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  • Population  (75)
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  • Iranian Fisheries Science Research Institute  (114)
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  • 101
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    The current Economic of Fisheries (Fishery and Aquaculture ) in Guilan ,Mazandaran and Golestan provinces (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Regarding the natural potential and socio-economic advantages of aquaculture development, extension of aquaculture has been raised as one of the priorities of the second to fifth national programs of the Islamic Republic of Ira in the fisheries sector in the past ten years. Proliferation and aquaculture development also plays an important role in increasing employment, exportation, and rural development in rural areas. Although the physical capacities of aquaculture development may be clear, it is necessary to analyze the profitability of farmers and fish market as well. In recent years, reproduction and breeding of new species, in order to increase the income of farmers, have been put on the agenda of the Fisheries Research Institute. In order to increase the maximum utilization of production capacity and increase the warm water pond valume per unit area of land, three species of Indian carp has been imported. The main problems of aquaculture economical research include inadequate information and lack of the collaboration between different experts and aquaculture farmers. The objective of the research was to survey of economical aspects for culturing the imported Indian carp. The fingerlings of the imported species were transferred to the target centers, Southern aquaculture Research institute and Inland waters Aquaculture Research institute. The experiment was carried out as three treatments in triplicates for 9 months. To determine the cost of production and the share of the cost of production factors for farmed fish carp, including the cost of labor, cost of fingerlings, feed and fertilizer costs, maintenance costs, energy costs, depreciation of structures, equipment and buildings for administrative and other costs; past experiences, information and other resources and external experiences questionnaire was employed.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Economic ; Indian carp ; Aquaculture ; Cost ; Farm ; Fisheries
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 168pp.
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  • 102
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    Spat culture of Blak lip pearl oyster (Pinctada margaritifera) produced on Lengeh hatchery in Qeshm and Hendurabi Island (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Dramatic depletion in number of black lip pearl oyster, Pinctada margaritifera in their natural beds despite almost two decades of catch prohibition, encouraged researchers of Iranian Fisheries Research Organization to find a scientific solution to restock the lost oysters. Following successful artificial propagation and producing spat, finding the sites that secure good growth and survival is very important. We tried to compare the growth and survival of oysters in two old natural beds, Michaeil and Hendourabi Island in the Northern part of Persian Gulf. After 14 weeks of settlement spat with an initial size of 16.85 ± 2.85 mm were randomly divided into 2 groups, in each group containing 600 individuals that were in triplicate. One group was transferred to Michaeil and Hendourabi and both groups were set at a depth of 10 m and kept for a year. Juvenile oysters at Michaeil sized 73.35 mm were almost 2 cm larger than at Hendourabi (P〈0.05) after a year of culture. Mortality rate was 20 % in Michaeil that was two times higher than at Hendourabi. Daily growth rate (DGR) showed similar trend during the culture period in both culture sites while it was faster in Michaeil. Maximum and minimum DGR were recorded in May and October in Michaeil with rate of 0.32 mm day-1 and in Feburary in Hendourabi Island with a rate of 0.01, respectively. Linear model was the best model for predicting the length of oyster over the time in both sites. Hinge length and thickness were both bigger in Michaeil, however, length was more stable to show the difference between two sites. More nutrients in Michaeil, that appeared to reduce visibility through the year (P〈0.05) may justify the results of faster growth rate in this site while more sediment on the shells of this area could be a reason of higher mortality rate. This research concludes that both sites are good for pearl oyster culture, however, using new culture methods and equipments that reduce the sedimentation rate on the shells give higher priority to the Michaeil.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Pinctada margaritifera ; Michaeil ; Spat ; Growth rate ; Blak lip pearl oyster ; Culture ; Hatchery ; Fisheries ; Propagation ; Survival ; Mortality ; Nutrients ; Sediment
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 41pp.
