【作者】 单秀娟； 线薇薇；

【Author】 Xiujuan Shan a,b Weiwei Xian a a key laboratory of ecology and environmental sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao, 266071,P.R.China b Key laboratory for sustainable utilization of marine fisheries resource,Yellow Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences Qingdao,266071,P.R.China

【机构】 中国科学院海洋研究所海洋生态与环境重点实验室； 中国水产科学院黄海水产研究所海洋渔业资源可持续利用重点开放实验室；

【摘要】 本文对三峡工程蓄水后长江口鱼类浮游生物群落结构的季节变化进行了研究。蓄水后鱼类浮游生物种类组成简单,主要是暖温性和暖水性小型种类,数量也比蓄水前减少,分布也不均匀。在调查中鳀鱼在夏季占优势,秋季康氏小公鱼在出现频率、数量和优势度上开始超过鳀鱼。并且蓄水后一些经济种类如黄姑鱼等开始逐渐变少,银鲳已经消失,而一些种类如红狼牙(?)虎鱼、方氏云鳚、青带小公鱼等在蓄水后出现。三峡工程蓄水后经济价值低、个体小、年龄结构简单和营养层次低的类群在长江口及其邻近海域占据优势地位,鱼类浮游生物群落结构也产生了很大的变化,因此改善长江口及其邻近海域的环境,制定合理的保护政策及措施是保持长江口鱼类资源的可持续发展的必要条件。更多还原

【Abstract】 Changes in ichthyoplankton community structure in the Yangtze River Estuary and adjacent sea areas were examined based on data collected from large-scale zooplankton trawls in February,May,August and November 2004.The results showed that changes in community structure,including dominant species and diversity,had occurred in the Yangtze River Estuary and adjacent sea areas.Species composition were simple,mainly were warm temperature and warm water species;and species diversity showed a decreasing trend.Some species with lower economic value,smaller individual and lower tropic level were absolutely predominant positions in the Yangtze River Estuary and adjacent sea areas,which might play important roles in reduction of fishery in this sea area.更多还原