451 Population dynamics and biological characteristics of kilka species (Pisces: Clupeidae) in the southeastern coast of the Caspian Sea
Abstract
The aim of the present study was to investigate the age structure, length-weight relationship,
sex ratio, sexual maturity stages, growth parameters, natural and fishing mortality coefficients
of three species of kilka, including common, anchovy and bigeye kilka. The fork length–
weight relationship of common, anchovy and bigeye kilka were calculated as W=0.000153
FL2.37, W=0.000349 FL2.18 and W=0.00160 FL2.97, respectively. The parameters of the von
Bertalanffy growth curve for length were L = 143.5 mm, K = 0.30 yr-1 and t0 = -1.02 yr for
common kilka; L = 151.9 mm, K = 0.28 yr-1 and t0 = -1.12 yr for anchovy kilka and L =
148.6 mm, K = 0.46 yr-1 and t0 = -0.18 yr for bigeye kilka. The instantaneous coefficient of
natural mortality of common, anchovy and bigeye kilka were estimated as 0.671, 0.633 and
0.881 yr-1, respectively. The current exploitation rates of three species were estimated as 0.55,
0.41 and 0.26 for common, anchovy and bigeye kilka, respectively. The results suggest that
common kilka stock is under over-fishing now.

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موضوعات مرتبط
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) Study of Natural and Fishing Mortality and Exploitation Rate of Common Kilka Clupeonella cultriventris in Southeast Part of the Caspian Sea (Babolsar) 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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