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  • 103
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    A survey on health status of marine fish in Bandar-e-imam station (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Mariculture is one of the most important sub sector fisheries industry in Asia-pacific region. There are over 40 marine fish species commonly cultured, such as groupers (Epinephlus spp.), snappers (Lutjanus spp.) and Asian sea bass (Lattes calcarifer). But this industry in Southeast Asia experienced serious disease problem since the late 1980s. Khouzestan province has a coastal line about 200 km with many Creek and suitable area for Mariculture. Marine fish culture in Khouzestan province in floating net cages was successfully initiated in Ghazaleh Creek following development of Epinephlus coioides artificial seed production in the 1372. This study has been conducted since 1384 to 1387 in Bandar-e-Imam station. The aim of this research project was to determine the health management status in cage and hatchery, identification of marine fish pathogens (Bacteria, Fungi and parasite), examination of heavy metal in cages sediment and test the physico chemical factors of water in cages and hatchery. Different parts of broodstocks body and fingerlings including intestine, gills and body surface were examined. In this study, 18 Genus and species of bacteria such as Vibrio alginolyticus, Vibrio anguillarum, Vibrio splendidus, Vibrio vulnificus, Plesiomonas shigelloides , Aeromonas hydrophila, Aeromonas caviae, Pseudomonas sp. Were diagnosed. Also 7 Genus and species of fungi such as: Aspergillus niger , Aspergillus flavus , Aspergillus fumigatus , Penicillium sp. And Fusarium sp. Were isolated. In this survey following of disease appearance parasites such as ; protozoans Amyloodinium sp. And Trichodina sp. In E.coioides and Acanthopagrus latus and Sparidentex hasta , monogean such as Benedenia sp. In E.coioides and S. hasta, isopoda probably Nerocila sp. In nasal cavity of E.coioides and copepods such as: Caligus sp. And Lernanthropus sp. In A.latus and S.hasta were identified. In this study, microorganisms (bacteria, fungi and parasites) isolated from three different marine fishes species, were reported for the first time in Iran. The range of the physico-chemical parameters of water in cages were: DO(5.42-10.24 ppm), BOD5 (1.51-10.24 ppm), No2(0.0197-0.89 ppm), No3(3.53-11.93 ppm), Po4(0.965-6.05 ppm), turbidity ( 4-58 NTU) and ammonia ( 0.0008-0.03 ppm). According to the results parameters such as nitrate, nitrite and turbidity were found more than standard levels. Heavy metals: Ni and Pb relatively high observed.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Mariculture ; Fisheries ; Species ; Epinephlus spp. ; Lutjanus spp. ; Lattes calcarifer ; Bacteria ; Fungi ; Parasite ; Aspergillus niger ; Aspergillus flavus ; Aspergillus fumigatus ; Penicillium sp. ; Fusarium sp. ; Vibrio alginolyticus ; Vibrio anguillarum ; Vibrio splendidus ; Vibrio vulnificus ; Plesiomonas shigelloides ; Aeromonas hydrophila ; Aeromonas caviae ; Pseudomonas sp. ; Grouper ; Snapper ; Sea bass
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 86pp.
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  • 104
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    Hygienic monitoring of freshwater crayfish (Astacus leptodactylus) on Aras Lake reservoir (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Aras dam reservoir situated in the northwest of Iran, west Azarbaijan province, is the only water resource of Astacus leptodactylus harvest in the country that more than 250tons of this species were exported to different countries all over the world, annually. On the other hand, one of the polices of Iranian Science Fisheries Institute is the release of this species into other water resources in the country and for this purpose, the study of risky diseases such as Crayfish pest ( Aphanomysis astasi ) and other zoonotic diseases are considered as the research priorities of aquaculture development of the country. This study was carried out to health screening of Astacus leptodactylus at Aras dam reservoir from winter 2013 to fall 2014. In this regard, A total of 394 harvested livefreshwater crayfish Astacus leptodactylus (255males, 139females) weretested. 9 epibionts and parasites peritrich protozoans were identified. From Metazoan parasites group, Branchiobdella kozarovi with incidence rate of (100%) in obtained samples was the only isolated organism from this group that identified up to species level. There was a heavy damage in gills of samples with Aeolosoma hemprichi (Annelid) in winter with90% prevalence. Furthermore, Other Epibiont fouling organisms such as Rotatoria; free living nematods and suctoria were observed in this survey. The fungi study of the lesions and melanized spots of mentioned samples revealed their infection to Penicillium expansum; Aspergillus flavus; Alternaria sp. ; Fusarium sp. and Saprolegnia sp. The results of bacterial study confirmed the presence of pathogen bacteria in Astacus leptodactylus. The most frequency percentage ( 15.16%) in hepatopancrease were related to Aeromonas hydrophila and the least one ( 1.37%) were due to Yersinia bacteria . Also, only Aeromonas hydrophila and Staphylococcus aureus were isolated and identified from heamolymph, respectively. The results revealed that the combination of Salmonella typhi, Escherichia coli and Staphylococcus sp. has caused the most infection rate while. Yersinia ruckeri and Salmonella typhi has caused the least infections in Astacus leptodactylus. According to the isolation of 6 bacteria species from hepatopancreas and 2 species from heamplymph , it can be concluded that hepatopancreas enjoyed the higher infection rate compared to haemolymph in the obtained samples.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Aquaculture ; Astacus leptodactylus ; Health screening ; Hygienic ; Freshwater ; Crayfish ; Species ; Fisheries ; Aphanomysis astasi ; Parasites ; Metazoa ; Aeolosoma hemprichi ; Epibiont fouling ; Alternaria sp.
