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  • 1
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    Economic and social assessment of fish farming in cages in the Southern Caspian Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study aimed to assess the social, economic and fish farming in cages in the Southern Caspian Sea. The Caspian Sea is considered as one of the most important water resources of Iran, in which due to the appropriate weather conditions in the north of the country, has the potential for marine aquaculture. With the implementation of this plan would say that with respect to the proposed initial selection from Kheshtsar in Mazandaran province and Kiashahr in Guilan province with along coastline of about 250 km from the depth of 20 to 100 meters and an the area of about 2027km2 has the cage aquaculture talent. Of course, at the depths of greater than 100 M by using the world technology procedure, there is also the possibility of the establishment of marine cage aquaculture. Now, with the regards of the above potential in the Caspian Sea coastline, it is expected at least 200 cages fish sites farming in with the establishment of 40 cages per site and produce 160,000 tons with creating of 1,000 direct jobs and 2,000 indirect jobs and income 2000 billion gross annual average net profit of 40% could be 800 billion in which will produce of proteins needed part of the country, creating jobs, welfare, prosperity and economy in the region. With the implementation of such national project, it is needed to establish pilot farms to reach the goals: environmental assessment studies, risk assessment, aquatic selection and the use of appropriate cage structures according to ecological conditions of southern Caspian Sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Cage ; Economic activity ; Profitability ; Rainbow trout ; Ecological conditions
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 36pp.
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  • 2
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    The survey of vital condition on Sturgeon fry, when they were released into Tajan River by tagging (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This Tajan river in / April/ 2000 and was followed to one year of Four stations selected from estuary to farah Abad station. Sampling occured to limited: (the survey of characteristic and choloride toxins in above limited in relative of three stations. Forty thousands species of Acipenser persicus fry with the different average weights were delivered fry were tagged and then the tagged fish were released in released stations in the different times. The fishing stations and the survival time in fry in the river, determination of upper and down streams in releasing area, Nutrition, Microbial diseases and estimation of catch populations in repeated fishing were evaluated. The physico - chemical characteristics of water and the evaluation of condamination were surveyed in the river. In addition, .the- evaluation of frequency and biomass (such as benthos and zooplankton were surveyed in the river). Finally, the effective factors in the mortality of fry in relative before and after releasing, the best place for releasing area of fry in the river was introduced into execution selection. The survival time of fry is low in the river and it depends on the distant between from the releasing area to estuary and the releasing time. Fry were passed from estuary after 24 hours and fry were approached to the sea after 48 hours and also the peak migration of them has been from 12 p.m to 3 a.m. The internal migrations don't have toward Upper River and these migrations have toward the sea. Fry haven't fed in survival time but after fourteen days, they caught in coastal section. The gammaridea and hypania (type of hypercilia) were fed by them. Before the releasing, fry have been contaminated by bacterial agents. The contamination rate was 3.3% but after releasing and passed from estuary have not been contaminated. The survey of the chemical and physical features in area indicated that the salinity was ascended higher than six ppt in third decade of April. The other factors indicated a healthy ecosystem. Of course, the increasing of salinity was related to Debi in water that approached to zero. The survey of choloride toxins in water indicated that were lack of difficult survey area in rivers. These toxins have been compared to another toxins such as hexa - choloro - benzen (a -HCB) that this concentration has a high in estuary. The evaluations the biomass of nutrition (Benthos and zooplankton) in the river indicated in the relative to benthic condition was included six classes. They contain bottom invertebrates, they have been identified 11 families and 9 species and so they consist of Insecta, Olighocheata class, Crustancea class, hypercilia class, Crustacea class, Bivalva class, Gastropoda class, it is obvious that the estuary station have a high biomass of benthic organisms and it has higher variation species than other stations. The zooplankton condition, In addition, it is belong to zooplankton that was identified to Rotatoria - Cladocera - Copepoda- Barnacles - Protozoa and forminofera as the beginning of spring season. Zooplanktons have a high variation but the end season, they have a below amount. Although, the gill net has one (cm) in mesh that sturgeon fry entrapped them the main effective factor of mortality about sturgeon's fry took place when sturgeon's fry entered into the sea. But the qoopegative company net of fishing, sturgeon's - fry caught in by catch that this agent were threatened when sturgeon's fry entered in to the sea. The evaluating of two stations for releasing the fry (research and farah Abad stations), the .research station (distance 500 m from estuary) has the best area for the releasing. the sturgeon's fry (fingerling) was introduced into the excution section . Key word Tajan river, Acipenser persicus (Sturgeon's fry gillnet) - nutrition, Microbal diseases, Choloride toxins.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Sturgeon ; Fry ; Insecta ; Olighocheata ; Crustancea ; Hypercilia ; Crustacea ; Bivalva ; Gastropoda
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 134pp.
