南黄海、东海鲐鲹鱼索饵场浮游动物生态特征

Ecological characteristics of zooplankton in feeding ground of mackerel and scads from Southern Yellow Sea and East China Sea.

本文采用比较的方法,研究了黄海南部东海北部和东海中南部两个鲐鲹鱼索饵场浮游动物生态特征。结果表明,南部渔场生物量的极差、变异系数小于北部渔场。若扣除个别站位的影响,则南部渔场的平均值高于北部渔场。北部渔场群落多样度、均匀度、丰富度、单纯度较高,南部渔场则相反。北部渔场浮游动物优势种较少,且大多数种具有较高的聚集强度;而南部渔场优势种较多,优势度低,聚集性差。

In this paper, the ecological characteristics of zooplankton in feeding grounds of mackerel and scads from Southern Yellow Sea and East China Sea were studied by comparing methods. It showed that the extreme difference and variation coefficient of zooplankton biomass in southern foeding ground were less than those in northern feeding ground. The average value was higher in southern than in northern feeding ground, if the influence of biomass in a few stations could be negleoted. In northern feeding ground, community indices as diversity, homogeneity, abundance and simplicity were higher, and in southern feeding ground, they are to the contrary. The number of dominant species of zooplankton was less in northern than in southern feeding ground, but most of dominant species had higher aggregated intensity. On the contrary, the dominant degree in southern feeding ground was lower, and association density was also lower.