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  • 1
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    Ecological study on fisheries important rivers and bays in the south part of the Caspian Sea 2nd phase: Gorgan Bay (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this study ichthyoplankton, phytoplankton, zooplankton, benthics and hydrochemistry parameters were studied. 9 out of 11 sampling stations were in the Gorgan Bay area and 2 of them were in the mouth of the Bay. Ichthyoplankton survey were carried out in 6 stations and the other surveys such as phytoplankton, etc were done in 11 stations in 2009. Gorgan Bay map and position of sampling sites are given at the end of material and methods section. Biomass and frequency of phytoplankton at different stations, months and seasons were calculated that are presented in Tables 1 to 3. Hydro-chemical parameters such as water temperature, air temperature, visibility, DO, BOD5, pH, Alkalinity (bicarbonate, carbonate and total) , Hardness (calcium, magnesium), CL,EC, Salinity, N (nitrate, nitrite, NH3), Phosphate were measured and results are shown Table 11 . Biomass (mgr/m3) and numbers (ind./m3) of 47 genus of different phylum of phytoplanktons such as Cyanophyta, Chlorophyta, Pyrophyta, Chrysophyta and Euglenaphyta as well as different phylum of zooplanktons consist of Protozoa, Arthropoda, Rotifera and Cyliophora were estimated. Frequency of phytoplanktons (ind/m3) was 131.2, 1.6, 65.3, 18.9 and 23.8 millions respectively. Furthermore, their biomass was 308.4, 1.9, 1358.9, 295.1 and 124.7 mg/m3, respectively. The maximum and minimum numbers were observed in Leptolingbaya belonged to Cyanophyta and Diatoms of Chrysophyta 84.3 and 0.025 million ( ind/ m3) respectively. The maximum and minimum biomass was observed in Gyrosigma (Chrysophyta) and Tetradron (Chloropyta), 12317.3 and 0.014 mg/m3 respectively. The average biomass of zooplankton was measured 531.74, 30.77, 225.07, and 96.26 mg/m3 respectively and the total was attained 883.83 mg/m3 Table 5 . The maximum and minimum biomass of all zooplanktons was estimated in November and July, 3446.23 and 6 mg/m3 respectively. Furthermore, the maximum and minimum numbers of zooplanktons were found in September and July which were 48.4 and 0.002 millions respectively and the average number was 8.4 ind/m3 Table 4 . Also numbers and biomass (gr/m2) of 11 families of benthos which inhabit Gorgan Bay such as Annelida, Mollusca and Arthropoda were investigated in separated stations and distinctive months. The maximum and minimum biomass of benthos was observed in January (42.91 gr/m2) and March (0.6428 gr/m2). The biomass was considerable in April, February, August and December (Tables: 4, 5 and 6).
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Hydrochemistry ; Ecological study ; Fisheries ; Ichthyoplanktons ; Phytoplankton ; Zooplankton ; Benthic ; Sampling ; Biomass ; Temperature ; Visibility ; pH ; Alkalinity ; Salinity ; Phosphate ; Cyanophyta ; Annelida ; Mollusca
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 97pp.
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  • 2
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    Mortality factors in artificially reproduced grey mullet (Mugil cephalus L.) Fries (2018)
    Details
    Publication Date: 2021-05-19
    Description: Cultured nine year old breeders of Mugil cephalus L. were subjected to eight artificial propagation treatments from December to February, 2003. Some female breeders received two injections in an interval of 24 hours, and others received a gradual daily injection of 500 IU HCG per kilogram of body weight for five days and then subjected to the two injection protocol. Male breeders were given 5-10mg of 17-a MT in addition to HCG. The result of the process was the production of 117-2000,000 larvae in six series for each breeder. Water temperature and salinity during artificial propagation process were 20-23C and 32ppt, respectively. For larvae culture two trials were conducted. The final density of larvae was 20 individuals per liter. Water temperature and salinity in larvae culture tanks were 22-24C and 32-33ppt, respectively. The larvae were fed from their second day post-hatching with algae Nannochloropsis oculata with a density of 500000 cells/l, rotifer Brachionus plicatilis with a density of 20 individuals/ml and also Artemia nauplii with a density of 3-200 individuals/l. The particle size of dry feed used was 100, 300 and 500 microns. The daily water exchange in larval culture tanks at the first, second and third weeks of post- hatching were 10, 20-30 and 40-50 percent respectively. In the first round of larval culture trials which were carried out by means of circular tanks under water 80 cm deep; all larvae died 12 days post-hatching. In the second experiment, which was carried out by three black color fiberglass tanks with water 100 cm deep, the survival rate was 0.9 percent 50 days post-hatching. There are two vertical migrations during first two weeks of the grey mullet larvae culture. The first sinking takes place after the second day post-hatching and is probably related to the rapid absorption of the yolk sac and the resulting change in specific gravity. The second sinking happened 8-11days post-hatching and is probably related to the full absorption of oil globule and the resulting increase in specific gravity. These migrations were found coinciding with high larval mortalities (critical points). It seems that the characteristics of larval culture tank such as shape, volume and depth, the nutritional circumstances of larvae and the aeration procedure are important and effective factors for the mullet to pass successfully from these critical periods.
