to the fish farm in Asalem region .Totally, 44 specimens of the Caspian trout has been caught in two month period .Most of the fishes was from Kargan roud river . The mean length and weight of the brood fishes were 67.7 cm and 3122.7 g respectively .As at present Shilat uses just the broods of the Tonekaboon region for restocking of this species ,we recommend to use the broods of the western region separately for rehabilitation of the stocks of this region .
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Caspian trout ; Salmo trutta caspius ; Broods ; Rehabilitation ; Broodstock ; Migratory fish ; Species ; Specimens
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 30pp.
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  • 12
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    Diversity, assessment and distribution of endemic and non-endemic vertebrate species of genetic resources in the Persian Gulf and Oman Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Two water bodies of the Persian Gulf and Oman Sea located in the South of Iran and different vertebrate aquatics inhabiting there consist of fishes (Osteichthyes and Chondricthyes), marine mammals, sea snakes and reptiles. A total of 860 fish species belongs to 31 orders and 142 families have been identified and reported. Amongst them, some important species have been studied from point of molecular genetics and population genetics such as croaker, silver pomfret, cobia, sardines, lanternfishes…. . On the other hand, from marine mammals a total of 10 species of dolphins, 14 species of whales and one species of dugong were identified.Also, 9 species of sea snakes have been reported from the Persian Gulf and Oman Sea belongs to 6 genus and 2 subfamilies of Hydrophidae family. It should be mentioned that no genetic studies have been done on marine mammals and sea snakes till now. In addition, a total of 5 species of sea turtles have been reported from the study area and there are few background on genetic studies for main species in the Persian Gulf.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Diversity ; Distribution ; Species ; Genetic
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 46pp.
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  • 13
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    The effects of unsaturated fat acids on reproductive indicators of penaeus indicus (Phase 1: Preparing brood of prepared juvenile shrimp of sea and pond in the controlled conditions by using natural feed) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The shrimp farming success in the future will greatly depend upon increasing supplies of healthy and high quality seed for stocking ponds. The limited and inconsistent availability of wild shrimp postlarvae together with an urgent need of establishing selective breeding programs, increased the interest in captive broods of penaeid. Many investigations have been carried out on several shrimp species world-wide. This study have been conducted on 2 shrimp groups since September (Mehr) to July (Tir) 1999 in Bandar-e-Imam southwest Iran. The wild group (SPB) prepared from Jask area and the pond group (POB) prepared from artificial ponds upon harvesting them as marketable size have been investigated. 2 groups were exposed to natural diets consisting of squid and artemia biomass in same conditions using 12 m3 concrete tanks. Stocking density was 2 piece/m2 (1F:1M). Half part of the pond bottom covered by fine sand to reduce the stress where the other part has been used for feeding. Daily ration given in 3 times by satiation method. Also reproductive performance of wild gravid brooders (WLB) were recorded as a control group. 2 examined groups well grown and around 50% of the SPM and around 30% of POB females successfully ripened a produced eggs and nauplii where almost all males of both groups were matured. Data showed fecundity is highly correlated to the TL and W of the brooders by positive trend. Considering the TL, W, Fecundity and nauplii production the WLB brooders are significantly (P=0.05) higher than 2 other groups, while the SPM broods are significantly (P=0.05) higher in hatchability. Meanwhile the survival rate from nauplii to postlarvae stage was around 30% for SMP brooders. On the other hand the growth parameters (TL, W) of the marketable size of the shrimps produced from SMP brooders were significantly (P=0.05) higher than those produced from WLB group. Since the fecundity is improvable by increasing the brood size thus the data suggest the sup.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Fatty acids ; Penaeus indicus ; Brood ; Juvenile ; Shrimp ; Postlarvae ; Species ; Squid ; Artemia ; Biomass ; Nauplii ; Fecundity
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 42pp.
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  • 14
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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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  • 15
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    Production of monosex female population of Rainbow Trout by use of 17-B estradiol as direct method (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In many species of finfish, females exhibit higher growth rates than males and achieve larger sizes. In addition, in some species, males mature before reaching marketable size. Therefore, there is great interest from the fish farmers to produce all-female stocks. In this project tried to reversing the sex of rainbow trout larvae by 17 estradiol and direct method, further more finding the optimum dose of this natural estrogen for endocrine sex reversion of Rainbow trout (O. mykiss). Four experimental treatments were designed with doses of 10, 20, 30 and 40 mg/kgf. Trout which treated with 40 mg/kgf yielded 96% female and greatest growth.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Rainbow trout ; Sex control ; Gonad ; 17-B Estradiol ; Species ; Finfish ; Females ; Males ; Growth ; Mature ; Larvae ; O.mykiss
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 32pp.
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  • 16
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    Biological studies of fishes (Clupeidae, Rutilus frisi kutum, Liza auratus, Cyprinus carpio, Chalchalburnus chalcoides, Vimba vimba, Abramis brama, Sander lucioperca & Liza saliens) of Southern Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: During the past decades the environmental status of the Caspian Sea has changed. Therefore, study on the biological structure such as: age, growth, Lm50%, feeding of fishes is necessary. In the present study the biological characteristics of some commercial important species including kilka, kutum, golden grey mullet and carp were studied during 2006-2010. Kutum, golden grey mullet and carp predominated in the catch composition of bonyfishes, representing 61.3, 29.6 and 7.6% of the total catch. The average fork lengths of kutum, golden grey mullet and carp were 38.4, 32.7 and 36.7 cm, and weights were 784.5, 411.0 and 977.0 g, respectively. The values of b in length-weight relationships were 3.02 and 2.97 for kutum and golden grey mullet indicating an isometric growth. The value b for carp was 2.89, indicating an allomertic growth. The maximum age of three species was 12 years. Von Bertalanffy growth equations were estimated as: for kutum: for golden grey mullet: and for carp: The sex ratio of three species showed that females were dominant. Spawning migratory of kutum was started in March. The gonadosomatic index value of kutum peaked in March and April. The spawning season of carp expended from March to August. The gonadosomatic index value of golden grey mullet peaked in September and then declined in November and December. Absolute fecundity of kutum, golden grey mullet and carp were 64400, 700800 and 131000 eggs, respectively. Length maturity (Lm50%) of three species were 39.07, 28.4 and 31.6 cm, respectively. The highest feeding intensity (Gastrosomatic index=GSI) for females and males were 313.9 ± 65.9 and 350.7±103.7 in October; and the lowest value of GSI were 19.4 ±59.2 and 144.1±85.04 in March, respectively. There are significant different between GSI with male and female in difference months (P〈0.05). Main prey mature of Kutum was Cerastoderma lamarki; Gastropoda and Balanus were subordinate, and Crab, Hypanis, Fish (Neogobous sp.) Algae, egg, and scale were random preys. Planktone groups comprise to Exuviaella, Nitzchia, Osillatoria, Synedra, Nematoda, Navicolla, Diatoma, Rholcosphenia were preys juvenile of Kutum. Based on ISI (Important species index), Cerastoderma lamarki and Balanus were dominant species in feeding of Kutum. The percent of empty stomach and prey dominant evaluated during different seasons by specific formula result showed that in Cyprinus carpio prey Molluscs was dominated and specific food items. Empty stomachs in winter and spring were higher and lower, respectively. The results showed that catch of kilka decreased from 22300 mt in 2006 to 16700 mt in 2008, but the CPUE increased from 1.7 mt (Vessel×Night) to 2.5 mt, due to decrease of effort, respectively. The length frequency of three species of kilka is close and the juvenile fish did not see in catch. The age frequency had the same situation as fish lower than 2 years was not in the samples of anchovy and bigeye kilka. The parameters of the von Bertalanffy growth curve were: For common kilka: L =136.5 cm, K=0.249 yr-1 and t0= -1.89 yr-1 For bigeye kilka: L =148. cm, K=0.346 yr-1 and t0= -1.123 yr-1 And for anchovy kilka: L =131.7 cm, K=0.375 yr-1 and t0= -1.243 yr-1 The exploitation rate of anhovy, bigeye and common kilka were 0.51, 0.58 and 0.6, respectively. The highest of GSI for common and bigeye was recorded in May and March, respectively. For anchovy kilka it was in July and November. Main prey of anchovy and common kilka was Acartia tonsa and for bigeye kilka it was Cypris balanus. We concluded that the ecological problems caused by Mnemiopsis leidyi as well as overfishing have been collapsed kilka stocks, particularly anchovy. Therefore, sustainable fisheries management and conservation biodiversity in the Caspian Sea are real challenges now.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial ; Growth ; Species ; Kilka kutum ; Bonyfish ; Sex ratio ; Spawning ; Gonadosomatic ; Maturity ; GSI ; Hypanis ; Neogobous sp. ; Algae ; Nitzchia ; Cyprinus carpio ; Diatoma ; Clupeidae ; Rutilus frisi kutum ; Liza auratus ; Chalchalburnus chalcoides ; Vimba vimba ; Abramis brama ; Sander lucioperca ; Liza saliens ; Fish
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 98pp.
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  • 17
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    Study of Mnemiopsis leidyi diet and reproduction in the southern coasts of 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. Mnemiopsis leidyi first appear in the Black Sea in 1980s and reached to the biomass levels up to 1.5-2 kg m2 in the summer of 1989. 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 and phytoplankton started from July to December 2002 from a total of 2 stations located Anzali and Khazarabad by METU net in the Iranian Coasts of the Caspian Sea. Experimental studies on Mnemiopsis have indicated that Mnemiopsis begins to produce eggs in the Caspian Sea, when it reaches length about 15 mm. Although eggs were obtained even from specimen with 12 mm length and weight of 0.5 g. The most abundant size of reproducing Mnemiopsis was 20-30 mm in the Caspian Sea. Average fecundity of M.leidyi in the Caspian Sea was 1174±741 eggs/day with maximum 2824 eggs/day for specimens with length group of 30-39 mm and the weight about 2.0-2.7 g. Percentage of hatched eggs was not high in experiments with M.leidyi the range from 9 to 92 % after 24 hours. The maximum produce egg of M.leidyi measured with mean 845±733 eggs/day in Salinity of 11 ppt and the minimum egg recorded with mean 2 eggs/day in salinity of 4 ppt. The results showed that the biomass of M.leidyi had some fluctuation in different months and its maximum biomass was recorded in August with a figure of 384±156 g.m2 and the minimum biomass was observed in December with a figure of 87±46 g.m2. The gut contents of Mnemiopsis leidyi showed a wide variety of prey including 84 % of zooplanktons and 16% of Phytoplanktons. The most abundance of intaked foods was Acartia (belong to Copepoda) with 34 % and the least was podon polyphemoides (belongs to Cladocera) with 0.74 %. Also 3.0 % of fish eggs and 4.2 % of Lamllibrachia were found among stomach contents. The young specimen (5〈 mm) consumed more zooplanktons and phytoplanktons comparing to adult ones. Copepoda was dominant zooplankton in the Iranian coasts of the Caspian Sea. Fecundity of Mnemiopsis showed correlation to the length and wet weight in the Caspian Sea and reproduction of M.leidyi was done small size in comparing with other area in the Caspian Sea. Salinity, water temperature and food availability is the most important factor in producing eggs in M.leidyi. It seems, that Mnemiopsis leidyi feeding has been one of the most important factor in declining zooplankton populations and Clupeonella stocks.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Experimental ; Mnemiopsis leidyi ; Diet ; Reproduction ; Species ; Ctenophore ; Phylum ; Biomass ; Pelagic fishes ; Zooplankton ; Phytoplanktons ; Copepoda ; Cladocera ; Salinity ; Temperature ; Comb jellie
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 45pp.
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  • 18
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    Biomass estimation of demersal resources in the Persian Gulf and Oman Sea by Swept area method (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Regarding to monitor of demersal resources in the Persian Gulf and Oman Sea, and also biomass and CPUA estimation of them, eleven research cruises were carried out by using R/V Ferdows-1 equipped with bottom trawl, covering the area from 49º 00´ E in the west (borderline with Kuwait) to 61º 25´ E in the east (borderline with Pakistan) from 2009 to 2011. The study area was stratified into 17 strata (A to Q) of which 10 strata (A to J) were in the Persian Gulf and 7 strata (K to Q) were in the Oman Sea, covering the depths of 10-50 m in the Persian Gulf and 10-100 m in the Oman Sea. A total of 316 stations were randomly selected and the biomass and CPUA were estimated by swept area method. In 2009, due to the bloom of jellyfish, there was some problem for sampling and therefore made some bias in our estimation. Therefore, the biomass of jellyfish was excluded from all calculations. The comparison between two regions indicated that the percentage of density of demersal fishes in the Persian Gulf during years 2009, 2010 and 2011 were 1.5, 3.7 and 1.7 times more than the Oman Sea and totally 60-80% of total biomass was found for the Persian Gulf. Also a comparison among 17 strata the highest biomass was found for K region (Sirik to Jask) in the Oman Sea in 2009 & 2011; and C & D regions (Genaveh to Dayyer) in 2010 in the Persian Gulf. The same comparison was done for CPUA of commercial, non-commercial and total in both water bodies and it was found that in years 2009 and 2011 the regions of L (Jask to Meidani) and K (Sirik to Jask) in the Oman ; and 2010 the G region (Mogham to Farour) in the Persian Gulf had the highest value of this parameter. It can be concluded that the north-west of the Oman Sea has the best condition of biomass and CPUA of commercial and non-commercial demersal fishes; and on the contrary the low values were estimated for A region (north-west of the Persian Gulf) and P region (Konarak to Ramin) in the Oman Sea. With review the mean CPUA in defferent depth layers for years 2009, 2010 and 2011, it was concluded that with increasing the depth, the mean CPUA is decreased and the lowest CPUA belongs to depths of 50-100 m. The comparison between commercial and non-commercial groups in both ecosystems, it concluded that the density of commercial species were higher than non-commercial ones; and for years 2009, 2010 and 2011 the commercial species consist of 52.2, 57.1 and 59.7 % of total biomass. In all years the Persian Gulf indicated higher values than the Oman Sea. The most abundant fishes were Rays, Catfishes, Grunts, Japanese threadfin bream, Carangids, Hair tail, Barracuda and Lizardfish for both Persian Gulf and Oman Sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial fishes ; Non-commercial fishes ; Biomass ; Catch per unit of area ; CPUA ; Sampling ; Density ; Species ; Catfishes ; Grunts ; Japanese threadfin bream ; Carangids ; Hair tail ; Barracuda ; Lizardfish
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 283pp.
