389 Study of Natural and Fishing Mortality and Exploitation Rate of Common Kilka Clupeonella cultriventris in Southeast Part of the Caspian Sea (Babolsar)
The objective of this study was to estimate natural, fishing and total mortality, survival and
exploitation rates of Clupeonella cultriventris in the southern Caspian Sea. Survival rate
and natural mortality were calculated using catch curve and Pauly methods, respectively.
Natural and fishing mortality have been estimated up to 0.671yr-1 and 0.849 yr-1,
respectively. According to catch curve method, the annual survival rate of common kilka
has been estimated up to 0.218 yr-1. With owning this survival rate, the instantaneous
coefficient of total mortality of common kilka has been estimated up to 1.52 yr-1. The
exploitation rate of common kilka has been estimated up to 0.55. It was revealed that
common kilka has been dominant in the catch because of habitat expansion and the
change in life depth. It was concluded that common kilka stock is under over-fishing now
.

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بررسی مرفولوژیک و برخی خصوصیات زیست شناسی ماهی مخرج لوله ای (Rhodeus Sericeus) در رودخانه های هراز و محمود آباداستان مازندران حفاظت از اكولوژي درياي خزر، توسعه و بهره ‌وري پايدار تهیه فرآورده كتلت ماهي Fish cake از فیله ماهی بيگ هد بهبود رشد لارو تاسماهي ايراني توسط دافني غني سازي با روغن كبد ماهي رسوبات ميكروفلور بررسی اثر سطوح مختلف مکمل آنزيمي ناتوزیم پلاس بر عملکرد ماهی قزل آلای رنگین کمان در جيره حاوي کنجاله کانولا فوايد و کاربرد پروبيوتيک ها در جيره غذايي ماهی و ميگو ارزش تغذیه ای کنجاله کانولا فرآوری شده در جیره ماهیان اثر متقابل سلنيوم و چربي بر ترکيب اسيد چرب بافت ماهي قزل آلاي رنگين کمان Study of the natural and fishing mortality and exploitation rates of bigeye kilka (Clupeonella grimmi) in the southeast part of the Caspian Sea (Babolsar) Population dynamics and biological characteristics of kilka species (Pisces: Clupeidae) in the southeastern coast of the Caspian Sea Study of Natural and Fishing Mortality and Exploitation Rate of Anchovy Kilka Clupeonella engrauliformis in Southeast Part of the Caspian Sea (Babolsar)
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