    Description: Published
    Keywords: Rearing ; Breeding ; Fibre glass ; Fish culture ; Mugil cephalus ; Brackish ; Mortality ; Survival ; Larval development ; Fish larvae ; Aquaculture techniques
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.153-160
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  • 3
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    Investigation on the possibility of artificial propagation, cultivation and brood stock management of Vannamei shrimp (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Project was carried out at the Gomishan Centre for training and education which is located 15 km far from Gomishan City in the Golestan Province. Prebroodstocks were chosen from ponds (stocking density: 3/m2). 860 male and 890 female broodstocks were separated and transferred into greenhouse (400 m2). The average growth rate per day was 0.3 g and survival rate was 90%. After reaching 42 g in males and 52 g in females they were ready for Eyes stalk Brood stocks were transferred into propagation hall in June and after a week females gone under Eyes stalk. 10,890,000 eggs were yielded from 50 females and consequently 7,187,050 nauplius were produced. Each broodstock spawned 1.34Times. The maximum hetching was 75% that in was average 64.2%. Mass of Cetocerous Algae was mass produced to be fed for post larvae. Finally 35,000 PL15 were yielded. PL15 were transferred into two half hectare and one 1 ha ponds in July. The stocking dencity was 18 PL/m2. Biometric parameters together with air and water temperatures, and pH were recorded daily. Results indicate that the maximum survival rate was 58% (pond No. 5) and minimum was 52% (pond No. 17). The average weight after 101 days cultivating was 23 g which is appropriate. Also the average daily growth rate was 0.2g and the FCR was 1.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Vannamie Shrimp ; Brood stocks ; Propagation ; Cultivation ; Density ; Survival rate ; Males ; Females ; Larvae ; Temperature ; pH
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 57pp.
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  • 4
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    Genetic variation study on the grey mullet (Mugil cephalus) stocks from Mediterranean Sea, the Pacific Ocean and Oman Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Two of the three objectives of project was carried out success that one of them is following: The genetic diversity of Liza salien(Risso,1810) in the south part of Caspian sea using the Mitochondrial DNA sequencing (mtDNA) was carried out as first objective of project that based on the mitochondrial DNA sequencing (mtDNA) of 16S rRNA was used in order to clarify genetic structure and genetic diversity of lizasaliens in three western (Anzali) , middle(sari) , and eastern(Gomishan lagoon) of south part of Caspian sea. As a result we obtained 552base pairs of 16SrRNA sequence. A total of 6 different haplotypes and 29 variable sites were identified .The average nucleotide diversity(π) and haplotype diversity(h) in samples of all regions were 0.29 , and 0.004 respectively . The results obtained from genetic distance showed low rate in that of 3 regions. Estimates of gene flow indicated there is no reproductive isolation between three regions and also there was not significant genetic differentiation between differentregions (p〉0.05). the findings from the present study suggest that there is equal population of Liza saliens in the studied regions .: Genetic differences and phylogenic relationships among six Mugilidae species (Mugilcephalus, M. capito, Liza subviridis, L. saliens, L. aurata, Valamugilbuchanani) were determined using PCR-sequencing as second objective of project. 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 collected. Samples of an imported, Egyptian species M. capito (this species was mixed with the main imported species as M. cephalusfingerling) were obtained from the Gomishan Research Center in Gorgan. Total DNA from the samples were extracted according to phenol-chloroform method Mithochondrial DNA ,16s RNA was amplified using thermo cyclermachine with universal primers and thensequenced by sending to Takapoozist Company and thereafter to France. 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. saliensandL. 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.Also.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Mugillidae ; Phylogeny ; Population ; mtDNA ; PCR ; Genetic variation ; Grey mullet ; Mugil cephalus ; Diversity ; M. capito ; Liza subviridis ; L. saliens ; L. aurata
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 118pp.