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  • 19
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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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  • 20
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    Identification and density determination of juvenile fishes in Khouzestan coastal waters (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Aquatic animals possess specific biological characteristics and lifecycle. Without knowing about their biology and complete lifecycle, planning about their conservation can not be effective. Following the previous studies on fish larvae in Khuzestan coastal waters this study was done to determination catch composition and density of juvenile fishes in Khuzestan coastal waters during 2007 to 2008. Studied area included two main fisheries ground, Lifeh-Busafe in west and Bahrekan in east coasts. Monthly random sampling was carried out by using shrimp trawl net with Akhtar vessel. Juvenile fish's means the fishes that completed their larval cycle and are look like their parents but have not been matured yet. The catch mean, biomass, CPUA and the stock size of different species were estimated by using Swept Area Method. Totally 101485 caught fishes included 38 families and 63 species. The most abundant trawled fishes were Thryssa vitriostris Leiognathus bindus Ilisha melastoma Penahia macrophthalmus and Johnius belangerii .These five species contain about 80 %, the species Arius dussumieri and Cynoglossus arel 4.5% and 3.2 % respectively and the others 12% of total caught fishes. In the east coasts the species L. bindus I. melastoma T. vitriostris P. macrophthalmus and in the west coasts the species P. macrophthalmus T. vitriostris J. belangerii and I.melastoma were the most abundant. Among 63 identified fish species , juvenile fishes of 23 species were observed which contain 26.4 % of total caught fishes .the fishes Arius dussumieri and Acantopagrus latus 100%, Liza subviridis, Leiognathus lineolatus and Triacantuhus biaculeatus more than 80 % and Pomadasys stridens Lagocephalus inermis Saurida tumbil and Thryssa vitrirostris more than 50 % were observed as juvenile stage. The most abundant juvenile fishes were T. vitrirostris L. bindus and Arius dussumieri respectively. The maximum (1852 kg/km2) and the minimum (165 kg/km2) values of CPUA were estimated in west coasts in July and December respectively. The maximum (2677 kg/km2) and the minimum (153 kg/km2) values of CPUA were estimated in east coasts in June and August respectively. The biomass showed a distinct peak in June and July in east and west coasts respectively. The highest diversity index in east (2/22) and west (2.36) coasts were obtained in July. In present study the number of identified fishes is more than previous studies. Juvenile fishes spend their sensitive period of lifecycle in Khuzestan coastal waters. After growing in late spring, fish larvae enter to the juvenile stage and select this productive area as nursery ground. Increasing of juvenile fishes in July is accordance with their reproduction season in studied area. The east coasts are deeper than the west and there are some differences in hydrological characteristics due to discharging of the rivers Bahmanshir and Arvandrood in west coasts. The peaks of abundance in east and west coasts were observed with a clear time interval. The higher CPUA in east coasts can be caused due to gradual migration of juvenile fishes from west to east during cold season.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Hydrological ; Juvenile fishes ; Bottom trawl ; Catch composition ; Biomass ; Aquatic ; Larvae ; Density ; Sampling ; CPUA ; Species ; L. bindus ; I. melastoma ; T. vitriostris ; P. macrophthalmus ; J. belangerii ; Migration ; Coastal waters ; Identification
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 78pp.
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  • 21
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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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  • 22
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    Investigation of chromosome and ploidy levels of Rainbow trout produced from imported eyed eggs. (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Rainbow trout is the main cultural species of coldwater fishes in iran. Often, aquaculturists intend to breeding in order to production of lines with higher growth rate potential and disease resistant. Nevertheless in the country, no trout breeding programs, has been performed yet and most of the farms focused on the cultivation of the first(unbred) race. While European countries progressed in trout breeding techniques and production lines with higher growth through genetic manipulation (chromosomal number and type changes of fish) and/or selection and their fish products derived from this technology, including eyed eggs and so on have sold to other regions of the world(eg: Iran). In this study, some biological parameters including survival, growth, feed conversion ratio (FCR.) and chromosomal number of two juvenile groups from imported( group 1) and native(group 2) eyed fish eggs were compared. For chromosomal investigation, blood smear test and flow cytometry were performed. sults showed a significant difference (P≤5%) in growth rate of native fishes and French group Native fish feed conversion ratio (0.9) was significantly difference (P≤5%) from that of French fishes (1.15). Chromosomal analysis showed no difference in chromosome number in treatments and two fish groups were 2n chromosome. Based on the results,the fishes of group 1 had faster grow potential and gain weight in less time than that of group 2 and this has been achieved to go through the process of selection and femenizatiom without any change in number of ploidy. Whereas the ability of native fishes in food efficiency( lower FCR.) was better. However, the reduction of rearing period is the benefit and preference of cultivation of imported or origionally foreign.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Imported eyed egg ; Native fish ; Ploidy level ; Growth ; Rainbow trout ; Chromosome ; Species ; Breeding ; FCR
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 30pp.
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  • 23
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    Morphology and Phylogeny of Scrippsiella trochoidea (Dinophyceae) a potentially harmful bloom forming species isolated from the sediments of Iran’s south coast (2018)
    Details
    Publication Date: 2021-05-19
    Description: Phytoplankton cells and resting cysts of the species Scrippsiella trochoidea are regular and dominant components of the dinoflagellate flora of coastal marine waters and sediments around the world. This species is a common harmful bloom forming species in coastal waters. In this study, for the first time cyst of S. trochoidea were isolated from the sediments of southeast coast of Iran. Five strains from the germination of a single cyst belonged to S. trochoidea. In order to confirm identification of the species an excystment and encystment experiment, cyst and germinated cell morphology and plate pattern by light and electron microscopy (SEM) have been described. The nucleotide sequences of two highly diverse regions, the rDNA-ITS 1,2 and 5.8S-rDNA have been sequenced for all strains. Homologous sequences from GenBank with five Iranian strains were compared to find their phylogenetic relationship. Both NJ and MP phylogenetic and morphological analysis showed five strains of S. trochoidea from Iran were clustered with previously described S. trochoidea and Calciodinellum levantinum species, and its closest relationship was with Scrippsiella sp. strain with a 1.2-1.4% sequence divergence. Results indicate that molecular studies of rDNA if combined with morphological cyst and vegetative cells could be a valuable approach to identification and taxonomy of calciodinelloideae dinoflagellate.
    Description: Published
    Keywords: Calciodinellum levantinum ; Cyst ; Molecular analysis ; Morphology ; Phylogeny ; Scrippsiella trochoidea ; Sediment ; Vegetative cell ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.252-270
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  • 24
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    Biological control of aquatic weeds by Grass Carp in Kelvin River (Scotland) (2018)
    Details
    Publication Date: 2021-05-19
    Description: Biological control of aquatic weeds has raised much interest because of the sudden and often short-lasting effects of mechanical and chemical controls. The use of grass carp (Ctenopharyngodon idella) is mainly for the production of food and control of aquatic weeds. The aims of this study were to assess the degree and duration of weed control achieved at two stocking densities (150 and 250 kg ha-1) and to determine the change of fish size and their survival in Kelvin River. Analysis of variance showed that both stocking densities of grass carp caused a significant (p 〈 0.001) reduction of aquatic weeds. Results showed that free floating and submerged weeds by their soft tissues are often regarded as amongst the palatable species than emergent and floating-leaved species. Experimental results showed that about 60% fish survival with substantial weed reduction by the end of first year after releasing. Results showed that the average weight of grass carp in both 150 and 250 kg ha-1 at l, 2, and 3 years after releasing were 930, 1680, 2350, and 840, 1550, and 2200 grams respectively. Experimental results showed that weeds control by grass carp is temperature dependent and, to be effective, requires water temperature in excess of 16ᵒC for at least three months of the year.
    Description: Published
    Keywords: Biological ; Mechanical ; Chemical ; Aquatic ; Weeds ; Grass Carp ; Ctenopharyngodon idella ; Size ; Survival ; Tissue ; Species ; Weight ; Temperature
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.53-64
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  • 25
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    Physicochemical characteristic of Penaeus indicus ponds in coastal area of Gorgan bay (Mazandaran province) (2018)
    Details
    Publication Date: 2021-05-19
    Description: A series of studies were conducted to evaluate the possibility to culture Penaeus indicus in coastal area of Gorgan bay concerning the proper climate potential of Behshahr zone during summer till autumn 2000. Thirty two water samples were collected from four shrimp ponds for further laboratory studies to measure some physicochemical parameters such as: temperature, pH, salinity, transparency, nitrogen, phosphorus, D.O. according to the Russian Standard (1988). As a result, the range of water temperature, pH, salinity and trasparency were 24.5-29.0°C, 8.02-8.18, 31.5-43.5 ppt and 21-50cm, respectively and the fluctuation concentration of D.O, NH4+, NO2-, PO4-3 were 3.8-9.5 ml/l, 0.0022-0.015, 0.0021-0.1210 and 0.0145-0.3710 mg/l, respectively. As a conclusion, this shrimp species can be easily adopted with different climate, so this region is suitable for shrimp culture as view point of temprature and salinity. For demonstration of this issue, 1he semi-intensive shrimp culture has been successful. Also the toxic material such as ammunia and nitrite did not show any restriction for shrimp culture.
    Description: Published
    Keywords: Penaeus indicus ; Physicochemical ; Sample ; Shrimp ; Temperature ; pH ; Salinity ; Transparency ; Species ; Culture
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.111-122
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  • 26
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    Some biological Aspects of 8 marine species of Hormozgan (2018)
    Details
    Publication Date: 2021-05-19
    Description: A Study was carried out on spawning season, feeding and some environmental conditions of 8 aquatic species of Hormozgan sea waters from Oct. 91 to Mar. 93. The results showed that spawning peak for otolithes ruber, Psettodes erumei, Pomadasys kaakan, Arius thalassinus and Arius tenuispinis occured in spring, for Pampus argenteus and Parastromateus niger occurred in summer, and for Sopia pharaonis occurred in Autumn. Two summer spawner and two Arius species were appeared Lo he very gluttonous and other spring spawner species showed rather less tendency for feeding P.argenteus appeared to eat copepod and rhizosolenia and P.niger stomach contents included nematod and annelid worms and also copepod, P.erumei feeds on small fishes and others eat crustaceae and small fishes too. High growth coefficients for P.argenteas and A.renuispinnis a medium growth coefficient for P.niger and low growth coefficients for other species were obtained. Except for S.pharaonis, geographical distribution did not differ singnificantly (α〈0.05). The zooplankton and phytoplankton were identified with different monthly and locally densities Depth pH and salinity had little variation in spawning seasons. mean dissolved oxygen and water depth temperature ranged between 3.48 to 6.05 and 21.85 to 31.05 respectively (α 〈0.05).
    Description: Published
    Keywords: Aquatic ; Species ; Otolithes ruber ; Psettodes erumei ; Pomadasys kaakan ; Arius thalassinus ; Arius tenuispinis ; Pampus argenteus ; Parastromateus niger ; Sopia pharaonis ; P.argenteus ; Rhizosolenia ; P.niger ; P.erumei ; Spawning ; Feeding ; Fish
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-13
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  • 27
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    The feeding study of Largehead Hairtail (Trichiurus lepturus) in Oman Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: Largehead hairtail (Trichiurus leptunts), an important commercially species of the family of Trichiuridae, is found in abundance in the Persian Gulf and the Oman Sea. The feeding of this fish was studied from November 1995 to October 1996 in Meydani area, an area of the Iranian waters of the Oman Sea which is placed between Jask and Chahbahar parts. Stomach content of 587 specimens of hairtail were studied and classified as full, semifull and empty. The frequency of full, semifull and empty stomachs were 15%, 17% and 68% respectively. Minimum feeding obtained in April and March and maximum in August. The Vacuity index (CV) was 68. I and food prefect (Fp) of stomach content assigned which was tor eaten fishes 70.1%, crustacea 16% and molluscs 13.9%, so fishes were determined as main food. The most frequent food item of stomach content was anchovey (Stolephorus sp.)
    Description: Published
    Keywords: Commercially ; Largehead Hairtail ; Trichiurus lepturus ; Species ; Fish ; Stomach content ; Specimens ; Vacuity index ; FP ; Crustacea ; Molluscs ; Anchovey ; Stolephorus sp. ; Abundance ; Feeding
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.65-72
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  • 28
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    Fish culture experiments with Abramis brama orientalis in earthen pond to diversify aquaculture fish composition in Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: On two consecutive culturing period, the Caspian sea Bream fingerling average individual weight 30g stocked in a fish pond at the rate of 3000 unit per ha to rear through mono-culture method. Also in the other test carp pond fish comprised of 70% bream, 20% silver carp and 10% grass carp totally 4000 unit per ha Stocked to examine poly-culturing with bream species. The test replicated in second year by the same manner but the only difference was the weight of stocked bream fries which were 4g on average. Chemical fertilizer and chicken manure applied as warm water fish culturing technique demand. Carp grow out feed pellet supplemented to the ponds. Fish health, water quality and growth rate monitored. The minimum water temperature were 9 ֯C and maximum 33 ֯C recorded. Dissolved O2 = 5-7 mg/l, pH = 7-8.62 in the first year by mono-culturing method the bream achieved 200 gr by species on average. But with poly-culture system the bream gained 250g weight. Also individual species reached 580g. In second year test the pond with mono-culture method bream with the weight of 180 g produced. With poly-culture method the target species accomplished 221 g on average, also 300g appeared in the yield, Bream mortality didn't occurred during culturing. The experiment demonstrated poly-culturing of bream with Chinese carps by semi-intensive method produced satisfactory results. We suggest the bream could be enhanced in the list of fish species of Iran and able to promote sustainable aquaculture development.
    Description: Published
    Keywords: Fish ; Culture ; Abramis brama orientalis ; Earthen pond ; Diversify ; Aquaculture ; Average weight ; Crap ; Pond ; Poly-culturing method ; Silver carp ; Grass carp ; Species ; Weight ; Fries ; Chemical fertilizer ; Culturing technique ; Growth ; Feed ; Pellet feed ; Temperature ; Yield ; Mortality ; Chinese carps ; Aquaculture ; Fingerling
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.49-62
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  • 29
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    Spawning season and maturity stages of Potamon persicum in Jajroud River (2018)
    Details
    Publication Date: 2021-05-19
    Description: Jajroud river with 140km length, inhabits various species of aquatics of which one of the main identified one is freshwater crab belongs to POTAMIDAE family with scientific name of Potamon persicum. In this study, 388 specimens from 5 sampling stations (Latian dam, Taraghion, Khojir, Giahan daroie and Mamloo dam) were collected since November 1998. All samples were transferred to the laboratory for reproduction studies and determination of spawning season, with studying the maturity stages of gonads and external eggs. The results showed that the spawning season of this species occurring in middle of spring, it was also found that P. persicum is a total spawner. The external maturity (of eggs) was classified to 7 stages. On the other hand the maturity stages of gonad was recognized in accordance with the color, size and egg diameter and classified to 5 stages.