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  • 3
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    Hydrology, hydrobiology and environmental pollution study of the southern of Caspian Sea basin (10-100 meter depth) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This study was conducted to study of Hydrology, Hydrobiology and Environmental pollution in the southern of the Caspian Sea. 33 stations were selected from Astara (in the west) to Hassan gholi (in the east). In each station, sampling carried out at suface, 10, 20, 50 and 100m depths. Sampling was performed during four seasons in 2004. Sampling stations also divided into three regions, including west (from Astara to Ramsar), middle (from Ramsar to Sari) and east (from Amirabad to Hassengholi). The results showed that maximum of water temperature was 24 ?C at summer in the eastern region while the minimum of water temperature in winter season has been 9.7 ?c in the western region. The average of dissolved oxygen concontration in spring , summer, autumn and winter season were 6.9 , 6.6, 8.2 and 6.7 mg/l , respectively. The maximum value of salinity was observed in spring (13.55 ppt) and minmum value in winter (8.24 ppt). The average of total nitrogen concentration were season was 711, 884, 583 and 669 µg/l in spring, summer, autumn and winter repectively. The average of total phosphorus concentration was 27.9, 37.1 and 42.6 µg/l in spring, summer, autumn and winter, respectively. The average of dissolved silica concentration has varied from 167 to 923.6 µg/l. The five phyla of phytoplankton have identified. The most species diversity was observed in winter (70 species) but the low species diversity has obtained in autumn. The most phytoplankton population was in spring and summer seasons. The cell abundance of phytoplankton in different seasons was fluctuated from 3914*103 to 17337*103 ind/m3. In addition, the phytoplankton biomas was varied 11.4 to 30.7 mg/l. Result showed that distribution of phytoplankton are varied at different areas, layer, seasons and stations. The average of cell abundance of zooplanktons was varied from 2023 to 12364 and/m3 at different seasons. The mean of bioman varied from 9.40 to 43.48 mg/l. In this study, 17 species and one class of macrobenthos were identified. The frequency of Annelida and Biovalvia was higher than all macrobenthos. The average of macrobenthos was 1218±851 ind/m2 and their biomass was 14±15 g/l. The average of PAHs concentration were 0.038, 0.028 and 0.21 mg/l in spring , summer and winter, respectively. The decending trend of heavy metal concentration were Fe〉Mn〉Zn〉Cr〉Pb〉Co〉Cd〉Cu at different seasons in 2004. The maximum concentrations of organochlorine pesticides (OCPs) components in three regions of sampling zone such as , -BHC (middle), β,-BHC (middle), DDT (east) and dieldrin (east part) were 88.3, 35.0, 74.3 & 79.1 g/l during spring, summer, fall and winter, respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physo-chemical parameters ; Plankton ; Benthos ; Enviromental Pollutions ; Hydrology ; Hydrobiology ; Sampling ; Temperature ; Dissolved oxygen ; Dissolved silica ; Species ; Phytoplankton ; Biomass
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 102pp.