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  • 5
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    Study on biological status of the Gorgan Bay (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Present study carried out between September 2011 and October 2012 in 19 sampling sites in order to investigate the trophy level, productivity, and natural dominant living conditions in the Gorgan Bay. According to the provided maps from the shoreline, depth, and sediment, the total area and volume of Gorgan Bay is 466 square meters and 905.33 million cubic meters respectively. Also the physic-chemical parameters including: water temperature, EC, salinity, transparency, DO, BOD5, pH, Ammonia, Nitrate, Total hardness, Total alkalinity, and phosphate are determined and studies. 3 main phylum, 12 orders, 6 classes, and 12 families from bottom living organisms (macro-benthos) were identified in this region. Standard deviation in TSI was from minimum 37 in March up to maximum 65 in September and the annual average was 53. According to the average TSI in different months, for five months namely as March, April, June, August, and February the dominant situation was eutrophy. For the rest of months namely as May, September, October, November, December, and January the dominant situation was Meso-trophic in the Bay. Based on calculation, minimum and maximum productivity in the Bay were 92.26 and 700.66 Kg per hectare in October and July respectively. The annual average of productivity was 195.10 Kg per hectare.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Trophy level ; Productivity ; Salinity ; Physic-chemical parameters
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 38pp.
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  • 6
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    Identification and study of distribution of local Artemia population in the Golestan province;study of possible artificial propagation & cultivation (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this research were studied Inland waters in the Golestan province including: Shor Lake, Inche Lake, Gharaso region, Anbar olom region and zamiri saits ponds due to obtain distribution of Artemia. Sampling was done monthly from Jul 2007 to Jun 2008 from two satation ((Northern = 1 and Southern = 2). Maximum and minimum of salinity were 295 and 95.3 gr/1 at the Agu and Feb at the station 1 respectively and at the station 2 were 289 and 101 gr/1 at the Sep and Feb respectively. Maximum and minimum of solution oxygen were 6 and 0.8 mg/l at the Feb and Aug at station 2 and 1 respectively. Maximum and minimum of frequency of Artemia 95% and 0.58% at the Mar and May at the station 1 respectively. Maximum and minimum depth of water was 120 and 40 cm at the Apr and Jun at the station 1 respectively. Total lengths of nauplii of Artemia were 491.9, Artemia diameter cysts were 268.8. Maximum and minimum of adult Artemia were measured 12.9 and 8.5 mm respectively. Maximum and minimum of fecundity of Artemia were measured 105 and 12 respectively. The result showed that the Inche Lake is the permanent habitat of Artemia with 100 ha area.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Distruption of Artemia ; Artemia ; Population ; Artificial propagation ; Cultivation ; Sampling ; Nauplii ; Identification ; Distribution
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 45pp.
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  • 7
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    Study of penculture of the common carp ( Cyprinus carpio L.) fingerlings at the Gorgan Bay to the maturity stage (broodstock management) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The aim of present project is study on the possibilities of brood stock production from fingerlings in the penculture condition and the effect of density on it .this project was done during three years with two different treatment and three repetitions in the Gorgan Bay. First treatment with two fingerlings per square meter and the 2nd with four fingerlings per square meter in each pen.To carry out the project at first fingerlings were brought from breeding and recruitment centre –Sijeval ( Kolmeh) and the stocked at the earthen pound with concentrated food .After that they were adaptated with brakish water between 7-10 days and transferred to Gorgan Bay for cultivation with average weight of 93.78±32.66 grams and 20.53±2.37 cm in length. It should be noted that 6 pens ( which surrounded by nets in the water ) were fixed using mast with 15-20 cm in diameter and 5.5 meter in length , Net mesh size was 16 mm with string number 33 of kapron.Feeding was done according to the program two times by giving concentrated food at the period of cultivation Physic -o -chemical factors were measured. biometery was done monthly at each pen and other fishes (unwanted) were observed at the same time. results indicate that in the 1st and 2nd treatments average survival rate was 52.3 and 41 percent respectively with average weight of 410±64.98 grams and 390±52.8 and 28.3±1.79 cm and 27.66±1.57in length.SPSS used to analysethe data such as average length and weight of fish in the treatments and in different months with ANOVA method (p≤ 0.05) . results show that there is no significant difference between treatments.Autopsy observation also showed that fishes ( female and male ) are mature and histological studies showed that most of observed eggs are entirely mature with 800-1200 micron diameter gonad ( male) were mature at the pen in the Gorgan Bay condition .The male and female hormones were evaluated. 17-B- Estradiol and 11-keto testosterone hormones for adult fish (female and male) parents respectively are similar in dense with those adult fish before injection to use at the artificial breeding. Maturation were verified by autopsy, histology and hormone studies.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Penculture ; Carp brood stock ; Common carp ; Cyprinus carpio ; Fingerlings ; Maturity ; Broodstock ; Breeding ; Earthen ponds ; Brakish water ; Survival rate ; Maturation
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 121pp.