    Description: Published
    Keywords: Spawning ; Maturity ; Potamon persicum ; Freshwater crab ; Species ; Aquatic ; Potamidae ; Gonads ; Eggs ; P. persicum
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.69-86
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  • 30
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    Culturing Rutilus frisii kutum, a Fish Species of the Caspian Sea, to Marketable Size (2018)
    Details
    Publication Date: 2021-05-19
    Description: Rutilus frisii kutum, belonging to family Cyprinidae, was reared using mono-culture and poly-culture (combined with Chinese carps) methods. The culturing process were carried out in earthen ponds from 22 May to 23 October in 1992 and 1993. Physical and chemical factors, transparency of the water, sanitary control and growth of the fishes were surveyed monthly. Nitrate and phosphate fertilizer and animal manure (cow and chicken) were applied to facilitate the growth of phytoplanktons and benthoses. Fertilizer usage were regulated according to the results of hydrochemical analyses and the transparency of the water. The fishes were fed on artificial food, concentrated pellet specially made for Rutilus frisii kutum nutrition (KF). Their diet were calculated using the body weight percentage (biomass) as well as their appetite. The essential characteristics of the water including water temperature (15°c - 27.64°c), pH (6.9 - 8.74), dissolved oxygen (4.79 - 7.25 ppm) and trasparancy of the water (often varied between 20 - 30 cm) were measured in the first year. Mean weight of the young fishes in the ponds were 30 gr; after six months the fishes caught in mono-culture ponds had reached 177 gr. By poly-culture method fishes reached 185 gr, and their maximum weight were 300 gr. In the second year the ponds were stocked with young fishes weighing 7 gr. When the fishes in mono-culture and poly-culture ponds were caught, they had reached 168 gr and 192 gr, respectively. Their maximum weight were 250 gr.
    Description: Published
    Keywords: Rutilus frisii kutum ; Cyprinidae ; Chinese carps ; Physical ; Chemical ; Growth ; Phytoplankton ; Benthos ; Hydrochemical ; Fish ; Body weight ; Species ; Size
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.49-58
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  • 31
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    By-catch composition of small-scale shrimp trawlers in the Persian Gulf (Hormuzgan Province), Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: Fishing vessels equipped with bottom trawls cause high amount of by-catch and discards. We investigated the catch composition and by-catch percentage in October - November 2002 during shrimp fishing season in Hormuzgan Province waters. The studied area was located in DarmSoorkh area, east of Hormuz Island and Toola area. Sampling was done using wooden fishing dhows. During shrimp season, 36 hauls with a total catch of 6050kg were treated. The catch composed of 88 species belonging to 50 families of which 67 species were bony fish from 38 families, 9 species were cartilaginous fish from 6 families, and 3 species were mollusks from three families and also 9 species of crustacean were found belonging to 3 families. The percentages of different groups of by-catch and target catch (shrimp) were 49.4% small discards, 18.7% large discards, 4.7% commercial species and 27.2% shrimp. The ratio of total by-catch to shrimp was estimated to be about 2.7 times that of the shrimp.
    Description: Published
    Keywords: Discard catch ; Shrimp ; Fishing ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.129-138
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  • 32
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    Comparison of muscular tissue concentration of heavy metals in Sharpnose stinger (Himantura gerrardi) and Bigeye scade (Selar crumenophthalmus) of the Persian Gulf (2018)
    Details
    Publication Date: 2021-05-19
    Description: We assessed concentration of heavy metals (Cu, Fe, Hg and Zn) in the muscular tissue of benthic species Himantura gerrard and pelagic species Selar crumenophthalmus caught from the Persian Gulf during winter 2008. After biometrical measurements, the muscle tissues of 51 randomly selected samples were separated from 86 stations. Specimens were digested using the wet method and the concentrations of Cu, Fe and Zn were determined using Atomic Absorption Spectrophotometer (flame method) and also concentration of mercury was determined using Mercury Analyzer device. The mean concentration of heavy metals in muscle tissues of Himantura gerrardi were as follows: Fe: 74.78; Hg: 0.77; Zn: 875.99 and Cu: 3.5. However, these values for muscle tissues of Selar crumenophthalmus were: Fe: 25.07; Hg: 0.20; Cu: Zn: 15.54 and Zn: 2.31f.lglg dry weight. Results showed that concentration of the selected heavy metals in H gerrardi, were significantly higher than S. crumenophthalmus (P O.OS).
    Description: Published
    Keywords: Fish cartilage ; Bony fish ; Selar crumenophthalmus ; Himantura gerrardi ; Pollution ; Muscular ; Species ; Heavy metals
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.85-94
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  • 33
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    Short communication: Identification of by-catch species of tuna purse seiners in Iranian waters of Oman Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: One of the most visible direct impacts of fishing is the capture of non-target species, known collectively as bycatch. By-catch includes species that are unwanted and discarded (discards) and species that are retained and sold (byproduct) (Stobutzki et al., 2003). Although tuna purse seine fisheries have been shown to be selective, leading to lower levels of by-catch than other fisheries (Alverson et al., 1994; Kelleher, 2005), several species can be incidentally caught and, in some cases, discarded at sea. These include vulnerable and sensitive species such as turtles, mammals, and sharks (Minami et al. 2007; Romanov, 2008b). Tuna purse seine fisheries probably apply the most intensive direct human impact on the tropical epipelagic ecosystems in all oceans. Because of the worldwide scale of purse seine fisheries, an assessment of their impact on associated and dependent species is essential (Romanov, 2002a).
    Description: Published
    Keywords: Thunnus tonggol ; Thunnus albacares ; Katsuwonus pelamis ; By-catch ; Tuna ; Purse seine ; Identification ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.239-244
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  • 34
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    Decapod Crustaceans associated with the sponge Sarcotragus muscarum Schmidt, 1864 (Porifera: Demospongiae) from the Levantine coasts of Turkey (2018)
    Details
    Publication Date: 2021-05-19
    Description: The present study was carried out to determine the Decapod Crustaceans fauna in association with Sarcotragus muscarum Schmidt, 1864 from the Levantine Sea coasts of Turkey studied between 13 September 2005 and 07 October 2005. As a result of the present study, a total of 711 specimens belonging to 12 decapod species were identified. Among the species determined, Synalpheus gambaroloides (Nardo, 1847) was the most dominant species represented with 616 individuals and dominance value of 86.64%. Alpheus rapacida de Man, 1908 is firstly encountered in association with the sponge species.
    Description: Published
    Keywords: Associated fauna ; Diversity ; Sarcotragus muscarum ; Decapod ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.286-293
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  • 35
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    Biology of the Myctophids (2018)
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    Publication Date: 2021-05-19
    Description: The "Stock Assessment of Mesopelagic Resources (Myctophids)" project was carried out in the Oman Sea during 15 mounths. In this period, 7 cruises were done and by carrying out 100 hauls, the necessary biological data were collected. It should be mentioned that the studied area was restricted from Rasokuh (57°00' E/25°10'N) in west to Gwatar (61°25'E/25°48'N) in East and water border line of Iran and Oman in South. The Benthosema pterotum was identified as dominant species, This species lives in two different layers, namely D1 (80-130 m) and 02 (250-350 m), during daytime, and before sunset, migrating towards the surface and forms N1 layer. The results show that B. pterotum spawns throughout the year, with 2 peaks, in the end of summer, and end of winter. Myctophids are Zoophague, and Hairtails and Squids, are their main predators.
    Description: Published
    Keywords: Squid ; Myctophids ; Biology ; Benthosema pterotum ; Species ; Hairtail ; Zoophagous ; Surface
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.37-46
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  • 36
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    Infection of pearl, oyster pinctada margaritifera with Cliona sp. and subsequent destruction of oyster shell (2018)
    Details
    Publication Date: 2021-05-19
    Description: One of the major problems of pearl oyster cage culture in the persian Gulf is boring and fouling organisms attacking oyster under culture, The infected oyster lose thier commerical longevity, heathy resulting in a decrease in pearl production capability. P. margaritifera is one of the rarest species of pearl oysters in the persian Gull. As such much research arr now being undertaken to study the parasites and thier relationship with host organism in an eftort to protect it's stocks. Cliona sp. has been found to he the most Common parasite, causing much destruction to the oysters. In this article the extent of oysters infested with this parasite and subsequent destruction of oyster shells is described.
    Description: Published
    Keywords: Cliona sp. ; Pinctada margaritifera ; Organisms ; Species ; Parasites ; Destruction
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.25-33
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  • 37
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    Hydrology and hydrobiology and environmental pollutions in lower than 10 meters depths of Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The present project in related to survey of factors and hydrology and hydrochemical features (water temperature, dissolve oxygen saturation, pH, clearance, salinity, nitrogen, phosphorus and silicon) hydrobiology (zooplankton, phytoplankton, macrobenthos) and survey of bio environment pollution (oil, heavy metal, detergent) executed in lower 10m in different water larger in southern Caspian Sea in 2002-2003. For sampling 8 lines number were vertical on coast that selected from Astra in west to Gomishan in east in southern Caspian Sea basin. The result indicated the average physical factors such as pH were 8.11 and salinity12.12 ppt ,and disolve oxygen6.7 mg/l. Average chemical factors such as NO2 , NO3 and NH4 were 1.2 µg/l, 25.7 µg/l, 13 µg/l respectively.Total nitogen and organic nitrogen and inorganic nitrogen were 690.2 µg/l , 667.6 µg/l , 41.6 µg/l. Average silicat were recrded 266.35 µg/l . Total Phosphorus was observed 37.35 µg/l and average of organic Phosphorus concentration was and 20.25 µg/l .Average of Total organic matter (T.O.M) was 4.98% maximum amount were observed in Lisar and minimum in Nooshahr . Concentration of heavy metal during sampling were respectively ,Fe〉Mn〉Zn〉Cr〉Ph〉Co〉Cd〉Cu. Maximum concentration of Fe were determined in winter in Nooshahr and Babolsar respectively 13/3 µg/l 17/1 µg/l. In many stations and different Season, the amount of heavy meta were lower standard of in marine water. The concentration of oil hydrocarborate ( PAHs) in autumn was 0/13 ppb and in winter 0/12 ppb. The amount of ( PAHs) in Southern Caspian Sea were Lower than other parts of Caspian Sea. The average of detergent concentration ( LAS) was 0/036 µg/l that was two fold higher than determined in 2001. Total 107 species of phytoplankton belong to 5 phylum were identified. The numbers of species of phytoplankton groups were respectively, chrysophyta (42 species), cyanophyta (17 species), pyruphyta (17 species), chlorophyta (21 species) and euglenophyta (9 species). The maximum diversity of phytoplankton observed in summer and minimum in autumn. High diversity of chrysophta and cyanophyta observed in summer and phyrophyta and chrlophyta in spring. The composition of phytoplanhkton groups were respectively, chrysophyta (70%), phyrophyta (9%) and chlorophyta (7%) and euglonophyta (1%). Maximum density of phytoplankton was observed in autumn and minimum in winter. Total 19 species of Zooplankton were identified. Maximum diversity was observed in summer and minimum in winter. Zooplankton changes during sampling, showed amount of density of zooplankton in 5m were more than 10 m depths. Total (17 species macrobenthos were identified. The composition of macrobenthos groups were respectively , Annalida (92/7% ) , Bivalvia (2/7%) gumarida (108%) cumacea ( 1/5%) , Balanidae 103% . max . density were observed in Astara and min . in Sefied roud Average of density were 1218 0/851 ind /m2 and biomass 14 15 g/m2 High density were recorded in autumn and low density in winter . Correlation of phytoplankton and zooplankton with physicochemical parameter and also relation between total organic matter and sediment grain size were calculated.Ecological indicies (simpson diversity evenns diversity and shanoon-wiever diversity) were calculated for macrobenthos. Data were shown impact of cetenephora (Mnenemiopsis leidyi) on zooplankton and phytoplankton and macrobenthos density.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Phytoplankton ; Zooplankton ; Macrobenthos ; Heavy metals ; Pollution ; Oil pollution ; Detergent ; Hydrology ; Hydrochemistry ; Species
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 111pp.
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  • 38
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    Increase production of carp species per unit area by Chinese method (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Carp ; Species ; Area ; Chinese method ; Fish ; Increase production
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 32pp.
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  • 39
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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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  • 40
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    Geographical distribution of commercial bony fishes in Iranian waters of the Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The beach seines catch and effort data from 1996 to 2011 categorized in four periods and used in this research. Geographical coordinates of beach seines determined by portable GPS and distribution maps of important and commercial species prepared by catch per unit effort (CPUE). The concentration of beach seines in the western coast of Golestan province, Kiashahr area and eastern part of Anzali was more than another part. The daily effort in Kiashahr and Anzali area was very high, thus the fishing stress in these areas was more than another part of Iranian coastal waters of the Caspian Sea. The number of species in catch composition increased from east to west and the beach seines of Guilan province had total of commercial species, but the number of commercial species rarely was five species in Golestan province and especially in eastern coast. Relative frequency and distribution of Kuttum in the east Babolsar area and then between Sepidroud and Anzali lagoon were more than another part. The ISI index of Kuttum was high in all of the area except east coast of Golestan province. The main distribution of Mullets determined in the western coast of Golestan province and the Amirabad fishing area and in these areas, the ISI index of Mullets was high. The main distribution area of common carp determined in east coast of Golestan and the ISI index of common carp was very low in other parts. Density and distribution of Kolmeh were high in eastern and western coasts of Iranian waters of the Caspian Sea and the density of this species was very low in Mazandaran province. The density of Zander was very high in surrounding of Sepidroud River and Anzali lagoon. The ISI index of commercial species in Guilan province was more than other provinces except Kuttum, mullets and common carp.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Geographical ; Commercial ; Bony fishes ; CPUE ; ISI index ; Distribution map ; Species ; Fishing ; Kuttum ; Mullets ; Common carp ; Density
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 74pp.
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    Cytogenetic study of four important species of the genus Barbus in Iran (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Chromosome number and karyotype of four important Barbus species of Iran were analysed. Thirty individual of B.grypus, 30 from B.sharpeyi, 28 of B.esocinus and 44 of B.pectoralis weret ested. To provide the chromosomal spreads, the kidney and gill arches of fish were sampled according to Bloom & Kligerman (1977). Barbus sharpeyi diploid model of chromosomes was 2n=98 containing 3 pairs of metacentric, 23 pairs of submetacentric,2 pairs of subtelocentric and 21 pairs of acro & telo- centric. Barbus grypus diploid model of chromosomes was also 2n=98. It contains 1 pair of metacentric, 22 pairs of submetacentric, 1 pair of subtelocentric and 25 pairs of acro & telocentric chromosomes. Barbus esocinus diploid model of chromosomes was 2n=98. It contains 7 pair of metacentric, 13 pairs of submetacentric, and 29 pairs of subtelo,acro & telocentric chromosomes. Barbus pectoralis diploid model of chromosomes was 2n=98. It contains 6 pair of metacentric, 16 pairs of submetacentric, and 27 pairs of subtelo,acro & telocentric chromosomes.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Cytogenetic ; Species ; Gene ; Barbus ; B.grypus ; B.sharpeyi ; B.esocinus ; B.pectoralis ; Barbus pectoralis
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 61pp.
