توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Stock Management Implication of Caspian kutum (Rutilus frisii kutum Kamensky, 1901) in Iranian Waters of the Caspian Sea
اطلاعات انتشار: ECOPERSIA، دورهجدید،اول،شماره۲، Spring ۲۰۱۳، سال
تعداد صفحات: ۱۲
Recently the previous Caspian ecosystem is in a catastrophic condition which caused changes in the absolute and relative abundance of the commercially important Caspian kutum (Rutilus frisii kutum) in Iranian waters. The paper presents estimates of yield–per–recruit and spawning biomass–per–recruit under various harvest strategies of Fmax, F0.1, F30%. It proposes a method for estimating acceptable biological catch (ABC) that accounts for large differences in the quality and quantity of information and available data. The current average Y\R (with F=0.61\y, and tc=3.2 y) was 218.3 g per recruit, which indicates that the fishery is operating below the maximum Y\R at 236.9 g when tc = 3.5 y. The Y\R was the highest at Fmax and F0.1, when tc = 4 y (244.8 g and 214.2 g), respectively. The F30% value was 0.85\y at tc of 4 y with the SB\R of 338.3 g. The Fcurrent (0.61\y at current tc is 3.2 y) is higher than the corresponding reference points, F0.1 (0.47\y) and F30% (0.46\y). The ABC of kutum was estimated at 7,850 mt in 2009–2010.
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