安徽农业科学2009，Vol.37Issue(20)：9510-9513,4.
长江河口定置张网渔获物组成及其多样性分析
Catch Composition and Diversity Analysis of Set Net in Yangtze Estuary
摘要
Abstract
Based on the catch data of set net in Yangtze estuary during 1999-2007, the paper analyzed the catch composition and diversity. 1 060 488 fish individuals were collected, representing 32 species which belonged to 28 genera, 22 families and 11 orders. The most of fish species attributed to Sciaenidae. The density index CPUE decreased year by year.Coilia mystus, Collichthys lucidus, Harpodon nehereus were dominant species. The size of fish become smaller, younger, and the community structure tended to be simple according to investigate results. The marine fishes were the dominated species among the catch, and the number of migratory fishes were scare. Average characters of diversity showed that Margalef's index was 1.283 6, Shannon's index was 1.053 2, Pielou's index was 0.409 1, Simpson's index was 0.471 6. Margalef's index, Shannon's index, Pielou's index were declining, but Simpson's index was increased during the past nine years. The paper also discussed the factors which caused the decline of the fish species diversity.关键词
长江口/定置张网/鱼类组成/资源密度CPUE/多样性Key words
Yangtze Estuary/ Set net/ Fish composition/ Resource density index CPUE/ Diversity分类
农业科技引用本文复制引用
郑颖,戴小杰,朱江峰..长江河口定置张网渔获物组成及其多样性分析[J].安徽农业科学,2009,37(20):9510-9513,4.基金项目
上海近海海洋综合调查与评价(上海市"908"专项PJ-2 （）
HD3). （）