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  • 42
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    Identification of native fishes of west Azarbaijan province phase 2 (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The aim of this research was to identify the species of freshwater fishes in the water rssoureces located at Urmieh Lake and Zagros catchment area of West Azarbaiigan Province . Sampling was done seasonally with the determination and selection of sampling station on main and secondary branches of different rivers including ; Zarineh rud , Simineh rud , Mahabad chay , Shahr chay , Nazlu chay , Baranduz chay , Godar and Zab river . Fish samples catched with different tools include Electroshoker , Cast net and buy from local fisherman, fixed in 10 % formalin and transferred to the laboratory for biological and identify hnvestigation . 42 fish species belonging to 7 family comprising of Syprinidae , Balitoridae , Cobitidae , Siluridae , Poeciliidae , Salmonidae and Mastacembelidae have been identified . Among them Syprinidae family with 32 species had a highest diversity .
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Identification ; Fish ; Native fishes ; Freshwater ; Syprinidae ; Balitoridae ; Cobitidae ; Siluridae ; Poeciliidae ; Salmonidae ; Mastacembelidae ; Species
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 99pp.
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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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    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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  • 45
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    Study on propagation and breeding of Hamoun fish (shizothoraxzarudnyi) to one gram weight in earthen pond (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Hamoun fish, Schizothorax zarudnyi, is an indigenous species of the eastern waters of Iran, which is exclusively found in this region. However recently drought occurrence in the Chahnimeh reservoirs (a semi natural water body) making them vulnerable to extinction. As an appropriate action to address this problem and according to the 3 side contract between Italian Government – UNDP - Islamic republic of Iran Government and the Italian government financial support to reduce poverty in the Province of Sistan-Baluchestan through the reinforcement and dissemination of aquaculture activities the project was developed at the Hamoun Research Unit by the Chahbahar Fisheries Research Center to record the breeding normative of 1 g weight larvae for restocking and other researching purposes. 331 broodstocks of the indigenous species Shizothorax zarudnyi weighing 800-2450 g were collected from the Chahnimeh reservoirs in early autumn, 2006. From 5/3/2007 ( the project is supported and communicated on 2010) , Ovulation was stimulated with three stimulators; pituitary extract (3-6 mg kg-1 body weight), GnRH-A (20-30 mg kg-1 body weight) and anti dopamine (10-15 mg kg-1 body weight) that was given in 2-3 doses to breeders. Of 169 injected breeders , some were injected On mid March of 2007 (12-13 ºC water tempreture) responded to the injection 25% ,while the rest were injected On April of 2008 (14-16 ºC water tempreture) responded to the injection 65%. In the present project of 167 breeders 82 were female and 87 male. Totally 30 female breeders released their eggs in different stages. 20 female breeders released their eggs completely, 3 breeders released half of their eggs and 7 released 1/3 of their eggs. The male breeders just injected in the final dose of hormontrapy and all were ready for releasing sperms however the ovulation in female breeders occurs between 353-428 h ºC and after the final dose of injection. Ripe eggs were stripped from the females and fertilization was done by the dry method. Fertilized eggs were transferred to veis incubators and troughs. Incubation period for eggs differs and larvae hatch out after about 910 days at an average water temperature of 12.5 °C. Maintained at 13-14 °C, complete absorption of yolk sac in Shizothorax zarudnyi larvae occurred after 5-8 days. Larvae were fed with a mixture of powdered milk and egg yolk in this stage followed by decapsulated Artemia cysts and nauplii of Artemia and then on formulated starter diets used for carps . Because the ponds were not ready, larvae were maintained in troughs for about ten days before they were transferred to two 1200 m2 earthen ponds where they reached a body weight of about 1 g. They were then handed over to the Iranian Fisheries department in the region. Larvae were fed with the starter feed SFCO in the earthen ponds. About 350 thousand larvae were stocked in two earthen ponds. Based on the results of present study and other studies we may conclude that artificial breeding in Schizothorax can be successfully achieved at 14-16 ºC in flow through systems using hormone therapy (combination of GnRha and anti dopamine) and larvae could be easily cultured in earthen ponds. However this species exhibits lower growth rates as compared to carps its high expenses could have an important role in economical feasible.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Economical ; Hamoun fish ; Schizothorax zarudnyi ; Breeding ; Species ; Aquaculture ; Temperature ; Female ; Eggs ; Hormontrapy ; Sperm ; Ovulation ; Larvae ; Fisheries ; Earthen ponds
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 71pp.
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  • 46
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    Several fish species carp culture with Chinese black carp to increase diversity in warm water fish farms (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The objective of this study was to investigate the effects of black carp introduction in chines carp poly culture as well as its effect on the growth, survival rate and production of chines carp species. This study conducted in two consecutive year. The period of culture in first year was during Jun 1 until Des 5 ,2009 and in second year it was from Jun 4 to Dec, 1,2010 .The experiment were started by selecting 9 earth end pond each with 800 m2 area and was performed in triplicate with 2 treatment and one control , each year .The ponds were treated by liming and fertilizer before filling water and then stocked with 3000 chines carp ( 140 Silver carp , 42 Grass carp , 42 Common carp and 25 Bighead carp ) while the number of Black carp in treatments 1, 2, 3 and 4, respectively, 250, 500, 75 and 125 pieces in Ha, blackcap was added to the control species respectively . The number of fish species harvested at end of culture in treatment 1, 2 and control .The total fish species harvested at the end of first year was 2276 out 1904 species released. The number of fishes catch in treatment 1,2 and control were 637,658and 573 species. the statistical analysis showed that average weight of black carp were 407±150 gr in treatment 1, 234±121gr in treatment 2 with the minimum and maximum weight of 242 and 780 gr in first treatment as well as 110 and 750 gr in second treatment the production of black carp in first treatment were 42 kilogram per hectare and 60 kilogram in second treatment. The growth rate were higher in second treatment than first one. In second year the investigation repeated in triplicate with treatment3, 4 and one control .The total stocking density in treatment 3,4 and control were 665,633, and 574 pieces. Statistical analysis showed that total weight of black carp in third treatment was2049 ±614gr and in forth treatment was 2361 ±60 gr where the minimum and maximum values were 3115 gr and 1025 gr respectively. The survival rat of black carp in treatment3 higher than in were treatment 4 while the growth in treatment 4 was higher treatment3.The total production of black carp in treatment 3 and 4 were 123 and 181kilogram per hectare respectively. The ANOVA test conducted for grass carp revealed that treatment 4 is significantly difference with treatment 3 and control. While for silver carp the treatment 4 is significantly difference with treatment 1 and control while for Big head carp the treatment 4 was significantly difference with control at 5% level (P〈 %5) .On second year the black carp reached to acceptable market size which could be compatible with other carp such as common carp and grass carp comparative analysis between different stocking density indicate that the stocking density with 125 pieces showed the highest positive effects.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Fish ; Species ; Carp culture ; Chinese black carp ; Diversity ; Warm water ; Growth ; Survival rate ; Silver Carp ; Grass carp ; Common carp ; Bighead carp ; ANOVA
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 111pp.
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  • 47
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    Determination of formaldehyde in 5 species of persion Gulf fish as an indicator of deterioration (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In This study formaldehyde concetration were examined in 5 species of persian Gulf by schryer test . These speciese were "Silver pomfret" (pampus argenus) " brushteeth lizard fish " , (saurdia tubil), "Barred spanish Macerel " (sconbermurus commerson)" sardinella longiceps " and Green tiger shrimp (penaeus semisulcatus) , the rate of formaldehyde concen tration determined in three different temperture storage as 0c , - 20c. -40c. 1 – The results indicated formaldehyde in the Muscle of fish. 2 – The level of formaldeyde concentration obtained in this species have been compared and discussed. 3 – The Flucation in forma dehyde concentration in this species dose not show the same pattern. 4 – Using the schryr test the shelf life for each species were calculated. The longest shelf life were found to be belong to sliver pomfret and shortest to be belong to lizard fish . T.V.N. test in this study as a subsidary contrul test.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Determination ; Formaldehyde ; Species ; Fish ; Saurdia tubil ; Pampus argenus ; Sconbermurus commerson ; Penaeus semisulcatus
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 47pp.
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    Algal mass Culture and Survey of Economic Aspects Emphasis on Green and Blue green Algae (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The Isolation , Purify , semi mass culture and mass culture of algae was started in bony fishes research center of Guillan from 2001-2004.during this survey 39 species of algae stock remained that all of them were pirified. Some of economic valuation of algae were studied ,forexample: food for aquaculture , protein, lipid and toxin extraction and antibacterial property. The result showed that Rodomonas sp. Initiate the most of growth and survival for Daphnia magna because this species have a lot of unsaturation fatty acid (w3) , also the species of cyclotellasp. was fed better than other algae by silver carp in this survey . amount of toxin was a little in most of algae. The species of Anabaena spp1. , Anabaena flos-aquae have Antibacterial property but Anabaena bergii, Nostoc caraneum and Oscillatoria affricanum have antifungal property.the both Antibacterial and antifungal property observed in Anabaena variabilis , Anabaena spp2.and Anabaena spp3.amount of protein in green and blue-green algae wasrespectively 51±8 and 60±10 percent of dry weight . Total lipid amount was 12±0.4 , 8±0.3 and 2±0.8 percent of dry weight respectively in chlorella vulgaris, Scenedesmus obliquus , Anabaena flos- aquae.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Green algae ; Blue-green algae ; Mass ; Culture ; Economic value ; Anabaena bergii ; Nostoc caraneum ; Oscillatoria affricanum ; Species ; Bony fishes ; Chlorella vulgaris ; Scenedesmus obliquus ; Fatty acid
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 109pp.
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    Silurus Linnaeus (2018)
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    Publication Date: 2021-05-19
    Description: Published
    Keywords: Silurus Linnaeus ; Silurus Linnaeus, 1758 ; Silurus glanis Linnaeus ; Silurus glanis Linnaeus, 1758 ; Siluridae ; Family ; Species ; Genus ; Fish
    Repository Name: AquaDocs
    Type: Report , Not Known
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  • 50
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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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    Identification of Kerman Fishes (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study was performed as a research program in Agricultural Research center of Kerman since 2000. During one year identification of fish in qanat basins of Markazi desert and Sirjan desert was carried out. In this study Electroshoker and salik net with o.5 and 1 cm network and padel net with 1cm were used to catch the fishes from 73 series of qanat. Parameters estimated in qanats (pH, Weather Temperature, Oxygen , Ec,...) Specified in sum 767 from fishes which were in 2 order 3 family and 3 species as: 1-Order: Cypriniformes. Family: Cyprinidaea Species: Capoeta damascina (Valenciennes, 1849) family: Balitoridaeb species: Schistura sargadensis (Nikolskii, 1900) 2-Order: Cyprinodontiforms Family: Poecilidaea Species: Gambusia affinis (Baird and Girard, 1853)
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Agricultural ; Qanats ; Fish ; Capoeta damascina ; Gambusia affinis ; Schistura sargadensis ; pH ; Weather Temperature ; Oxygen ; Species ; Cypriniformes ; Cyprinidaea ; Balitoridaeb ; Cyprinodontiforms ; Poecilidaea ; Identification
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 47pp.
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  • 52
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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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  • 53
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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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  • 54
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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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  • 55
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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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  • 56
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    Stock assessment of bonyfishes in the Iranian water of the Caspian Sea ( 2001 2002 ) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: For gathering of data on biometry and catch statfstics, 5, mobile working group in the regions of Anzali , Kiashahr , Noshahr , Babolsar and Torkaman . Were involved from the start to the end of fishing season. After gathering,data Were intered to the computer based on species. For data analysis different methods Were undertaken sach as Bertalanfy equation for growth parameter Beverton and Holt for total mortality rates, pauly's imperical model for natural mortality rate and cohort Analysis for biomas estimation. The total recorded Catch in 2001 and 2002 was 10529 and 9566 tonnes. Totall catch with taking into account of pauching . estinmated 16200 and 15200 tonnes .total catch of Katum in 2002 had 1200 tonnes decrease with comparison of last year. Biomass of kutum in IRanian coastal Water of the Caspian sea in 2002 estimated about 15000tonnes. The catch of golden mullet in 2001 and 2002 was estimated 4218 and 6183 tonnes.that about 29%-38% of the catch of this species was undersize .The biomass of golden mullet estimated about 16400 tonnes. The small nose mullet in 2002 comprise 9% of mullet catches. The catches of common carp in Anzali region was very low .but stocks of this species in Gorgan region is in better condition which.Most of catches of this species were fished illgally in the Gorgan bay and Gomishan coastal creek. The biomass of this species was estimated 1140 tonnes Most of catches of the roach.were fished illgally .Totall catches of this species in 2002 were estimated about 738 tonnes. The catch of pickperch in 2002 were estimated about 30 tonnes.Most of the chatch of pickperch was immature and undersize. Appooximattelly all of the catch is due to releasing of fingerling of this species by fishery company. Totall catch of bream in 2002 was estimated 38 tonnes that most of which was immature and undersize.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Season ; Species ; Growth parameters ; Stock assessment ; Bonyfishes
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 170pp.
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  • 57
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    Study on Macrobenthic communities in the range of fish cage-culture area (before breeding) in the southern Caspian Sea (Mazandaran coast-Kelarabad) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The abundance and biomass of benthic macroinvertebrates were studied in the place of fish cage culture in southern coasts of Caspian sea (Mazandaran waters- kelarabad). The goal of this study was to consider of fish cage culture effects on the abundance and biomass of benthic macroinvertebrates. The sampling was carried out in 3 stations in depth of 20 meter of Kelarabad waters monthly. In this study 7 species were identified belonged to 5 genus of 4 family. Totally 23442 sample of benthic invertebrates were counted that the lowest and highest abundance were in station 1(23.4%) and station 2(46.8%) respectively. The results of stations study showed that the highest abundance and biomass were in stations 2 and 3 with the average of 646 ± 1230.4 n/m2 and 0.526 ± 1.001 gr/m2 respectively. This coulld be respectively dependant to not settling of cage (witness station) and appearance of Cerastoderma glaucum because of its large body in station 1. The difference of abundance and biomass between different stations was not significant (p ›0.05). The study on abundance and biomass in different seasons showed that the highest abundance in autumn with the avarage of 888.13 ± 1371.58 n/m2 belonged to Strblospio gynobranchiata and the highest biomass belonged to C. glaucum which was because of appearance of not native species of polychaeta and also the species with shell covering from bivalvia. The results showed that the specie of S. gynobranchiata from polychaeta including 93.3% of abundance was the dominant specie that could be related to appropriate ecological conditions for living and high adaptability.It was concluded that the abundance and biomass of benthic macroinvertebrates in station 1 was lower than other stations which was related to fish cage culture activity and its effects on benthic macroinvertebrates. So it is suggested that each mariculture activity in southern coasts of Caspian sea should be carried out with regarding to environmental considerations and performance of comparative evaluation project of environmental effects.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Marine Cages ; Benthic Macroinvertebrates ; Abundance ; Biomass ; Cerastoderma glaucum ; Strblospio gynobranchiata ; Species
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 38pp.
