东海北部与黄海南部黄鲫群体洄游分布的初步研究

Studies on the seasonal distribution of Setipinna taty in the East China Sea

根据2000年春(4月)、夏(6月)、秋(9月)、冬(12月)四季东海底拖网鱼类资源调查资料,从中选出关于黄鲫的数据,分析了其资源密度的四季空间分布变化,发现在所调查的区域中黄鲫资源可以分成两个群体:一个分布在东海北部水域,另一个分布在东海南部水域。本文主要对分布在北部的这一群体进行了四季空间分布变化的研究,不同大小的黄鲫在各个季节的分布区域有较大的变化,表现出明显的产卵、索饵、越冬等洄游活动行为,并根据研究结果描绘出黄鲫的产卵育卵场、索饵场、越冬场的大致分布位置。

Studies on the seasonal spatial distribution changes of Setipinna taty were conducted, based on the data from bottom trawl surveys in 4 seasons of 2000 in the East China Sea. It was found that Setipinna taty in the survey areas could be separated into two communities. one distributed in the north of East China Sea, the other one in the south of East China Sea. In this paper, studies on the seasonal distribution of Setipinna taty mainly related to the north community. The distribution of Setipinna taty with various body weight varied greatly in different seasons, demonstrating apparent migration behavior, such as spawning, feeding, wintering and so on. In the light of the studies, approximate location of the spawning, feeding and wintering grounds had been depicted for Setipinna taty.