东海区底拖网渔业资源变动分析

以2000~2005年底拖网渔业资源的常规监测资料为依据,对东海区底拖网渔获物种类组成、主要经济鱼种单位捕捞努力量渔获量(CPUE)以及生物学特征进行了分析。结果表明,东海区底拖网渔业资源利用结构正在向低值和低营养层次鱼种转化,主要经济鱼种的CPUE不断下降,生物学特征未见明显好转,而渔获物中幼鱼比例不断上升,渔业资源总体状况仍然存在继续衰退趋势。建议降低目前的海洋捕捞努力量,延长伏季休渔时间,加强渔业资源养护和管理力度等。

Analysis on recent status of the bottom trawl fishery resources in the East China Sea region

Based on the data collected from bottom trawl routine surveying in the East China Sea region during 2000-2005,this paper dealed with the analysis on the species composition,Catch Per Unit Effort(CPUE)and biological characters of main commercial species caught in the water area mentioned above.The results indicated that where the resources utilization structure by bottom-trawl fishery has been trending towards the lower valuable and lower trophic level,the CPUE for the main commercial fishes have been decreasing continously,meanwhile the biological characters of the catches have not been any improving,and the percentages of young fishes in the total catches have been uninterruptedly rising.All of those facts indicated that the status of fishery resources has been getting worse in the East China Sea region.Therefore we should strengthen the conservation and management of fishery resources,which would be implemented through reducing the current CPUE and lengthening the current duration of midsummer moratorium in the East China Sea region.