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 66pp.
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  • 105
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    The survey on Imported F1 generation carp species in order to enhance genetic diversity of chinenese of basic domesticated carp population in Iran (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This project has done with the collaboration of Bnyad mostazafan (Ran agriculture and livestock Co.) with goal of increasing efficiency of warm water fishes( Chinese Carps) production. The fish were purchased from China (B. G.) in two parts in Jun 2014. The fish then transferred and quarantined to the ponds in Aghili’s farm In Azadshar using container trucks. The biological parameters of fish such as growth rate were measured during the experiment. The growth rate were obtained 9, 16, 16 and 14% for common carp, big head, silver carp and grass carp, respectively. The result shows that production of experimental ponds (ponds 2 and 4) were obtained 3473 kg/ha while the control ponds produced 2700kg/ha 1n 1393. In general the production were increased 31% when comparing with average of local production and raised 26% when comparing with average production of the entire country in 1393. In this study showed that by importing the F1 generation of Chinese carp, it can expected that production will be increased to 1.5 times of current carrying capacity as long as using aeration system and appropriate management.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Carp ; Species ; Genetic ; Diversity ; Population
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 70pp.
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  • 106
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    Conservation and restoration of Caspian salmon (Salmo trutta caspius) stocks in the southern Caspian (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The project is funded by the CASPECO Project which is the Third Phase of the GEF supported project in the Caspian Sea region titled “The Caspian Sea: Restoring Depleted Fisheries and Consolidation of a Permanent Regional Environmental Governance Framework” , and implemented by the Iranian Fisheries Research Organization (IFRO) in partnership with four Coastal Research Centers affiliated to IFRO, Coldwater Fishes Research Centre (CFRC).The project's objective is to improve the conservation and restoration of Caspian Salmon (Salmo trutta caspius) stocks. In accordance with IUCN criteria Caspian Salmon is placed in the red list of endangered fish. In the recent decades the destruction of habitats for juveniles, reduction of genetic diversity and fish immune system were main causes of the Caspian salmon decline. Numbers of public meetings were held with participation of fishing communities’ representatives, experts, relevant local authorities and experts of the IFRO and Iranian Fisheries Organization (IFO), Iran Environment Protection Organization (IEPO), Water Resource Management (Ministry of Energy) and University senior professors, in order to create interaction and understanding of the project objectives. Educational awareness and extension program were conducted with the involvement of fisheries communities, private sector and NGO associations. The results of the project suggests that cross-sectoral coordination for sustainable fisheries can be achieved through building partnerships and enhancing communication between the environment, private , fisheries sectors and academia. Cross-sectoral cooperation through this project improved public awareness on growing risks facing Caspian Salmon from different sources including local sources (illegal fishing and over-fishing, urban wastewater, environment destruction, industrial pollutants, pollution of air and water resources), new emerging and invasive organisms, climate change, implications of the Caspian salmon population decline on economic and social affairs of the people who depend on them for their livelihood and food security and their role in fish stock protection. The project, through its capacity building, extension and educational programs and efforts to link science to management, could translate scientific findings into an action agenda for managers and policy makers that can bring an improvement in the future of the Caspian Sea salmon stock.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Environmental ; Conservation ; Salmo trutta caspius ; Caspian salmon ; Fisheries ; IFRO ; Juvenile ; Genetic diversity ; Immune system ; Illegal fishing ; Pollution
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 194pp.
