Fish cage culture is one of the best aquaculture systems in large water resources that, despite the physical and chemical conditions of uncertainty for farmed fish due to the high density of predatory or disturbed aquatic species, it is not possible to directly release farmed species. Freshwater fish farming in the cage is one of the important industries to supply protein source and meet market demand for freshwater fish. Undesirable water quality reduces profits, decreases production quality and cause potentially risks to human health. Success in the modern aquaculture business depends more on the suitability of the water source in terms of water quality, water quality variables, seasonal climate and events in the new aquatic ecosystem. Cage aquaculture development is a program priority of 6 Th development plan and will provide a good opportunity for employment. Therefore, the expansion of fish cage culture in the lakes behind inland dams without planning the environmental consequences of increased nutrient loads can have negative consequences not only in fish cage culture but also in the water resources fishing industry. This study was carried out in the framework of 4 projects aimed at studying phytoplankton population and benthic invertebrates, determination of bacterial contamination indices, evaluation of trophic status and quality of water, and determination of appropriate fish species capacity and species for cage rearing in Aras, Hasanloo and Shahid Ghanbari dams. Executed for one year from 2017 to 2018. The results of this study showed a direct relationship between total and fecal coliform contamination in all dams with increasing temperature. Mean (± standard error) of total and fecal coliforms (MPN / 100 ml) in Shahid Ghanbari, Hassanloo and Aras dams during the year were 28 ± 1.1, 15 ± 0.6, 61 ± 1.1, 0 ± 32.5, 237 ± 6.5, 121 ± 2.6, respectively. Comparison of mean for microbial indices in Shahid Ghanbari and Hassanloo dams indicated that it is suitable for fisheries exploitation, whereas microbial contamination of the Aras dam is out of breeding standards including cage and pen culture. But it is suitable for fresh water crayfish. Phytoplankton and benthic invertebrate population studies of Aras Dam Lake, Hasanloo and Shahid Ghanbari, show a great potential for their primary and secondary production in fish culture, but due to over-entry of wastewater and predatory organisms such as perch and Silorus glanis and release of cultured species, have not been successful in recent years and production levels have declined. Investigation of bio-factors in this study showed that Hassanloo Dam reservoir was suitable for fish cage culture compared to other studied dams. Research on the Aras trophy showed that this lake is a hyperotrophic reservoir and high phosphorus levels result from agricultural runoff enterin. The Shahid Ghanbari dam has hypertrophy and the Hasanloo dam becomes eutrophic to hyperthropotropic. The concept of carrying capacity, lack of freshwater resources, and hyperthrophic states in all locations and seasons means that ecologic condition in the Aras and Shahid Ghanibari Reservoir Lakes were not suitable for cage culture and were not recommended for this purpose. . an‎d also use these facilities. Hassanloo Dam also has limited capacity for fish cage culture. Since the Sixth Development Plan cited a high capacity for fish cage culture in these dams by the Iranian Fisheries Organization, the results of this study highlight the actual capacity and capacity of the dams studied. Determining the security of private sector investment and on the other hand the fisheries planning targeted for these resources were included in the 1400 horizon outlook in the province's aquaculture development operational plan.

آذربايجان غربي , تروفي , ظرفيت برد , قفس , ماهي , سد حسنلو , سد ارس , سدشهيد قنبري , زيستي , غير زيستي

تهران موسسه تحقيقات علوم شيلاتي كشور

جدول، نمودار، نقشه، رنگي

موسسه تحقيقات علوم شيلاتي كشور 58958