兴凯湖鱼类群落结构变化与渔业资源利用

2012年5月-10月，对兴凯湖鱼类及渔业资源利用状况进行了调查，2012年渔产量约为295t，工作渔船209条，期间共统计渔获物1081kg，生物学测定803尾，经鉴定共有鱼类50种。近年来，兴凯湖生态环境的改变导致鱼类种群结构变化，渔获物个体趋向低龄化、小型化，产量持续下降。本研究整理了历史数据并将其与本次调查结果进行对比，分析渔获物组成特征以及渔产量动态变化特点，找出鱼类群落结构的变化趋势，提出了未来兴凯湖渔业资源可持续利用的建议。

The Variation in Fish Community Structure and Fishery Utilization in Xingkai Lake

Fish community and fishery utilization were investigated by biological measurement of 803 individual fish sampled from 1081 kg in Xingkai Lake during May to October of 2012, with the total catch of about 295 t throughout that year. Fifty fish species were found, and in recent years, fish population structure was changed because of the changing environment in Xingkai Lake, the fishing individuals being characterized by young in age, miniaturization in size and continuous decrease in the fishery production. The composition characteristics and dynamic changes in fishing production were evaluated compared with the investigation data in the past to find out the tendency offish population structure and the proposals of fishery sustainable utilization in Xingkai Lake are discussed.