东海区短尾大眼鲷的食性分析

Food habits of Priacanthus macracanthus in East China Sea region

根据2008年5月～2009年2月“东海区主要渔场重要渔业资源的调查与评估（26°00’-34°00’N、120°00’-126°30’E）”课题调查的渔获样品以及从水产市场所采样品，对东海区短尾大眼鲷胃含物进行分析。结果表明：短尾大眼鲷食物组成以磷虾类为主（IR／=2802．26），其次依次为鱼类（1R／=701．12）、头足类（IR／=488．25）和长尾类（IR／=474．84），其优势饵料种类为太平洋磷虾、细螯虾、乌贼科、短鳄齿鱼等。短尾大眼鲷终年摄食，其摄食率为95．06％，最高饱满指数达110．92％，平均饱满指数18．36％，表明短尾大眼鲷具有较高的摄食强度。

Stomach content of Priacanthus macracanthus collected from East China Sea from May 2008 to February 2009 were studied. The dietary composition of Priacanthus macracanthus were analysed. The results showed that the krill was the dominant food group with an IR/of 2802.26, and the following were fishes （ IRI = 701.12）, cephalopoda （ IRI = 488.25 ） and natantia （ IRI = 474.84 ）. The main species of food constituents were Euphausia pacifica, Leptochela gracilis, Sepiidae gen sp. and Champsodon snyderi. Priacanthus macracanthus feeds all year-ronud. The percentage of full stomach is 95.06%, the max stomach fullness index has reached 110. 92%, and the mean stomach fullness index is 18.36%. The data shows that Priacanthus macracanthus has a strong feeding intensity.