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  • 4
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    Economic and social assessment of fish farming in cages in the southern Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25830 | 18721 | 2018-10-13 10:49:04 | 25830 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study aimed to assess the social, economic and fish farming in cages in the Southern Caspian Sea. The Caspian Sea is considered as one of the most important water resources of Iran, in which due to the appropriate weather conditions in the north of the country, has the potential for marine aquaculture. With the implementation of this plan would say that with respect to the proposed initial selection from Kheshtsar in Mazandaran province and Kiashahr in Guilan province with along coastline of about 250 km from the depth of 20 to 100 meters and an the area of about 2027km^2 has the cage aquaculture talent. Of course, at the depths of greater than 100 M by using the world technology procedure, there is also the possibility of the establishment of marine cage aquaculture. Now, with the regards of the above potential in the Caspian Sea coastline, it is expected at least 200 cages fish sites farming in with the establishment of 40 cages per site and produce 160,000 tons with creating of 1,000 direct jobs and 2,000 indirect jobs and income 2000 billion gross annual average net profit of 40% could be 800 billion in which will produce of proteins needed part of the country, creating jobs, welfare, prosperity and economy in the region. With the implementation of such national project, it is needed to establish pilot farms to reach the goals: environmental assessment studies, risk assessment, aquatic selection and the use of appropriate cage structures according to ecological conditions of southern Caspian Sea.
    Keywords: Aquaculture ; Iran ; Caspian Sea ; Mazandaran Province ; Guilan Province ; Cage ; Economic activity ; Profitability ; Rainbow trout ; Ecological conditions
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 36
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  • 5
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    Hydrology, hydrobiology and environmental pollution study of the southern of Caspian Sea basin (10-100 meter depth) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25335 | 18721 | 2018-09-13 12:35:23 | 25335 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted to study of Hydrology, Hydrobiology and Environmental pollution in the southern of the Caspian Sea. 33 stations were selected from Astara (in the west) to Hassan gholi (in the east). In each station, sampling carried out at suface, 10, 20, 50 and 100m depths. Sampling was performed during four seasons in 2004. Sampling stations also divided into three regions, including west (from Astara to Ramsar), middle (from Ramsar to Sari) and east (from Amirabad to Hassengholi). The results showed that maximum of water temperature was 24 ?C at summer in the eastern region while the minimum of water temperature in winter season has been 9.7 ?c in the western region. The average of dissolved oxygen concontration in spring, summer, autumn and winter season were 6.9 , 6.6, 8.2 and 6.7 mg/l , respectively. The maximum value of salinity was observed in spring (13.55 ppt) and minmum value in winter (8.24 ppt). The average of total nitrogen concentration were season was 711, 884, 583 and 669 µg/l in spring, summer, autumn and winter repectively. The average of total phosphorus concentration was 27.9, 37.1 and 42.6 µg/l in spring, summer, autumn and winter, respectively. The average of dissolved silica concentration has varied from 167 to 923.6 µg/l. The five phyla of phytoplankton have identified. The most species diversity was observed in winter (70 species) but the low species diversity has obtained in autumn. The most phytoplankton population was in spring and summer seasons. The cell abundance of phytoplankton in different seasons was fluctuated from 3914*103 to 17337*103 ind/m^3. In addition, the phytoplankton biomas was varied 11.4 to 30.7 mg/l. Result showed that distribution of phytoplankton are varied at different areas, layer, seasons and stations. The average of cell abundance of zooplanktons was varied from 2023 to 12364 and/m^3 at different seasons. The mean of bioman varied from 9.40 to 43.48 mg/l. In this study, 17 species and one class of macrobenthos were identified. The frequency of Annelida and Biovalvia was higher than all macrobenthos. The average of macrobenthos was 1218±851 ind/m^2 and their biomass was 14±15 g/l. The average of PAHs concentration were 0.038, 0.028 and 0.21 mg/l in spring , summer and winter, respectively. The decending trend of heavy metal concentration were Fe〉Mn〉Zn〉Cr〉Pb〉Co〉Cd〉Cu at different seasons in 2004. The maximum concentrations of organochlorine pesticides (OCPs) components in three regions of sampling zone such as , -BHC (middle), β,-BHC (middle), DDT (east) and dieldrin (east part) were 88.3, 35.0, 74.3 & 79.1 g/l during spring, summer, fall and winter, respectively.
    Keywords: Ecology ; Iran ; Caspian Sea ; Astara ; Physo-chemical parameters ; Plankton ; Benthos ; Enviromental Pollutions ; Hydrology ; Hydrobiology ; Sampling ; Temperature ; Dissolved oxygen ; Dissolved silica ; Species ; Phytoplankton ; Biomass
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 102
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