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  • 58
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    Determination of the inbreeding coefficient in Giant Freshwater prawn ( Macrobrachium rosenbergii) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In order to primery research on population genetic and determination of probale polymorphisme in Giant Freshwater prawn of IRAN samples of muscle texture of this prawn in order to determination of the whole protein separated and transfered to biotechnology laboratory of khuzestan research center(2002-2003) this laboratory by the method of electrophoresis samples(Laemmli -SDS/Polyacrylamide Gel Electrophoresis) went under analysis stage.It is necessery to said that in these expreiments utilized from acrylamid gel by 12% and of the average samples were 10% of population of each center . As electrophoresis comparison shows population this prawn in IRAN is uniform and needs to imposing a similar genetic management through the country. Acording to calculated covariance table and also path way method of determining inbreeding coefficient(88.8%), inbreeding level (in the 10th generation) in which is as strange reason in alleviation of efficiency of this prawn in IRAN and danger sign for this society of prawns and with do attention reproduction of 10 generation research center in iran and adaptation with climatic and ecological circumstances in the country, should said Iranian Giant Freshwater Prawn.We have to call this society as Giant Freshwater prawn and by imposing exhabitate genetic reactional measures at is possible after for controlled generation and evaluation of results and also by calculation and controlling amount of inbreeding in the level of 3% discover the most hybrid of this naturalized species with foreign improved species and by culturing relationship of superior generation prevent from causing inbreeding problems during next year.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Macrobrachium rosenbergii ; Breeding ; Species ; Freshwater ; Prawn ; Giant Freshwater prawn ; Inbreeding
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 35pp.
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  • 59
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    Biological campaign with snails as first intermediate host for Diplostomum by Tench Tinca tinca (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Identification of fresh water snails in area as first intermediate host of Diplostomum and survey of snails feeding by Tench Tinca tinca and its role in biological control of Diplostomiasis via cutting its life cycle was studied. During four steps sampling (May to August 2001), 771 specimens of all kinds of fresh water snails of Sefidroud Fisheries Research Station (place of survey), as sample of fresh water snails in area was identified. Totally 3 Genus and 4 Species based on abundance consisted of Physaacuta (77.04%), Limnaea Limnaea stagnalis (6.87%) & Planorbis planorbis(6.36%) were identified. The most abundance of snails was seen in May with average 57.5% and the least abundance was in August average 37.75% and number of snail was between 45-47 specimens/m2 that was scattered in depths of O to 80cm. Furthermore the most number of snails was seen in depths of O to 30 cm and from deeper than 80 cm there was no snail due to lacking of aerobic condition. During 2001-2002, practical survey of feeding of snail by juvenile and adult Tench (2 & +3 years old) were conducted treatments (fiberglass tanks treatments 1&2 and fish culture pond treatments 3&4) under equal physical and chemical conditions with presence of GFC (Growth Food Carp) in treatments 2&4 and without GFC in treatments 1&3..survey on adult Tench (+250gr) in the first treatment confirmed the snail was fed. In second treatment, 4% of Tench biomass, GFC was distributed and only 30% from it was fed by Tench in the other hand all of snails were fed. The abundance of snails in third treatment was 45 specimens/m2 which after stocking Tench reduced to 8 specimen /m2 or 82% decreased. In the fourth treatment before stocking the Tench, average abundance of the snails was 47 specimens/m2 and based on 4% biomass of Tench 500gr GFC was given which in the end 40% concentrated food was used while abundance of snails decreased to 12 specimens/m2 or 75% decreased. The results of Tench (+15gr) feeding survey in separately in 2002 confirmed the feeding of snails as in first treatment 80% of snails fed by tench and in second treatment 15% of Tench biomass GFC was distributed and 78% of artificial food and 65% of snails consumed too. The abundance of snails in third treatment was 36 specimens fm2 which after stocking Tench reduced to 13 specimens/m2 by the 64% decrease and in forth treatment before stocking the Tench, average of abundance the snails was 41 specimens/m2 and in this treatment similar second treatment based on 15% biomass of Tench, GFC was given daily which at the end 65% GFC was used while abundance of snails decreased to 43% .Juvenile Tench (2 years old) in contract with adult Tench (+3 years old) had no ability to use different sized of snails and only can use of juvenile and small size (5mm) of snails. At the beginning, inclination of Tench to use of snail was further than using of GFC. Statistics test (T-student & Z test) confirmed the results were significant. The results of this survey showed that snail feeding by Tench is instinctive character and this species can control snails (Diplostomum first intermediate host) and increase production in fish pond culture.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Snail ; Diplostomum ; Tinca tinca ; Species ; Specimens
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 84pp.
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  • 60
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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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  • 61
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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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  • 62
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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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  • 63
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    Mudskipper species Diversity of the Khur-e-Abee Protected Area, Hormozgan Province (2018)
    Details
    Publication Date: 2021-05-19
    Description: Mudskipper species diversity in the Khur-e-Abee protected area in the coastal areas of the Persian Gulf in Hormozgan Province was studied monthly. Sampling was done from March 2011 to February 2012 is 56º 24' 58” E, 27º 11' 28” N geographical position. A total of 730 specimens belonging to 3 species and 1 family werecollected by hand. Three species were identified; Boleophthalmus dussumieri, Scartelaos tenuis and Periophthalmus waltoni. The monthly sampling of mudskipper species composition showed that S. tenuis (45.75%), P. waltoni (30.48%) and B. dussumieri (26/02%) were first, second and the third in abundance respectively. Shannon species diversity index (1.09), Simpson index (0.62) and Pielou species index (0.99) were highest in October Whereas the Margalef species richness index (0.62) was the highest in December.
    Description: Published
    Keywords: Biodiversity ; Mudskipper ; Periophthalmus waltoni ; Scartelaos tenuis ; Boleophthalmus dussumieri ; Species ; Diversity ; Area
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-7
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  • 64
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    The study Characterization of morphology and abundance of zoea larval stages of two species of the family Epialtidae (Crustacea: Brachyura) in the coastal waters of Hengam Island (The Persian Gulf) (2018)
    Details
    Publication Date: 2021-05-19
    Description: This research has been done on larval stage of two species of Epialtidae's Family on coastal waters of Hengam Island (The Persian Gulf) in 2011 . Sampling is done by plankton net with 300 μm mesh size by method of diagonal traction from bottom to surface in 6 station for a year from winter 2011 to autumn 2012. This research is done based on morphological characteristics, such as overall shape and appendages of larvae in the lab by contrast phase inverted microscope of the first zoea larval stages of species Menaethuis monoceros and second zoea of Menaethiops nodulosus was studied. Larval species density studied at different stations and seasons were calculated. The highest average density respectively with 22/33 and 72/7 individual per m3 in the summer was calculated.
    Description: Published
    Keywords: Brachyura larvae ; Zoea ; Epialtidae larvae ; Morphology ; Abundance ; Species ; Coastal waters
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.61-70
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  • 65
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    Genetics Diversity of Aphanius ginaonis and Aphanius dispar in Hormozghan and Bushehr Coastal Zones respectively using PCRRFLP Molecular Marker (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this study, two populations of Aphanius ginaonis (Holly, 1929) and Aphanius dispar (Ruppell, 1828) were examined to determine genetic diversity using PCR-RFLP technique. A total of 60 individual specimens were collected from Hormozgan and Bushehr internal waters, comprising two sampling sites; from Geno hot spring (30 individuals of A. ginaonis) and Mir Ahmad hot spring (30 individuals of A. dispar). The D-loop region of mitochondrial DNA (550 bp) was amplified using PCR followed by RFLP analysis based on 5 restriction endonucleas enzymes (AluI, DpnI, Eco47I, HindIII HinfI). In order to undertake data analysis, Arlequin 3.11 was applied. Results at population levels indicated that Geno individuals have more haplotype diversity than Mir Ahmad individuals (9 and 3 haplotypes respectively). However, further investigation using genetic techniques is required to clarify the molecular history and evolution of Aphanius species in this area. Results obtained from this research would be applicable to understand conservation genetics and management of this important fish species in Iran.
    Description: Published
    Keywords: Genetic ; Diversity ; Aphanius ginaonis ; Aphanius dispar ; PCR-RFLP ; Molecular ; Species ; Coastal Zone
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-9
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  • 66
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    Analysis of saline activator solution effects on sperm quality indices of Barbus sharpeyi by image J software (2018)
    Details
    Publication Date: 2021-05-19
    Description: Regarding low fertilization rate of Barbus sharpeyi, one of the main Barbus species in south of Iran, saline activator solutions (SAS 1 and 2) were used for increasing of sperm activation and its sperm quality indices were assessed by using Image J software as a fish sperm adapted tools. SAS 1 (45mM NaCl, 5mM KCl, 30mM Tris, 188±2.3 mosmol/kg) and SAS 2 (50mM NaCl, 30mM KCl, 30mM Tris, 189±1.7 mosmol.kg) were added to a mixture of 12 male semen comparing with distilled and tap water and their effects on VCL, VSL, ALH, Linearity, %motility, spermatozoa path, % A, B and C spermatozoa type, fertilization, hatching and deformity rate were analyzed in triplicate. Results showed that SAS2 had the highest VCL (21.37±0.36 µm/s-1), VSL (11.6±0.3 µm/s-1) and motility percentage (85.75±1.56 %) among treatments. The highest A type spermatozoa percentage was recorded for SAS1 (47.16±3.15 %) and SAS2 (43.89±4.54%). The lowest C type spermatozoa percentage was recorded using SAS2 (14.24±1.56 %). Also, the highest fertilization rate was achieved from SAS2 (79.5±0.37%) and SAS1 (77.74±4%) respectively. Furthermore the lowest larval deformity rate (13.77±1.03%) was shown due to the use of SAS2. Final conclusion confirmed that SAS1 and SAS2 have positive and significant effects (P 〈 0.05) on extending the time length of sperms movement, VCL and VSL of B. sharpeyi which consequently resulted in better efficiency of propagation of this species in south of Iran.
    Description: Published
    Keywords: Aquaculture ; Software ; Sperm ; Saline activator solution ; Fertilization ; Barbus sharpeyi ; Quality ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.357-377
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  • 67
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    Determination of developmental stages of embryo in the Sea Urchin, Echinometra mathaei (2018)
    Details
    Publication Date: 2021-05-19
    Description: Sea Urchin is one of the most useful tools in developmental biology studies because this organism has the simplest kind of developmental stages. We aimed to determine developmental stages and timetable of Echinometra mathaei embryo (the species of Persian Gulf). The spawning of E. mathaei was induced by 0.5M KCl injection (1ml) into the coelomic cavity. After fertilization, embryos were placed in beakers and were incubated at 29◦C and a salinity of 39 ppt until embryos reached the pluteus stage. The developmental stages of embryos and the timing of each stage including cleavage, morulae, blastula, gastrula, prism and pluteus larvae were studied under the microscope. Our results showed that after 30 hours from fertilization time, the embryos developed to pluteus larvae. E. mathaei had the shorter development time in comparison to the other Sea Urchin species. Therefore, it may be appropriate as a model organism in biological researches.
    Description: Published
    Keywords: Determination ; Sea Urchin ; Echinometra mathaei ; Biological Model ; Development ; Timetable ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.294-304
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  • 68
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    Protein and lipid changes of FPC produced from Caspian Sea Kilkas in VP and MAP during storage at different temperatures (2018)
    Details
    Publication Date: 2021-05-19
    Description: Fish Protein Concentrate (FPC) is a healthy, sustainable and high nutritive product that produced from fish and protein and other nutrients are more concentrated than in the fresh fish. The aim of this research is to study the sustainability of FPC produced from Kilka (combination of three Caspian Sea Kilka species, Clupeonella engrauliformis, C. grimmi and C. cultriventris which were not identified and processed separately) in VP (Vacuum Packaging) and MAP (Modified Atmosphere Packaging) at different temperatures during six months of storage. According to result of chemical analysis performed, protein content was evaluated 91.2%, lipid 0.5%, ash 3.6%, moisture 2.3%, TVN 10 mg/100g and peroxide 5 meq/kg in the produced FPC before packing. Amino acids and fatty acids were also determined. Lipid amount in FPC after 6 months at 35°C in VP changed from 0.50 to 0.45 and in MAP (combined of 60% CO2, 30% N2 and 10% O2), decreased from 0.50 to 0.36. It was also detected that increase in temperature leads to more decrease in lipid content but it was not significant (P〉0.05). Protein content of FPC has changed from 91.2% to 73.6% during six months at 35°C in VP and 69.4% in MAP. But at 5°C, protein contents were changed from 91.2% to 88.4% and 81.2% in VP and MAP, respectively these changes were significant (P〈0.05) but the decrease in MAP was again more than VP.
    Description: Published
    Keywords: Fish Protein Concentrate ; Kilka ; Vacuum Packaging ; Modified Atmosphere Packaging ; Temperature ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.338-346
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  • 69
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    Species identification reveals mislabeling of important fish products in Iran by DNA barcoding (2018)
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    Publication Date: 2021-05-19
    Description: This study reports on the molecular identification of fish species from processed products which had a priori been classified as belonging to 5 important species in Iran for human consumption. DNA barcoding using direct sequencing of an approximately 650bp of mitochondrial Cytochrome oxidase subunit I (COI) gene revealed incorrect labeling of Narrow-barred Spanish mackerel samples. High occurrence of fraudulent fishery products, if left unchecked, can pose a negative impact on the economy. This investigation adds further concern on the trading of processed fish products in Iran from both health and conservation points of view.
