رشد و قطر خار باله سینه ای بچه تاس ماهی ایرانی (acipenser persicus) پرورشی جنوب دریای خزر

رشد و قطر خار باله سینه ای بچه تاس ماهی ایرانی (acipenser persicus) پرورشی سایتهای جنوب شرقی و غربی دریای خزر پیش از رهاسازی به دریا بررسی گردید. پس از زیست سنجی بچه ماهیان، خار باله سینه ای سمت راست آن ها جدا گردید، وزن شد و اندازه آن ها ثبت گردید. هیچ تفاوت معنی داری در وزن و طول بچه ماهیان جنوب شرقی و غربی دریای خزر مشاهده نشد. شاخص چاقی هم تفاوت معنی داری بین دو منطقه نداشت (0/05

Growth and diameter of the pectoral fin spines of artificially reared juvenile Persian sturgeon, Acipenserpersicusin the south Caspian Sea

The growth and microstructure pattern were studied in the pectoral fin spines of artificially reared juvenile Persian sturgeon, Acipenserpersicus in the south Caspian Sea. After biometry, the right pectoral fin spine of the fish specimens were taken and their weight and lengths recorded. No difference in the weight and total length were observed between eastern and western juvenile rearing sites (P>0.05). The condition factor (CF) was also not significantly different between the sites (P>0.05). The relationship between body weight and spine weight was significant at both sites. There was no difference between section diameters of the pectoral fin spines at the eastern and western sites (P>0.05). The relationship between total length and body weight was as asymptotic, so main growth observed in early life cycle. This study revealed similar growth traits of the artificially reared juvenile of Persian sturgeon at the eastern and western sites before they are released to the Sea could be useful to know their conditions for conservation goals.