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  • 8
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    Ecological study on fisheries important rivers and bays in the south part of the Caspian Sea 2nd phase: Gorgan Bay (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25385 | 18721 | 2018-09-18 05:58:09 | 25385 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this study ichthyoplankton, phytoplankton, zooplankton, benthic and hydrochemistry parameters were studied. 9 out of 11 sampling stations were in the Gorgan Bay area and 2 of them were in the mouth of the Bay. Ichthyoplankton survey were carried out in 6 stations and the other surveys such as phytoplankton, etc were done in 11 stations in 2009. Gorgan Bay map and position of sampling sites are given at the end of material and methods section. Biomass and frequency of phytoplankton at different stations, months and seasons were calculated that are presented in Tables 1 to 3. Hydro-chemical parameters such as water temperature, air temperature, visibility, DO, BOD5, pH, Alkalinity (bicarbonate, carbonate and total), Hardness (calcium, magnesium), CL,EC, Salinity, N (nitrate, nitrite, NH_3), Phosphate were measured and results are shown Table 11. Biomass (mgr/m^3) and numbers (ind./m^3) of 47 genus of different phylum of phytoplanktons such as Cyanophyta, Chlorophyta, Pyrophyta, Chrysophyta and Euglenaphyta as well as different phylum of zooplanktons consist of Protozoa, Arthropoda, Rotifera and Cyliophora were estimated. Frequency of phytoplanktons (ind/m^3) was 131.2, 1.6, 65.3, 18.9 and 23.8 million respectively. Furthermore, their biomass was 308.4, 1.9, 1358.9, 295.1 and 124.7 mg/m^3, respectively. The maximum and minimum numbers were observed in Leptolingbaya belonged to Cyanophyta and Diatoms of Chrysophyta 84.3 and 0.025 million (ind/ m^3) respectively. The maximum and minimum biomass was observed in Gyrosigma (Chrysophyta) and Tetradron (Chloropyta), 12317.3 and 0.014 mg/m3 respectively. The average biomass of zooplankton was measured 531.74, 30.77, 225.07, and 96.26 mg/m^3 respectively and the total was attained 883.83 mg/m3 Table 5. The maximum and minimum biomass of all zooplanktons was estimated in November and July, 3446.23 and 6 mg/m^3 respectively. Furthermore, the maximum and minimum numbers of zooplanktons were found in September and July which were 48.4 and 0.002 millions respectively and the average number was 8.4 ind/m^3 Table 4. Also numbers and biomass (gr/m^2) of 11 families of benthos which inhabit Gorgan Bay such as Annelida, Mollusca and Arthropoda were investigated in separated stations and distinctive months. The maximum and minimum biomass of benthos was observed in January (42.91 gr/m^2) and March (0.6428 gr/m^2). The biomass was considerable in April, February, August and December (Tables: 4, 5 and 6).