    Description: Published
    Keywords: Genetics ; Food traceability ; Forensic genetics ; DNA barcoding ; Fish product ; Species ; Identification
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.783-791
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  • 70
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    Screening and evaluation of indigenous bacteria from the Persian Gulf as a probiotic and biocontrol agent against Vibrio harveyi in Litopenaeus vannamei post larvae (2018)
    Details
    Publication Date: 2021-05-19
    Description: Isolation of autochthonous bacteria from marine sources as a potential probiont in biocontroling against pathogenic Vibrio species in the shrimp culture industry was the aim of current research. A total of 198 bacterial strains were isolated from pond water, sediment, hepatopancreas and gut samples of shrimps after culturing the samples on Tryptic Soy Agar and incubated at 30 °C for 24-48 h. The isolates were tested for their antagonistic activity in contact with Vibrio harveyi. Two strains (IS02 and IS03) that isolated from the gut and pond sediment were showed antagonistic against V. harveyi. According to 16S ribosomal DNA gene sequence analysis, the strain IS02 was identified as Bacillus subtilis and IS03 as B.vallismortis. Further, the two bacterial species, B. subtilis and B. vallismortis were challenged separately for probiotic activity in the post larvae of Litopenaeusvannamei against pathogenic V. harveyi. The present study identified B.subtilis IS02 and B.vallismortis IS03 had biocontrol activity against V. harveyiin vitro and in vivo and they increase growth performance of L.vannamei in post larvae stage.
    Description: Published
    Keywords: Fish disease ; Probiotic ; Probiotic ; Litopenaeusvannamei ; Indiginous bacteria ; Vibrio harveyi ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.873-886
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  • 71
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    Molecular diversity of Symbiodinium spp. within six coral species in Larak Island, the Persian Gulf (2018)
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    Publication Date: 2021-05-19
    Description: Reef-building coral harbor communities of photosynthetic taxa of the genus Symbiodinium (zooxanthellae). The genus Symbiodinium is currently classified into nine genetic clades (A–I). Various corals harbor different Symbiodinium clades; some show specificity to a single strain. Coral and their zooxanthellae are sensitive to environmental stresses. In the Persian Gulf, coral reefs are subject to harsh environmental conditions including extreme temperatures and high salinity. This is the first study to use clade specific primers to clarify the diversity of Symbiodinium in each coral species of Larak Island. For this purpose six coral species were collected at two different locations in Larak Island. After DNA extraction, PCR amplification was performed using clade specific primers. The results showed that multiple Symbiodinium clades are hosted by most coral species. In addition, among thirteen obtained Symbiodinium sequences, the frequency of either tree clades, A, C and D was almost the same. Corals species may contain different clades of Symbiodinium depending on the region and on the tolerance characteristics of each clade. Thus, knowledge of zooxanthellae diversity associated with scleractinian can contribute to a better understanding of the sensitivity of corals to environmental conditions.
    Description: Published
    Keywords: Symbiodinium ; Clade A ; Clade C ; Clade D ; Molecular ; Diversity ; Species ; Coral
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.151-161
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  • 72
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    Isolation and characterization of microsatellite loci in the Persian sturgeon (Acipenser persicus, Borodine, 1897) and cross-species amplification in four commercial sturgeons from the Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: In order to have a sustainable management on Persian sturgeon as a highly commercial species in the South Caspian Sea, we need to identify its population structure and the level as well as its conservation status in their natural habitat. To develop a conservation program for this all Caspian Sea' sturgeon species it requires knowledge of its genetic diversity using reliable molecular marker to study population genetic structure. For these purposes, an enriched library was prepared based on a modified biotin-capture method. Approximately 1800 positive clones were screened for microsatellites in an Acipenser persicus genomic library. Of these 350 positively hybridizing clones were sequenced, and 81 clones were identified as having microsatellites with adequate flanking regions. We developed and tested 68 microsatellite primer pairs for Persian sturgeon. Out of 68 primer pairs developed, 11 pairs resulted in poor or no amplification, 13 were ambiguous, 6 were monomorphic, 20 were tetrasomic and 18 were octosomic in Persian sturgeon. While none of the markers showed disomic inheritance in Persian sturgeon and Russian sturgeon (A. gueldenstaedtii). Several of the markers appeared useful for studies stellate sturgeon (A. stellatus), ship sturgeon (A.nudiventris) and beluga (Huso huso). Nearly all the polymorphic pattern for ship, stellate and beluga displayed the simple banding patterns characteristic of disomic loci, while those for Russian sturgeon displayed banding patterns characteristic of tetraploid or higher polyploid levels. These markers may prove useful in a variety of future sturgeon population genetic studies in the Caspian Sea.
    Description: Published
    Keywords: Russian sturgeon ; A. gueldenstaedtii ; Persian sturgeon ; Acipenser persicus ; Caspian Sea ; Microsatellite ; Population genetic ; Genetics ; Population ; Structure ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.548-558
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  • 73
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    Evolutionary study on two closed Gammarus (Crustacea, Amphipoda) species from Zagros Mountains (IRAN) using molecular methods (2018)
    Details
    Publication Date: 2021-05-19
    Description: Mitochondrial Cytochrome Oxidase Subunit I DNA sequences are a good discriminative marker for phylogenetic studies in crustaceans and especially in amphipoda. In the present study, molecular and morphological data were analyzed to test whether Gammarus lobifer authority and Gammarus balutchi authority which one or two geographically separated but morphologically similar species. The analyses proved that there are two species and that uplift of the Zagros Mountains was probably the most important cause of Allopatric speciation in this region during the Miocene period.
    Description: Published
    Keywords: Fish disease ; Methods ; Molecular phylogeny ; COI ; Gammarus lobifer ; Gammarus balutchi ; Evolutionary ; Species ; Molecular
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.256-266
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  • 74
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    Protein profiling for phylogenetic relationship in snakehead species (2018)
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    Publication Date: 2021-05-19
    Description: Protein banding pattern of eight snakeheads – Channa species viz., Channa striatus, Channa marulius, Channa punctatus, Channa diplogramme, Channa bleheri, Channa gachua, Channa stewartii and Channa aurantimaculata collected from different regions of India were used to study the phylogenetic relationship among them. The banding pattern from muscle protein indicated a unique profile for each species and the electrophoregrams showed similarities among the species studied. In the SDS-PAGE, a maximum of 12 protein bands were obtained for C. gachua followed by 11 for C. diplogramme and 10 for C. marulius whereas less number of bands were recorded for the remaining species. Molecular weight of the protein bands varied from 16 kDa - 232 kDa. UPGMA (Unweighted Pair Group Method with Arithmetic Mean) dendrogram revealed that the phylogenetic relationship was very close among C. aurantimaculata and C. bleheri and also between C. gachua and C. stewarti.
    Description: Published
    Keywords: Channa striatus ; Channa marulius ; Channa punctatus ; Channa diplogramme ; Channa bleheri ; Channa gachua ; Channa stewartii ; Channa aurantimaculata ; Snakehead ; Phylogenetic relation ; SDS- PAGE ; Protein banding ; Protein ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1178-1186
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  • 75
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    Length-weight relationship and condition factor of seven fish species from Shahrbijar River, Southern Caspian Sea basin, Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: Length-weight relationship and condition factor were estimated in seven fish species, including Barbus cyri, Capoeta gracilis, Alburnoides eichwaldii, Pseudorasbora parva, Ponticola cyrius, Cobitis keyvani and Acanthalburnus microlepis from Shahrbijar River, Guilan Province, Iran. A total of 416 specimens ranging from 18 to 135 mm in total length and from 0.06 to 19.25 g in total weight were collected. Based on the results, growth coefficient values “b” ranged from 2.615 (in B. cyri) through 3.001 (in A. microlepis). All length-weight relationships were significant (p〈0.05), with r2 higher than 0.819. The five species viz. C. gracilis, P. parva, C.keyvani, P. cyrius, and B. cyri showed allometric (b〈3〈b) while two species viz. A. microlepis and A. eichwaldii showed isometric (b=3) growth patterns. Condition factor ranged from 0.57 (in C.keyvani) through 1.11 (in P.cyrius). All linear regressions were highly significant (p〈0.05). The present study provides the first baseline information on the length - weight relationships of the seven fish species from Shahrbijar River which may be useful for further fisheries management of these species.
    Description: Published
    Keywords: Barbus cyri ; Capoeta gracilis ; Alburnoides eichwaldii ; Pseudorasbora parva ; Ponticola cyrius ; Cobitis keyvani ; Acanthalburnus microlepis ; Freshwater fishes ; Morphometrics ; Allometry ; Length-weight relationship ; Condition factor ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.733-741
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  • 76
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    A comparative study on reproduction of kilka species (Clupeidae) in southeastern parts of the Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: The aim of the present study was to investigate the reproduction of three species of kilka, including common, anchovy and bigeye kilka in the southeastern waters of Caspian Sea. This study was conducted during 2010 and 6476 specimens were fortnightly collected from fishing landing site. Body weight and fork length were measured. The samples were dissected and female gonads were weighed. Sexual maturity classification was carried out based on six stages in ovarian development. Age was determined using sagitta otoliths. Results were compared with the previous years. Male: Female ratio in common, anchovy and bigeye kilka were 1: 0.779, 0.569: 1 and 0.656: 1, respectively. Study of sexual maturity stages and GSI showed that common kilka spawning began in March and ended in July with the peak in May. Spawning period of anchovy kilka was more extensive than common kilka and take place from April to November with a peak in November. Bigeye kilka spawned during the year entirely. Its spawning occurred intensively during the autumn with a peak in October. Our results showed that M: F ratio differs during the year which is related to their reproduction. The reproduction scheduling of kilka species comparing with the previous years had some changes but has not significantly been affected by the Caspian Sea pelagic changes.
    Description: Published
    Keywords: Biology ; Physiology ; Kilka ; Clupeidae ; Clupeonella cultriventris caspia ; C. engrauliformis ; C. grimmi ; GSI ; Maturity stages ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.522-532
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  • 77
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    Review Papers:Species diversity and distribution pattern of marine mammals of the Persian Gulf and Gulf of Oman - Iranian Waters (2018)
    Details
    Publication Date: 2021-05-19
    Description: A total of 98 marine mammal records from Iranian coastal waters of the Persian Gulf and Gulf of Oman were compiled of which 66 are previously unpublished new records. Seventy-nine were from the Persian Gulf and 16 from the Gulf of Oman coast. The largest numbers of records were from Qeshm Island and Bushehr Provinces. Records of finless porpoise (Neophocaena phocaenoides), Indo-pacific humpback dolphin (Sousa chinensis) and Indo-pacific bottlenose dolphin (Tursiops aduncus) were by far the most numerous probably reflecting their inshore distribution and local abundance. Other species recorded are common dolphin (Delphinus capensis tropicalis), rough-toothed dolphin (Steno bredanensis), Risso’s dolphin (Grampus griseus), false killer whale (Pseudorca crassidens), and dugong (Dugong dugon). Evidence of 22 Mysticetes were obtained eight of which were tentatively identified as Bryde’s whales (Balaenoptera edeni), three as fin whales (Balaenoptera physalus) and three as Humpback whales (Megaptera novaeangliae). The largest threat to marine mammals in Iran is likely to be incidental capture in fishing gear. Six by caught finless porpoises were recorded and this species may be particularly vulnerable to incidental mortality in gillnets. Recommended marine mammal research, conservation and management small projects in Iran are described.
    Description: Published
    Keywords: Ecology ; Neophocaena phocaenoides ; Sousa chinensis ; Tursiops aduncus ; Delphinus capensis tropicalis ; Steno bredanensis ; Grampus griseus ; Pseudorca crassidens ; Balaenoptera edeni ; Balaenoptera physalus ; Megaptera novaeangliae ; Marine mammals ; Species diversity ; Distribution patterns ; Species ; Marine
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.927-944
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  • 78
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    Relationships between the physicochemical parameters and zooplankton in Eğirdir Lake (Turkey) (2018)
    Details
    Publication Date: 2021-05-19
    Description: The zooplankton community structure in Eğirdir Lake (Isparta-Turkey) was studied monthly throughout an annual cycle (January 2010-December 2010). The zooplankton community was represented by three main groups: Rotifera, Cladocera and Copepoda, respectively comprised 89.62%, 7.78% and 2.60% of the total zooplankton abundance. Eğirdir Lake was dominated by the rotifera Polyarthra dolichoptera in September and October, that succeeded by cladocera Bosmina longirostris species during December. Canonical correspondance analysis (CCA) was used to relate species distribution to environmental factors. The variation in the species data was significantly (p〈 0.05) related to a set of environmental variables (conductivity, carbonate, pH, ammonium, organic substances, dissolved oxygen, saturation of dissolved oxygen, chloride and temperature). According to the CCA result, variables were able to explain 81.9% of the total variation suggesting a significant result. The rotifer, Asplanchna priodonta, and the crustaceans, B. longirostris and Nauplius larvae seemed to be affected by environmental gradients.
    Description: Published
    Keywords: Ecology ; Bosmina longirostris ; Asplanchna priodonta ; Physicochemical parameters ; Zooplankton ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.118-132
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  • 79
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    The impact assessment of cage aquaculture on benthic communities along the south eastern Black Sea (2018)
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    Publication Date: 2021-05-19
    Description: The present study was conducted to examine the impact of cage aquaculture on benthic communities in coastal areas (depth 25 to 50 m) from fish farming operations located along the southeastern Black Sea (Ordu-Perşembe, Trabzon-Yomra and Rize central). Sampling was conducted seasonally from April 2007 to 2009. Sediment samples were taken using Ekman Grab (box core- 0.04 m2). Temperature, salinity, and water velocity were periodically measured to determine influencing sedimentary organic matter in the sediment, oxygenation, and anoxic conditions. In addition, grain size of sediment, organic carbon content, and distribution of benthic communities were investigated. In order to determine benthic impact of fish farms on the region, Shannon – Wiener diversity index (H’), AMBI (AZTI Marine Biotic Index) and M-AMBI (Multivariate- Marine Biotic Index) indices were used. Results of current study showed that benthic zone ecological quality of stations with number 01, 02, 03, and 04 at Ordu-Perşembefish-farming habitat was found to be very low. In autumn 2008, there were 3 species which belonged to Capitella capitata (844 individuals/m2), Capitella sp. (133 individuals/m2), and Heteromastus filliformis (311 individuals/m2) at OP-01 station. In addition, the impact of Trabzon-Yomra fish-farming activity on benthic communities was low. The degree of exposure for Rize fish-farming area in all seasons was quite low, which was not a significant negative impact.