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  • 107
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    Monitoring of fresh water fish farms in north of khouzestan province for mortality emphasis on silver carp (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Carp fishes culture is one of the most important subsector fisheries industry in Khouzestan province. Every year in summer high mortality occurred in carp fishes farms specially in silver carp of north Khouzestan province. Inspection of silver carp for identification microorganisms agents (Bacteria, Fungi, Parasite and virus: SVC,KHV), determine total plate count, examination physic chemical factors of farms water, histopathology, identification planktons, the main objectives of this study, which was held in 2012. 180 silver carp from 5 farms (10 ponds) with high mortality in years ago were collected in north Khouzestan province and then differents parts of fish body including: intestine, gills, body surface, eyes and liver were examined. Physico chemical parameters and plankton sampled monthly. Physico chemical parameters of water were measured all over culture period for 960 times as follows: Do(4.45-8.5 ppm), BOD5(1.1-9.25 ppm), temp(19-33•c), pH(6.82-8.6), total hardness(348-10053), turbidity(5-56 FTU), Amonia(0.001- 0.06 ppm) and co2( 0.88-13.2). From a total 180 fish examined, 136 (75%) showed unknown algae infestation and 126 (70%) showed parasitic (Dactylogyrus, Gyrodactylus and metacercaria Diplostomum). The results of biotic parameters in farms showed that cyanophycae (Cylindropermopsis, Merismopedia and Nitzeshia) were the most group of phytoplanktons. Histopathological studies have shown necrosis in tobules kidney, degeneration hepatocyte and hyperplasia in gill cells and also results demonstrated the mean of total plate count (0-376 CFU/ml103). 60 samples with sighn severe hemorrhagic on surface body were collected for virology studies by PCR procedure (IQ2000 kit) and have shown which 3 sample suspected to KHV but SVC was not identified.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Silver Carp ; Water physic chemical factor ; Microorganisms ; Histopathology ; Fresh water ; Mortality ; Fisheries ; Bacteria ; Fungi ; Parasite ; Virus ; Planktons ; Dactylogyrus ; Gyrodactylus ; Cyanophycae ; Cylindropermopsis ; Nitzeshia ; PCR
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 110pp.
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  • 108
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    Potential estimation and exploitation of large Pelagics in the Persian Gulf and Oman Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In order to come up with the responsible fishing pattern, there was a need to identify some of the biological characteristics and population dynamic parameters of yellowfin tuna, skipjack and longtail tuna in the Persian Gulf and Oman sea. Occurrence of empty stomach was high in all the specimens obtained from the gill net fisheries. Purple back flying squid was the most dominant prey species observed in the yellowfin tuna study (61% in males and 57% in females). The length of maturity (Lm50%) for yellowfin tuna was estimated 76 cm , 62.5 cm skipjack and 62.5 cm longtail tuna. Length range of skipjack was from 31-100 cm and bony fishes were the most dominant prey species observed in the skipjack. The monthly gonad somatic index was driven higher values after June which could be indicated as spawning period. The catch per unit of effort of three purse seiners (Azadegan 1, 2, 3) was compared in 1998- 2000. The species composition was 47% yellowfin tuna, 51% long tail tuna and 2% skipjack.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Exploitation ; Pelagics ; Biological characteristics ; Population ; Yellowfin tuna ; Skipjack ; Longtail tuna ; Specimens ; Gill Net ; Fisheries ; Purple back flying squid ; Species ; Maturity ; Length ; Gonad Somatic Index ; Spawning ; Estimation ; Potential
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 150pp.
