北部湾主要鱼类食性的初步研究
Preliminary study on the feeding habit of dominant fish species in Beibu Gulf
Abstract
鱼类的食性研究是探索海洋生态系统结构与功能的基础,通过多种海洋鱼类食性的综合分析可以了解食物网营养级的能流途径,从而为渔业管理提供研究参考。本文根据2012年夏季(7月)在北部湾采集的鱼类样品,对鱼类的饵料组成及其食性、饵料组成随鱼体生长发育的变化情况、鱼类胃含物饵料组成与水体环境饵料生物的相关关系、鱼种之间的饵料竞争和鱼类营养级进行研究,并初步探讨北部湾鱼类营养级的年际波动。主要结果如下: 19种主要鱼类309个胃含物样品的饵料组成分析结果表明,蓝圆鲹胃含物中饵料类群数为13类,竹荚鱼4类、发光鲷7类、六指多指马[鱼友]14类、二长棘犁齿鲷2类、刺鲳8类、日本绯鲤7类、银姑鱼4类、多齿蛇鲻... Fish feeding habit analysis is fundamental for studying the structure and function of marine ecosystem, which provides an elemental assement for conducting fishery management. In this study, diet composition and feeding preference, changes of diet composition in different development stages, relationship between gut content and in situ species composition, food competition among different fish spe...