    Description: Published
    Keywords: Biology ; Physiology ; Heteromastus filliformis ; Capitella capitata ; Cage culture ; Benthic organisms ; Ecological quality ; Marine biotis indices ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.719-738
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  • 80
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    Multi-species approach for stock management of kilka fish (genus: Clupeonella) in Iranian waters of the Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: There have been recent changes in the Caspian Sea ecosystem, such as those due to changes in sea level or those caused by the invasive ctenophore, Mnemiopsis leidyi. It is believed that these changes had significant impacts on the absolute and relative abundance of the commercially important anchovy kilka (Clupeonella engrauliformis) and common kilka (C. cultriventris caspia) leading to decline in the former and increase in the latter species in the Iranian waters. Consequently, more rigorous management is required. The mixed-species yield-per-recruit was applied to the Iranian conical lift-net. This study showed that the pooled fishing mortality at F40% was 0.70 yr-1 which is higher than fishing mortality of main species of anchovy kilka, but lower than the pooled fishing mortality at F0.1 (0.75 yr-1). The ABC under the best information available, at pooled species reference points for two species of anchovy and common kilkas, was estimated to be 8260mt. An analogous goal in a multispecies situation would be fishing at a fishing level, denoted Fws, such that the fishing rate for the weakest stock (in this case; anchovy kilka) does not exceed its F40% rate. Under this harvest strategy at F40% for anchovy kilka, it is suggested that the ABC of pooled species of anchovy and common kilkas was estimated 7920mt to be selected in kilka fishery in Iranian waters.
    Description: Published
    Keywords: Clupeonella engrauliformis ; Common kilka ; Multi-species fishery ; Yield per recruit ; Spawning biomass per recruit ; Reference point ; Acceptable biological catch ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.141-154
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  • 81
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    Mycobiota and aflatoxin B1 contamination of rainbow trout (Oncorhinchus mykiss) feed with emphasis to Aspergillus section Flavi (2018)
    Details
    Publication Date: 2021-05-19
    Description: In the present study, mycobiota and natural occurrence of aflatoxin B1 (AFB1) in pellet feed and feed ingredients used in a feed manufacturing plant for rainbow trout nutrition was investigated. The samples were cultured on the standard isolation media for 2 weeks at 28 ºC. Identification of fungal isolates was implemented based on the macro- and microscopic morphological criteria. AFB1 was detected using high performance liquid chromatography (HPLC). Based on the results obtained, a total of 109 fungal isolates were identified of which Aspergillus was the prominent genus (57.0%), followed by Penicillium (12.84%), Absidia (11.01%) and Pseudallscheria (10.10%). The most frequent Aspergillus species was A. flavus (60.66%) isolated from all feed ingredients as well as pellet feed. Among 37 A. flavus isolates, 19 (51.35%) were able to produce AFB1 on YES broth in the range of 10.2 to 612.8 µg/g fungal dry weight. HPLC analysis of trout feed showed that pellet feed and all feed ingredients tested except gluten were contaminated with different levels of AFB1 in the range of 1.83 to 67.35 µg/kg. Unacceptable levels of AFB1 were reported for feed including soybean, fish meal and wheat. These results indicate the importance of AF contamination of trout feed in amounts higher than the acceptable level as a risk factor for fish farming production.
    Description: Published
    Keywords: Aspergillus ; Penicillium ; Pseudallscheria ; Aflatoxin ; Oncorhinchus mykiss ; Aspergillus flavus ; Mycobiota ; Troutfeed ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.363-374
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  • 82
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    Study on the parasites of Pseudorhombus elevatus, Psettodes erumei and Brachirus orientalis from the Persian Gulf, Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: The Persian Gulf is of great economical, environmental and political importance, and includes around 205 species of fishes that only some of them have been studied parasitologically. From the order Pleuronectiformes ( ray-finned fishes), Psettodes erumei (Psettodidae), Pseudorhombus elevatus (Bothidae) and Brachirus orientalis (Soleidae) were selected for the survey. One hundred and forty eight fishes including 97 P. erumei, 43 P. elevatus and 8 B. orientalis were provided from two different regions of Iranian waters of the Persian Gulf and Oman Sea. From P. erumei, 4 species of nematodes, one cestode and one acanthocephal species are reported including: Philometra sp., Contracaecum sp., Pseudoterranova sp., Raphidascaris sp., Dasyrhynchus sp. (Trypanorhyncha) larvae and Serrasentis sagittifer. This is the first report of S. sagittifer in P. erumei from the Persian Gulf. P. elevatus had fewer species of parasites including one nematode, Contracaecum, one copepod, Heterochondria pillai and one digenea metacercaria Stephanostomum sp. Brachirus orientalis harbored one copepod and two digenea species, Allocreadium sp. and Lepocreadioides zebrini. Our research provides evidences that Indian spiny turbots have larger diversity of parasites than the deep flounders.
    Description: Published
    Keywords: Fish disease ; Pseudorhombus elevatus ; Psettodes erumei ; Brachirus orientalis ; Serrasentis sagittifer ; Pleuronectiformes ; Fish ; Parasites ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.827-835
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  • 83
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    Ecological classification of southern intertidal zones of Qeshm Island, based on CMECS model (2018)
    Details
    Publication Date: 2021-05-19
    Description: The “Coastal and Marine Ecological Classification Standard (CMECS)”, a new approach to ecological classification, was applied to 122 km of the southern intertidal zone of Qeshm Island located the Hormouz Strait - the Persian Gulf. Two components of this model, Surface Geology (SGC) and Biotic Cover (BCC) were used. Considering the extent and geomorphological alternations of the covered area, 12 sampling sites within 5 sub-regions were designated using by GPS. In total, 60 habitats (biotopes) with 47 codes were determined this variety of biotopes is directly related to the diverse surface geology (substrate) of the covered area. Most of the biotopes and codes were recorded in the mid-eastern coastal zone, due to heterogeneity in substrate structure associated with numerous ecological niches in rocky shores. Crustacean species such as Eriphia smithi, Thalamita prymna, Molluscan species such as Clypeomorous bifisciatus, Cerithium caeruleum and echinoderm species such as Echinometra mathaei and Ophiactis sp. were characteristic of rocky shores, while Crustacea groups including Ocypode rotundata and Dotilla sp., and Umbonium vestiarium (Mollusca) were characteristic of sandy shores. Although the highest number of codes was recorded in Zeitun Park site (Eastern coast), it did not possess the expected specific species (such as Diadema setosum, Linckia multiflora and Ophiocoma scolopendrina), that were encountered in sites with similar surface geology. This could have been caused by tourist traffic at the Zeitun Park site.
    Description: Published
    Keywords: Ecology ; Classification ; Clypeomorous bifisciatus ; Cerithium caeruleum ; Echinometra mathaei ; Ophiactis sp. ; Ocypode rotundata ; Umbonium vestiarium ; Diadema setosum ; Linckia multiflora ; Ophiocoma scolopendrina ; Surface Geology ; Biotic Cover ; Biotope ; CMECS model ; Coastal Zone ; Ecological ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-19
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  • 84
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    A preliminary study on phylogenetic relationship between five sturgeon species in the Iranian Coastline of the Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: The phylogenetic relationship of five sturgeon species in the South Caspian Sea was investigated using mtDNA molecule. Sequence analysis of mtDNA D-loop region of five sturgeon species [Great sturgeon (Huso huso), Russian sturgeon (Acipenser gueldenstaedtii), Persian sturgeon (Acipenser persicus), Ship sturgeon (Acipenser nudiventris), Stellate sturgeon (Acipenser stellatus)] and DNA sequencing of two Escherichia coli cloned DNA fragments sized 758 bp and 922 bp was carried out. Sequence comparison of the mtDNA D-loop region between the five sturgeon species showed 100 % sequence identity. However comparison between a short (758 bp) and long (922bp) mtDNA D-loop region within Russian sturgeon showed a 5 bp differences. On the contrary a partial sequence of the mtDNA ND5 gene region showed high sequence and organic base variability in the five species. These results indicate that direct sequencing of ND5 gene provide more information for phylogenetic or population level studies in sturgeon species. The present study revealed a distinct classification among the five sturgeon species. On the basis of the phylogeny tree it is clear that a close evolutionary relationship exists between the great sturgeon and ship sturgeon that was verified in five phylogenetic trees. On the other hand a close resemblance was also seen between Persian and Russian sturgeon indicates that these two species have a closer evolutionary relationship. This study also showed a 2.2 % sequence divergence in sequence data for ND5 gene between Persian sturgeon and Russian sturgeon which indicated that these two species diverged from each other approximately one million years ago. However the verification of this calls for DNA sequencing of different genes.
    Description: Published
    Keywords: Acipenser nudiventris ; Acipenser stellatus ; Acipenser persicus ; Acipenser gueldenstaedtii ; Huso huso ; Sturgeon ; Phylogenetic ; PCR ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-12
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  • 85
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    A phylogeny analysis on six mullet species (Teleosti: Mugillidae) using PCR-sequencing method (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this study, genetic differences and phylogenic relationships among six Mugilidae species (Mugil cephalus, M. capito, Liza subviridis, L. saliens, L. aurata, Valamugil buchanani) were determined using PCR-sequencing. M. cephalus, L. subviridis, and V. buchanani from the Persian Gulf and Oman Sea, and L. aurata and L. saliens from the Caspian Sea were col-lected. Samples of an imported, Egyptian species M. capito were obtained from the Gomishan Research Center in Gorgan. Total DNA from the samples were extracted according to phenol-chloroform procedure. The extracted total DNAs were amplified using polymerase chain reaction (PCR) and then sequenced. The number of bases in the mitochondrial 16s rRNA genome used in this study approximated 600 base pairs. The size of the bands was identical in all the studied species and no heteroplasmia was observed. In addition, the numbers of variable, preserved, and Pi sites were about 114/624, 488/624, and 110/624, respectively. Analysis of the sequences showed great differences between Mugil species and the other studied species. The phylogenetic tree obtained through Neighbor-Joining method revealed that L. saliens and L. aurata were in the same branch while L. subviridis was in a separate branch. In contrast, Maximum Parsimony tree located L. subviridis and L. aurata in a single branch and assigned L. saliens to a distinct branch. This result brings in the question of monophyletic origin of the genus Liza.
    Description: Published
    Keywords: Aquaculture ; Valamugil buchanani ; Mugil cephalus ; Sequencing ; Mugillidae ; Phylogeny ; PCR ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.669-679
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  • 86
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    The Migration of Rutilus frissi kutum, Vimba vimba persa and Calcalburnus chalcoides to the Sefidrud River (2018)
    Details
    Publication Date: 2021-05-19
    Description: The Sefidrud river has always been the natural spawning site for many anadromous fish species, including sturgeon, kutum, Vimba vimba pers a and Calcalburnus chalcoides. Many factors such as marine constructions, removing sand and fine sand and pollution have reduced the productivity of the river, which have caused a decline in the migration of the. fishes to the river. Our study revealed that, despite the environmental pressure on the river, some fishes still migrate to the Sefidrud river. Besides sturgeon, bony fishes, which are highly valued at the market also migrate to the Sefidrud river. The spawning of kutum in the Sefidrud river peaked in the second half of March, when water temperature reached 11°C. By a regulatory management of the catch, this river is able to conserve the biological productivity of the southern Caspian Sea.
    Description: Published
    Keywords: Rutilus frisii kutum ; Vimba vimba persa ; Chalcalburnus chalcoides ; Spawning ; Fish ; Species ; Sturgeon
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.75-86
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  • 87
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    Abundance, spawning season and type of Gattan (Barbus xanthopterus Heckel, 1843) in south of Karkheh River and Hour-Al-Azim marsh (Khuzestan Province) (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this study 401 specimens of Gattan (Barbus xanthopterus) caught by drifting and set gillnets, cast nets and forks were studied. Samples were collected monthly (October 1996 to September 1997) from Hamidieh Dam to Hour-Al-Azim Lagoon. Morphometric and meristic parameters and biological characteristics were studied in the laboratory. The Highest frequency of Gattan in the river was in March and in Hour-Al-Azim was in December. The length range of the fish in the river was broader than in the hour, and fishes with lengths more than 700mm were only observed in the river. Sharp decrease in GSI in May and occurence of spawning in May and June showed that reproduction of this species occurs in spring (in a two month period) and is relatively short. Minimum and maximum ova diameter were 0.01mm and 2.25mmin stages II and IV of gonad maturity respectively. An increasing trend in ova diameter up to April and decreasing in June showed one time spawning of this species. Surface water temperature in the spawning season was between 25.5oC and 28.65oC and turbidity was in its lowest level in this period. Sex maturation in males occurred in length of 151-200mm (one year old), and in females in 501-550mm (3 years old). Average sex ratio (male to female) was 1:1.31 which is not significantly different from 1:1 (95% confidence limit).
    Description: Published
    Keywords: Morphometric ; Biological ; Laboratory ; Spawning ; Gattan ; Barbus xanthopterus ; Specimens ; Gillnet ; GSI ; Species ; Maturity ; Sex ratio ; Parameters ; Gonad ; Abundance
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-26
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  • 88
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    Survey on Myxosporean Parasites in the Mazandaran and Guilan Provinces (Southern Part of Caspian Sea) (2018)
    Details
    Publication Date: 2021-05-19
    Description: A parasitological survey was carried out during 1994-1996 in Mazandaran and Guilan Provinces (Caspian Sea). 159 samples from 17 different species were examined. Samples were collected from Tajan River, Anzali Lagoon and some fish farms. Immediately after caught live fish were transported to laboratory and kept in aquarium for further examination. During this study ten species of Myxosporean parasites were separated, identified and classified. This is the first report on infestation of inland fishes of Iran by these ten parasite species. Morphology of spores, development stages of plasmodia, tissue specifications and cyst production of these parasite species were investigated in the present study. Four of the Myxosporeans were identified as potential pathological hazards for three fish species. These are Myxobolus pavlovski for Silver Carp (Hypophthalmichthys molitrix) and Big Head (Hypophthalmichthys nobilis), M. bramae for Kutum (Rutilus frisii kutum). M.muelleri and M. ellipsoides for Cyprinids. The other six identified Myxoporid species are: Myxobolus pseudodispar, M. minutus, M. musculi, M. musayevi, M. samgoricus and Myxidium pfeifferi.
    Description: Published
    Keywords: Parasitological ; Morphology ; Pathological ; Survey ; Myxosporean ; Parasites ; Samples ; Species ; Plasmodia ; Tissue ; Fish ; Myxobolus pavlovski ; Silver Carp ; Hypophthalmichthys molitrix ; Big Head ; Hypophthalmichthys nobilis ; M . bramae ; Rutilus frisii kutum ; M.muelleri ; M. ellipsoides ; Cyprinids ; Myxoporid ; Myxobolus pseudodispar ; M. minutus ; M. musculi ; M. musayevi ; M. samgoricus ; Myxidium pfeifferi
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.57-74
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  • 89
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    Fatty acid profiles in some of most common fish species from the southern coasts of Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: Changes in diet during the recent years have caused a marked increase in consumption of saturated fatty acids and n-6 polyunsaturated fatty acids (PUFAs) with a concomitant decrease in the intake of n-3 PUFAs. Increased fish consumption has been shown to be one of the best way to increase dietary intake of long-chain n-3 PUFAs such as eicosapentaenoic acid and docosahexaenoic acid and more balanced n-6: n-3 ratios. Our objective in this research was to characterize fatty acid profile of 7 commonly consumed fish species with different prices, from Persian Gulf. Fishes were collected from local market of Bandar abbas. Fatty acid composition of samples was determined using gas chromatography. This analysis revealed that Pomadasys kakkam and Pseudorhombus elevates contained highest concentrations of n-3 PUFA, low saturated fatty acids (42.41%, 35%) and Pampus argennteus, as one of the most expensive among southern marine fishes contained lowest concentrations of n-3 PUFA, higher saturated fatty acids (6.72% , 42%).
