东海区海洋渔业资源近况浅析

根据2002～2004年东海区渔业资源监测调查资料、主要捕捞鱼种的生物学资料和中国渔业统计年鉴,对东海区近3 a季节间的资源密度、渔业生物学性状以及历年来的渔获群落结构组成、单位捕捞力量渔获量动态比较,分析东海区海洋渔业资源近况.结果表明:虽然近几年东海区海洋渔业捕捞产量维持在历史高水平,但主要是依赖于超高的捕捞力量、实施伏季休渔制度使群体资源得到暂时的养护等措施.主要经济鱼种的亲鱼量年间变化不大且处于相对缺乏的状态,渔获物小型化、利用资源主体以当龄鱼为主、单位捕捞力量渔获量下降等过度捕捞现象十分明显,资源基础相当脆弱,渔业资源衰退之势仍在加剧.秋季调查资源密度的年间波动取决于补充量水平,其水平的高低与环境因子密切相关.

Analysis on Recent Status of the Fishery Resources in the East China Sea

The paper compared seasonal fishery resources density and biology status in recent three years and composition of fisherion community structure in past years and CPUE, analyzed recent status of fishery resources in the East China Sea based on data of monitoring on fishery resources in the East China Sea from 2002 to 2004 and biology information of main catching fish and the yearbook of fishery in China.The result indicated that the high yield of fishery catching in the East China Sea in recent years mostly depended on high catching power and temporary conservtion on the fishery stock through implementing the closed fishing in summer. Now parent-fish of the main economical species has little annual variety and is in the status existed apparently of comparatively lacking. The overcatching status existed apparently of fishing miniaturization and main utilization the young fish stock and descending of CPUE. The fishery resources foundation is very friability and decaying is boost up. The annual fluctuation of CPUE lies on recruitment in autumn, which has close relation to environment item.