Regional, interannual and size-related variation of age 0 year walleye pollock whole body energy content around the Pribilof Islands, Bering Sea

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• 作者：Ciannelli ; L. ; Paul ; A. J. ; Brodeur ; R. D.
• 刊名：Journal of Fish Biology
• 出版年：2002
• 出版时间：May, 2002
• 年：2002
• 卷：60
• 期：5
• 页码：1267-1279
• 全文大小：175 K

文摘

Mean whole energy content (E_wb) of age 0 year walleye pollock Theragra chalcogramma was 19·928KJ g⁻¹ dry mass in 3943 fish collected from different habitats around the Pribilof Islands frontal structure, south-east Bering Sea, during September 1994–1996 and 1999. It varied, however, with habitat type. Fish residing offshore had higher E_wb than fish residing inshore of the frontal regions. Age 0 year walleye pollock E_wb changed in a non-linear fashion with fish size, with larger juveniles typically having higher E_wb. Size thresholds were identified at which the relationship between age 0 year walleye pollock E_wb and L_S changed. One such threshold was found at 46mm where E_wb reached a local minimum. Another threshold was found at 80mm beyond which E_wb tended to remain constant with size. Overall mass-length and E_wb-length residuals were highly correlated with each other (r