    Description: Published
    Keywords: Fatty acids ; Long chain ; Omega 3 ; Omega 6 ; Most common marine ; Species ; Pomadasys kakkam ; Pseudorhombus elevates ; Pampus argennteus ; Fish
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.13-22
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  • 90
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    Karyotyping and number of chromosomes of Silver Carp (Hypophthalmichthys molitrix) (2018)
    Details
    Publication Date: 2021-05-19
    Description: Karyotype and number of chromosomes of silver carp (Hypophthalmichthys molitrix) were determined by using tissue-squashing method and gimsa staining. In this experiment 80 larvae and 10 fingerlings (weighting 1-8 g) were examined and totally 30 chromosomal slides were prepared. The obtain results indicated that the number of chromosomes in this species was found 2n=48 (with 88 chromosomal arms). Consist of 6 pairs metacentric (M), 14 pairs submetacentric (SM) and 4 pairs of Acrocentric (A). The karyotype formula can be stated as: (6M + 14SM + 4A).
    Description: Published
    Keywords: Karyotyping ; Chromosome ; Silver Carp ; Hypophthalmichthys molitrix ; Tissue-squashing method ; larvae ; Fingerlings ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.107-115
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  • 91
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    The comparison of LC50 of clove essence and MS222 in Acipenser persicus, Oncorhynchus mykiss and Cyprinus carpio (2018)
    Details
    Publication Date: 2021-05-19
    Description: The LC50 of two anaesthetic agents, clove essence and MS222, on the cultivated fish species, Acipenser persicus, Oncorhynchus mykiss, Cyprinus curpio were estimated. 640 samples of above mentioned species were used exposing anaesthetic agents for 2 minutes. LC50 of clove essence and MS222 for sturgeon estimated 297 and 291 ppm, for common carp was 271 and 272 ppm; and for rainbow trout Was 199 and 207 pmm, respectively. Significant difference was found only between LC50 of MS222 in rainbow trout with LC50 of both agents in two other species. Also, the results showed that there is no significant difference on poisoning of two applied drugs in all above mentioned species; with comparing different species, rainbow trout had lower tolerance to both anesthetics.
    Description: Published
    Keywords: Acipenser persicus ; Oncorhynchus mykiss ; Cyprinus carpio ; Fish ; Species ; Sturgeon ; Common carp ; Rainbow trout ; MS222 ; LC50
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-12
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  • 92
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    Some biological character of Sillago sihama in Hormozgan Province (2018)
    Details
    Publication Date: 2021-05-19
    Description: Sillago sihama, which is a member of Sillaginidae family, is one of the abundant fishes in coastal waters of Hormozgan province. This fish, which is a coastal immigrant, caught by set nets, hooks and beach seine during a year. Sampling was conducted monthly in 14 sites in Hormozgan province during a year (from August 97 to August 98).2.27% of total eatable fishes, which caught was Sillago sihama. The smallest and the biggest fish in length were 10cm and 33cm respectively. The maximum frequency of length was 12 cm. This research showed that this species spawn twice a year, in spring and autumn.
    Description: Published
    Keywords: Biological ; Sillago sihama ; Sillaginidae ; Fishes ; Immigrant ; Nets ; Hooks ; Beach seine ; Length ; Species ; Spawn
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.83-89
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  • 93
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    Studying fish biodiversity and abundance in Boujagh Wetland of Kiashahr, South-Western Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: The fish biodiversity and abundance studied in Boujagh wetland, close to Kiashahr south-western Caspian Sea during the year 2002. In each season, samples were collected by using gillnet, common haul seine, cast net and dip net in a 7-15 day sampling period and found one class (Osteichthyes), eight orders, nine families and 25 species and sub-species of the fishes found in the wetland. We showed that of the order Cypriniformes, two families of Cyprinidae with 14 species and sub-species and Cobitidae with two species are living in the wetland. Other fish orders were only represented by one family: Esociformes by family Esocidae, Syngnathiformes by Syngnathidae, Cyprinodontiformes by Poeciliidae, Siluriformes by Siluridae, Gasterosteiformes by Gasterosteidae, Atheriniformes by Atherinidae and Perciniformes by Gobiidae. Of these orders, Cypriniformes and family Cyprinidae had the most diverse fish species with Blicca bjoerkna being the most abundant.
    Description: Published
    Keywords: Biodiversity ; Fish ; Gillnet ; Osteichthyes ; Species ; Sub-species ; Cypriniformes ; Cyprinidae ; Cobitidae ; Esociformes ; Esocidae ; Syngnathiformes ; Syngnathidae ; Cyprinodontiformes ; Poeciliidae ; Siluriformes ; Siluridae ; Gasterosteiformes ; Gasterosteidae ; Atheriniformes ; Atherinidae ; Perciniformes ; Gobiidae ; Blicca bjoerkna
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.41-54
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  • 94
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    Determination of suitable sex for morphological comparison in populations of Aphanius dispar using geometric morphometrics (2018)
    Details
    Publication Date: 2021-05-19
    Description: Sexual dimorphism is a phenomenon among some fish species such as the members of the genus Aphanius. Among species with sexual dimorphism, morphological analysis needs to be performed separately. Hence, this investigation was carried out to determine suitable sex of Aphanius dispar for morphological studies. A total 180 specimens (male and female) were collected from populations of Sarbaz, Mehran and Shour rivers. Digital picture of speciments were taken from their left sides and then 17 landmark points cover their body shape were determined and digitized using tpsDig2 software. The data after GPA, were analyzed using PCA, CVA and MANOVA. The results revealed that studied population can be differitiated based on their body shap but between male and female of the Shour and Mehran rivers did not found significant different ib their separate analysis. Sexual dimorphism in the head and trunk seems to be a general feature in A. dispar. Based on the results in A. dispar, males can be suggested as proper sex for morphometric studies.
    Description: Published
    Keywords: Aphanius dispar ; Geometric ; Morphometrics ; Determination ; Sex ; Comparisons ; Populations ; Sexual ; Species ; Fish
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.65-74
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  • 95
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    Ecology of helminthes parasites of capoeta Capoeta gracilis from Shiroud River, Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: In the present study 959 specimens of Capoeta capoeta gracilis were studied for their helminth parasites in two sampling areas in Shiroud river. Samplings were carried out during one year from January 2002 to January 2003. Nine species of parasites were identified namely: Clinostomum complanatum, Diplostomum spathaceum, Posthodiplostomum cuticola, Allocreadium sp. (trematoda), Dactylogyrus pulcher, Dactylogyrus lenkorani, Gyrodoctylus mutabilitas (Monogenea) Rhabdochona fortunatowi, Capilaria sp. (Nematoda). The Capillaria sp. was found only in one sampling area. There are significant differences between the abundance and prevalence of Rhabdochona fortunatowi, P. cuticola, C complanatus, D. spathaceum, Allocreadium sp. In two study areas, prevalence, abundance, species richness, diversity equitability and similarity indices were compared between two study areas and the significant differences are discussed.
    Description: Published
    Keywords: Capoeta capoeta gracilis ; Helminthes Parasites ; Specimens ; Sampling ; Species ; Clinostomum complanatum ; Diplostomum spathaceum ; Posthodiplostomum cuticola ; Allocreadium sp. ; Dactylogyrus pulcher ; Dactylogyrus lenkorani ; Gyrodoctylus mutabilitas ; Rhabdochona fortunatowi ; Capilaria sp.
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.73-82
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  • 96
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    A systematic study of Crabs in the Inter-tidal Zone of Hormozgan Province (2018)
    Details
    Publication Date: 2021-05-19
    Description: A systematic study on distribution of crabs in the inter-tidal zone of Hormozgan province, stretches between Bandar Abbas to Bandar Lengeh, was carried out during four seasons for a period of one year (Octeber 1994 to September 1995). Four regions with different bottoms were chosen for sampling. This study was conducted for the first time in Iran and revealed the richness of crab’s species and also gave us a picture of the indigenous species of this region. In survey an attempt was made to study the standing stocks of crabs in this atea. The specimens were identified using identification keys from Malaysia (Lovett, 1981), Pakistan (Bianchi, 1985), the Mediterranean (schneiscr & Bauchot. 1987), Denmark (Jessen & Sparck. 194449), and work of other authors such as: (Abele, 1982; Jones; 1986; Nandi Pramanik, 1994; Titgen, 1982). Identification was conducted through carapace surface patterns, number of surface serrations and edges of the carapace and its lateral outgrowths, shape of eye, shape of appendages espcially chclae (first pair of feet) and the last pair of appendages, presence or absence of on the appendages, shape of telson and body size of the organism. One family belonging in the sub-order Anomura and seven families belonging to the sub-order Brachyura were identified in this region. On the whole 14 specimens were identified upto the species level and 15 specimens were identified upto the genus leveL Due to the absence of identification keys one of the specimens were identified only upto the family level. Till now 15 species of crabs have been recorded in the southern shor. of Iran (Fatemi, 1992; Husseini, 1994; Saeidpour, 1994) and 15 species have been identified and recorded for the first time throughout Iran. This research showed that the species? anginas pelagic's, Macrophthalmus pectinipes, Ocypode saratan and Eriphia sebana were widely distributed in Bandar Abbas, Bostanoo, Berkeh Sephlin and Bandar Lengeh resptxtively.
    Description: Published
    Keywords: Crab ; Eriphia sebana ; Ocypode saratan ; Macrophthalmus pectinipes ; Distribution ; Season ; Species ; First time ; Survey ; Levels
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-16
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  • 97
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    Evaluation and comparison of percent change in species composition and Sturgeon CPUE in 2011and 2012 South coast Caspian Sea, province of Golestan (2018)
    Details
    Publication Date: 2021-05-19
    Description: The marine survey for sturgeon stock assessment was conducted to estimate the abundance of each species, total abundance and their percentage composition.In this study, a sample of 5 stations from the four fishing Golestan province which since 1380, the Iranian Fisheries as fisheries was done selected. Sampling was carried out using the gillnet. The sampling in 2011, 247 specimens including 105 A. persicus specimens, 14 A. guldenstaedti, 44 A. stellatus, 71 Huso huso and 13 A. nudiventris were caught. In 2012, of 281 specimens, 143 A. persicus, 8 A. guldenstaedti, 19 A. stellatus,19 Huso huso and 52 A. nudiventris were caught. Species composition in 2011, including 42 percent of A. persicus, 6 percent of A. guldenstaedti, 18 percent A. stellatus, 29 percent Huso huso and 5 percent A. nudiventris. In 2012, Species composition, including 59 percent of A. persicus, 3 percent A. guldenstaedti, 8 percent, A. stellatus, 22 percent Huso huso and 8 percent was A. nudiventris. The average length of A. persicus in 2011, 162.62±19.8 cm, A. guldenstaedti 149.45±16.26 cm, A. stellatus 126.4±17.42 cm, Huso huso 167.69±60.72 cm and A. nudiventris 139.06±12 cm. In 2012, the average length of A. persicus and A. guldenstaedti to the 144.55±42.12 and 145.8±13.92 cm. The average weight of A. persicus in 2011, 22.38±8.57 gr, A. guldenstaedti 19.24±6.55 gr and A. stellatus 8.70±2.76 gr. In 2012, the average weight of A. persicus 18.66±11.43 gr and A. guldenstaedti 20±7.08 gr. The catch per unit effort (CPUE) in 2011 sampeling, equivalent to 5.23 and sampling in 2013 was equivalent to the 5.73.
    Description: Published
    Keywords: A. persicus ; A. guldenstaedti ; A. stellatus ; Huso huso ; A. nudiventris ; Sturgeon ; Stock assessment ; Evaluation ; Comparison ; Species ; Composition ; Marine ; Survey ; Abundance
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.203-206
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  • 98
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    Unknown
    Mullets found in Hormozgan Moshtas in the Persian Gulf (2018)
    Details
    Publication Date: 2021-05-19
    Description: Mullet are abundant in costal and estuarine waters of Hormozgan. One of the fishing gears used for catching the species is Moshta, one type of set net. In present research 7 species have been identified in catch composition. The most abundant species were Liza carinata and Valamugil seheli respectively. L. vaigiensis, L. melinoptera, L. alata, Valamugil buchanani and Mugil cephalus were other mullet species found in catch composition. The smallest species was L. carinata with an average length of 11 cm and the largest species was M. cephalus with an average length of 35.5 cm.
    Description: Published
    Keywords: Mullets ; Moshtas ; Species ; Net ; Liza carinata ; Valamugil seheli ; L. vaigiensis ; L. melinoptera ; L. alata ; Valamugil buchanani ; Mugil cephalus ; L. carinata ; M. cephalus ; Length
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-12
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  • 99
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    Unknown
    Species identification of freshwater crab in Jajroud river (2018)
    Details
    Publication Date: 2021-05-19
    Description: Jajroud river is one of the most important aquatic ecosystem in Iran (east of Tehran) and consist of variety of different aquatics, of which is a freshwater crab. The crab sample were collected from 5 stations of Taraghion, Khojeer, Latian, Daroee plants and Mamloo dam. The collected samples were studied from point of reproduction and feeding behaviour; and also, carapace length, carapace width and body weight were measured. The most important objective of this survey was to find out the precise species identification. In this regard, sample were transported to the Natural History Museum in Netherland and ultimately, it was certified that all specimens belong to Potamidae family and species of Potamon persicum.
    Description: Published
    Keywords: Freshwater crab ; Potamon persicum ; Species identification ; Species ; Aquatic ; Ecosystem ; Samples ; Feeding behaviour ; Carapace length ; Weight ; Survey ; Specimens
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.57-66
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  • 100
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    Unknown
    Feeding habits of Thunnus albacares in Chabahar coastal waters, southeast Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: During an 11 months study period in Chabahar waters of Oman Sea, 350 Thunnus albacares were caught and their feeding habit investigated. Stomach contents and its emptiness were analyzed for different seasons using customary methods. Results showed squids as being the main food item in T. albacares. Seasonal variation in food items was observed such that squids were staple food item in spring and summer and other fish species in autumn and winter. Stomach emptiness was highest in winter and lowest in summer. Stomach emptiness index suggests the fish being a moderate feeder.
    Description: Published
    Keywords: Feeding Habits ; Thunnus albacares ; Stomach contents ; Squid ; T. albacares ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.33-42
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