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  • 109
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    Identification Genetic characterization and population of Barbus brachycephalus caspius, Lucioperca lucioperca , Rutilus rutilus caspius , Rutilus frisi kutum and Salmo trutta caspius in southern part of the Caspian Sea by molecular method (Microsatellites) and formation DNA bank (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this study genetic characterization of Barbus brachycephalus caspius, Lucioperca lucioperca , Rutilus rutilus caspius , Rutilus frisi kutum and Salmo trutta caspius were examined by 611 samples from regions in East (Guilan province), Middle (Mazandaran province) and west (Golestan province) of southen part of the Caspian Sea. DNA was extracted from fin tissue by phenol - chlorophorm method and then PCR was performed using special primers. Statistical analysis of data was performed by Gene Alex, MEGA and Arlequin softwares. - Rutilus frisi kutum: The results showed that nine of ten primers were polymorphic loci. The mean of effective and observed alleles were 7.26±0.49 and 4.37± 0.35 respectively. Also, the mean of expected and observed heterozygosity were 0.55±0.03 and 0.69±0.02 respectively. Of the analysed loci, all of the samples (except Tajan and samples in LOC4 and Gilan samples in MFW2) possible tests were found to deviate significantly from the Hardy–Weinberg equilibrium(P〈0.05). The genetic diversity was significantly different between samples of Golestan and Gilan, Golestan and sefidrood, Golestan and Tajan, Mazandaran and sefidrood and Gilan and Tajan (p〈0.05). - Rutilus rutilus caspius: Sevan variable microsatellite loci were used to investigate genetic diversity and population structure of R. rutilus caspius. The mean of effective and observed alleles were 5.75±0.30 and 4.76± 0.25 respectively. Also, the mean of expected and observed heterozygosity were 0.58±0.18 and 0.73±0.01 respectively. All of the samples (except golestan samples in LOC3) possible tests were found to deviate significantly from the Hardy–Weinberg equilibrium(P〈0.05). Of the analysed loci, the genetic divergence was significantly different between samples of Golestan and Gilan, Gilan and Mazandaran and Gilan with Gorgan bay (p〈0.05). - Salmo trutta caspius: Genetic characterization of S. trutta caspius was comparatively analyzed with mitochondrial DNA sequencing that 45 haplotypes was observed. The average of expected and observed heterozygosity were 0.61±0.35 and 0.33±0.12 respectively. The maximum of haplotype diversity (0.089±0.04) was in sardabrood river and the minimum was in Astara river (0.81±0.02). Also, the maximum of nucleotid diversity was 0.13±0.07 in Sardabrood and Chalos rivers and the minimum was 0.11±0.06 in Tonekabon river. In addition, the maximum and minimum of FST was 0.08 and 0.01 respectively. Of the analysed loci, the genetic divergence was significantly different between samples of Astara and Chalos, Astara and Tonekabon, Chalos and Karganrood and Tonekabon with Kaganrood (p〈0.05). - Barbus brachycephalus caspius: The size of amplified fragment was 800 bp in all of the samples. There were 24 variable loci and 12 haplotype that the maximum of haplotype was in Gilan area (8 haplotype). The average of expected and observed heterozygosity were 0.003±0.35 and 0.42±0.12 respectively. The results showed that the haplotype diversity was significantly different between samples of Sefidrood whit other samples (p〈0.05). In addition The maximum of nocleotid diversity was 0.005±0.003 in Sefidrood and minimum was 0.001± 0.001 in Tajan river. Of the analysed loci, the genetic divergence was significantly different between samples of Gilan and Tajan, Mazandaran and Sefidrood (p〈0.05). - Lucioperca lucioperca: The genetic diversity of L. lucioperca was analyzed by using microsatellite markers. Seven primer sequences available for were tested to amplify microsatellite loci that all of loci were polymorphic. The mean of effective and observed alleles were 6.14±0.45 and 3.88±0.34 respectively. Also, the mean of expected and observed heterozygosity were 0.662±0.03 and 0.70±0.02 respectively. The most of samples in PflaL6 , PflaL7and PflaL8 loci possible tests were found to deviate significantly from the Hardy–Weinberg equilibrium (P〈0.05). The maximum of FST was 0.30 between Gilan and Mazandaran samples that there were minimum gene flow (8.18). The genetic divergence was significantly different between samples of Gilan and Mazandaran and Golestan whit mazandaran (p〈0.05).
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Genetic variation ; Barbus brachycephalus caspius ; Lucioperca lucioperca ; Rutilus rutilus caspius ; Rutilus frisi kutum ; Salmo trutta caspius ; Identification ; Population ; Genetic ; DNA ; DNA bank ; Molecular ; Microsatellites
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 82pp.
