南海北部底拖网渔业资源的数量变动

利用1961～1999年期间南海水产研究所5次渔业资源调查的底拖网渔获率数据,分析了南海北部底拖网渔业资源的数量变动。结果表明,20世纪60年代初至90年代末的30多年间,南海北部大陆架和北部湾底拖网渔获密度的下降非常显著,分别下降72%和81%,其中北部大陆架沿岸、近海和外海分别下降71%、74%和70%。南海北部海域底拖网渔业资源均处于过度开发状态,沿岸和近海过度开发较严重,外海过度开发的强度相对较轻。

Changes of demersal trawl fishery resources in northern South China Sea as revealed by demersal trawling

Based on otter trawl catch rates of five surveys conducted by South China Sea Fisheries Research Institute from 1961 to 1999,changes in demersal trawling fishery resources in the northern South China Sea were analyzed.The results indicated that,in over 30 years from early 1960s to late 1990s,the trawl catch rates have declined noticeably by 72% and 81% separately in the northern shelf and Beibu Gulf of the South China Sea.The catch rates have dropped by 71%,74% and 70% respectively in the inshore,offshore,and outer shelf of the northern shelf.The demersal fishery resources in all areas of the northern South China Sea have been over-exploited,and more severe overfishing occurred in the inshore and offshore waters than in the outer shelf.