    Keywords: Ecology ; Iran ; Caspian Sea ; Gorgan Bay ; Ecological study ; Fisheries ; Ichthyoplanktons ; Phytoplankton ; Zooplankton ; Benthic ; Sampling ; Biomass ; Temperature ; Visibility ; pH ; Alkalinity ; Salinity ; Phosphate ; Cyanophyta ; Annelida ; Mollusca
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 97
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  • 9
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    Mortality factors in artificially reproduced grey mullet (Mugil cephalus L.) fries (2021)
    In:  http://aquaticcommons.org/id/eprint/23740 | 18721 | 2018-07-22 15:23:11 | 23740 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Cultured nine year old breeders of Mugil cephalus L. were subjected to eight artificial propagation treatments from December to February, 2003. Some female breeders received two injections in an interval of 24 hours, and others received a gradual daily injection of 500 IU HCG per kilogram of body weight for five days and then subjected to the two injection protocol. Male breeders were given 5-10mg of 17-a MT in addition to HCG. The result of the process was the production of 117-2000,000 larvae in six series for each breeder. Water temperature and salinity during artificial propagation process were 20-23C and 32ppt, respectively. For larvae culture two trials were conducted. The final density of larvae was 20 individuals per liter. Water temperature and salinity in larvae culture tanks were 22-24C and 32-33ppt, respectively. The larvae were fed from their second day post-hatching with algae Nannochloropsis oculata with a density of 500000 cells/l, rotifer Brachionus plicatilis with a density of 20 individuals/ml and also Artemia nauplii with a density of 3-200 individuals/l. The particle size of dry feed used was 100, 300 and 500 microns. The daily water exchange in larval culture tanks at the first, second and third weeks of post- hatching were 10, 20-30 and 40-50 percent respectively. In the first round of larval culture trials which were carried out by means of circular tanks under water 80 cm deep; all larvae died 12 days post-hatching. In the second experiment, which was carried out by three black color fiberglass tanks with water 100 cm deep, the survival rate was 0.9 percent 50 days post-hatching. There are two vertical migrations during first two weeks of the grey mullet larvae culture. The first sinking takes place after the second day post-hatching and is probably related to the rapid absorption of the yolk sac and the resulting change in specific gravity. The second sinking happened 8-11 days post-hatching and is probably related to the full absorption of oil globule and the resulting increase in specific gravity. These migrations were found coinciding with high larval mortalities (critical points). It seems that the characteristics of larval culture tank such as shape, volume and depth, the nutritional circumstances of larvae and the aeration procedure are important and effective factors for the mullet to pass successfully from these critical periods.
    Keywords: Aquaculture ; Grey mullet ; Mugil cephalus ; Artificial peopagation ; Larvae culture ; Mortality ; critical points ; Golestan Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 153-160
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  • 10
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    Genetic variation study on the grey mullet (Mugilcephalus) stocks from Mediterranean Sea, the Pacific Ocean and Oman Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25375 | 18721 | 2018-09-14 07:39:13 | 25375 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Two of the three objectives of project was carried out success that one of them is following: The genetic diversity of Liza salien(Risso,1810) in the south part of Caspian sea using the Mitochondrial DNA sequencing (mtDNA) was carried out as first objective of project that based on the mitochondrial DNA sequencing (mtDNA) of 16S rRNA was used in order to clarify genetic structure and genetic diversity of lizasaliens in three western (Anzali), middle (sari), and eastern (Gomishan lagoon) of south part of Caspian sea. As a result we obtained 552base pairs of 16SrRNA sequence. A total of 6 different haplotypes and 29 variable sites were identified .The average nucleotide diversity(π) and haplotype diversity(h) in samples of all regions were 0.29 , and 0.004 respectively. The results obtained from genetic distance showed low rate in that of 3 regions. Estimates of gene flow indicated there is no reproductive isolation between three regions and also there was not significant genetic differentiation between differentregions (p〉0.05). the findings from the present study suggest that there is equal population of Liza saliens in the studied regions: Genetic differences and phylogenic relationships among six Mugilidae species (Mugilcephalus, M. capito, Liza subviridis, L. saliens, L. aurata, Valamugilbuchanani) were determined using PCR-sequencing as second objective of project. 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 collected. Samples of an imported, Egyptian species M. capito (this species was mixed with the main imported species as M. cephalusfingerling) were obtained from the Gomishan Research Center in Gorgan. Total DNA from the samples were extracted according to phenol-chloroform method Mithochondrial DNA ,16s RNA was amplified using thermo cyclermachine with universal primers and thensequenced by sending to Takapoozist Company and thereafter to France. 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. saliensand 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.Also.
    Keywords: Aquaculture ; Iran ; Persian Gulf ; Oman Sea ; Caspian Sea ; Anzali ; Sari ; Gomishan Lagoon ; Mugillidae ; Phylogeny ; Population ; mtDNA ; PCR ; Genetic variation ; Grey mullet ; Mugilcephalus ; Diversity ; M. capito ; Liza subviridis ; L. saliens ; L. aurata
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 118
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