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  • 110
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    The study of fluctuation of large pelagic stock (yellowfin tuna, skipjack tuna, longtail tuna, Narrow-barred Spanish mackerel ) in order to optimum exploitation in the Persian Gulf & Oman sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The study of fluctuation of large pelagic stock (yellowfin tuna, skipjack tuna, longtail tuna, Narrow-barred Spanish mackerel ) in order to optimum exploitation in the Persian Gulf & Oman sea This study was carried out from 2005-07 in order to acquire some biological characteristics and population dynamic parameters for stock management and responsible fisheries. Thunnus albacares (yellowfin tuna), katsuwonus pelamis (skipjack tuna), Thunnus tonggol (longtail tuna) and scomberomorus commerson (Narrow- barred Spanish mackerel) were sampled. In total, length frequency of 9345 specimens of yellowfin tuna were analyzed. Size range was 37-172 cm. Teleost fishes were the most dominant prey species observed in this study (42%), Occurrence of Potunus Pelagicus was found to be the second (28%).Sthenoteuthis oualaniensis (22%), Natosquilla (5%) and octopus (3%) also were identified in the gut content of the yellowfin tuna. Length of maturity (50%) of yellow fin tuna was estimated 77.2 cm and spawning season was started from May. 8443 specimens of skipjack with size range of 32-90 cm were sampled. 48% of food items were teleost fishes. Squid and shrimp were also identified. Spawning season was begun from June. Growth parameters & fishing mortalities of yellow fin tuna and skipjack tuna were also estimated. Size range if longtail tuna was from 26-125cm Length infinity was estimated 132.3 cm with growth parameter of 0.35 per year. In total 10451 specimens of narrow- barred Spanish mackerel were sampled. Size range was from 20-164 cm. Teleost fishes were the most dominant prey species observed in the study (91.3%). Crustaceans (0.6%) and Indian squid (0.2%) also were identified in the specimens. Length maturity (50%) was estimated 83.6cm.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Fluctuation ; Pelagic ; Yellowfin Tuna ; Skipjack tuna ; Longtail tuna ; Narrow-barred Spanish mackerel ; Population ; Fisheries ; Sthenoteuthis oualaniensis ; Natosquilla ; Octopus ; Maturity ; Indian squid ; Specimens
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 102pp.
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  • 111
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    Establishment of Herbarium (Stock collection) of the Algae of the Southern part of the Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The algal herbarium was set up and put into operation officially since 22 August 1993 at the Ghazian research station of the Gilan Fisheries Center. Several samplings were carried out from different regions of the Anzali Lagoon and Parts of the Southern shores of the Caspian Sea. The Samples Collected are being stored in the Laboratory in Living and non Living form. 163 Living samples of 23 phytoplankton species are stored in the form of different types of inoculants liquid media and agar Plates. The species collected are as follows: Nodularia sp1, Nodularia sp2, Spirulina sp. Oscillatoria sp., Anabaena sp1,Anabaena sp2, Dactylococcopsis raphidiodes Lyngbia sp., Ankistrodesmus falacatus, Ankistrodesmus sp., Scenedesmus abundans S. acuminatus, S. obliquus, S. quadricada, Chlorella vulgaris Thalassionema nitzschioides, Cyclotella sp., Rhizosolenia calcar avis, Navicula sp., Bacillaria sp. Pure cultures of seven phytoplankton species have been developed which include: Scenedesmus abundans, S.obliquus, S. acuminatus, S. quadricada, Chlorella vulgaris, Spirulina sp.and Ankistrodesmus falacatus. The non Living sampeles are stored dried or fixed in suitable Preservatives. More than 200 phytoplankton specimens are available in the Laboratory at present, of which 100 species have been identified.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Herbarium ; Stock collection ; Algae ; Fisheries ; Samples ; Phytoplankton ; Species ; Spirulina sp. ; Nodularia sp. ; Oscillatoria sp. ; Anabaena sp. ; Lyngbia sp. ; Dactylococcopsis raphidiodes ; Ankistrodesmus falacatus ; Ankistrodesmus sp. ; Scenedesmus abundans ; S. acuminatus ; S. obliquus
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 58pp.
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  • 112
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    Artemia population changes on Urmia Lake (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-12-05
    Description: The dynamics of Artemia population of Urmia Lake was investigated to provide the technical information, which is necessary for sustainable management of Artemia in Urmia Lake. The study covers different aspects comprising of monthly estimation of Artemia biomass and cysts, annual evaporation of Lake water, average precipitation in catchment areas and also water turbidity in Urmia Lake, during the 2004-2007. Results showed dramatic decline in the Artemia population compared to the previous years, Reduction of average annual precipitation and increased water usage in Urmia Lake catchment area during last decade, has reduced the annual quantities of flowing waters to the Lake. Although the estimated trophic state index (TSI) which indicated the mesotrophic condition during the studied period, therefore, exceeding salinity to higher than the saturated level had adverse effects on phytoplankton growth. Furthermore, nutrient transfer by the rivers to the lake caused to produce of halophilic bacteria and other obtrusive protozoas which has created very unsuitable condition for Artemia grazing. These events confirm the role of salinity as a major environmental factor that affects Artemia resources in their natural habitats. It can be proposed that a method to manage the lake ecosystem and its Artemia population through construction dividers, such as dikes between the north and south parts of the lake to reduce the salinity at some parts of Urmia Lake will be applicable.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Environmental ; Artemia ; Population ; Biomass ; Cyst ; Turbidity ; TSI ; Phytoplankton ; Growth ; Nutrients ; Halophilic bacteria ; Protozoa ; Salinity ; Ecosystem
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 88pp.
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  • 113
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    Feasibility study on semiintensive polyculture of chainess and Indian carps in I.R.IRAN (Guilan province) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-12-05
    Description: 15000 juvenile Indian majour carps (Labeo Rohita,Cirhinus merigala, Catla catla) imported (200 ) and transferred to the earthen ponds in Astaneh Fisheries Research Station , In order to assess the viability of rearing under the climatic condition of north part of Iran and also achieve some growth parameters from the larval stage to market size.The fry with 300 mg weight, were released in to 12 ponds.specimens were separated to tree experimental categories: 1= (30%indian carp and 70% chinees carp) , 2= (50%indian carp and 50% chinees carp) , 3= (70%indian carp and 30% chinees carp) .single chinees carp production were used as control . fishes were fed with artificial food and also with the natural products of the ponds which were enriched with organic fertilizers, after being equally stocked in the ponds .During the experiment, oxygen level ,PH, turbidity, and temperature were measured . Monthly fry samples were taken, for weight and length biometrical analysis and also determination of the weight gain percentage, average daily growth rate, specific growth rate. Results have indicated adaptations and considerable growth in this species, with an increase from the initial weight of 300 mg to an average of 13.5±1.6 mg in 50 days period until the end of November for fingerlings. Also the average weight of growing phase (second year of production ) was 647g. for Labeo Rohita ,420 g. for Cirhinus merigala and 734g. for Catla catla. The special growth rate(SGR)in Roho was 4.51 %.and 3.9 % for merigal and6.2 % for Catla while for Chinees carps SGR was 4.9, 6.7, 7.6 and 5.8 for silver carp,grass carp, common carp and big head respectively. Results revealed that the Indian majour carps compatibility with the condition in Gilan province was succesfull and the combination of species and optimization of their compatibility were remind for futhre studies.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Experimental ; Indian carp ; Growth ; Labeo Rohita ; Cirhinus merigala ; Catla catla ; Polyculture ; Juvenile ; Earthen ponds ; Fisheries ; Rearing ; Larval stage ; Fry ; Specimens ; Artificial food ; Fertilizers ; pH ; Turbidity ; Temperature
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 68pp.
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  • 114
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    Analyzing the effects of aquaculture and rebuild aquatics stocks on fisheries development in the Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-12-05
    Description: Using SWOT analysis with traditional matrix and quantitative matrix methods, the strategies to benefit from strengths and opportunities to vanishing weaknesses and decrease of threats for strategic management of aquaculture in Iranian Northern provinces was surveyed. Utilizing researches held in fisheries research centers and existence of aquaculture experts in vicinity, activation of veterinary organization in production and post production, and entering new brood stocks with desirable growth are the main strategies for developing rainbow trout and Chinese carps culture in Iranian Northern provinces. In sturgeon fishes culture, independence of farms from fingerlings produced by governmental complex and diversification the cultured fishes using new species and hybrids can develop this part of aquaculture. Avoiding illegal fishing in sea and rivers, preserving the population of Caspian Sea fishes, entering new fish species which their resources are decreased extremely to breeding and fingerling production cycle, and using pike perch and bream while they migrate to Anzali Lagoon from Caspian Sea, instead of freshwater brood stocks will cause the output of sea enhancement and sea ranching activities to increase, and fisheries return coefficient of these fishes will rise. Using quantitative matrix and scoring method, it was defined that aquaculture in Iranian Northern provinces are extremely approved and acceptable and the score of strengths is more than weaknesses and opportunities more than threats. By using strategic management, these activities can be more developed.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: SWOT ; Strategic management ; Aquaculture ; Sea enhancement ; Sea ranching ; Traditional matrix ; Quantitative matrix ; Fisheries ; Survey ; Culture ; Species ; Illegal fishing
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 504pp.
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