404^◇／200mm底拖网对经济鱼类的损害和改进措施  

Damage of 404◇/200 mm Demersal Trawl to the Commercial Fishes and Countermeasures

作　　者：黄梓荣[1] 

机构地区：[1]中国水产科学院南海水产研究所,广东广州510300

出　　处：《湛江海洋大学学报》2003年第1期41-44,共4页Journal of Zhanjiang Ocean University

基　　金：农业部渔业资源常规监测项目 :我国 2 0 0nmile专属经济区渔业资源调查 (南海区 )

摘　　要：采用 4 0 4 ◇/2 0 0mm底拖网 ,在南海北部进行进行 2 0 0nmile专属经济区渔业资源调查 ,测量其渔获 11种经济鱼类的体长数据 ,统计其没达到最小可捕规格所占比例。结果表明 ,渔获中未达到最小可捕规格的幼鱼比例很大 ,北部湾 ,带鱼、短尾大眼鲷和白姑鱼四季平均未达到最小可捕规格的幼鱼超过 30 % ;海南岛以东 ,花斑蛇鲻、带鱼、短尾大眼鲷、长尾大眼鲷和白姑鱼未达到最小可捕规格的幼鱼超过 30 %。同时提出了改进措施 ,即保留该网型 ,放大网目尺寸或将放大后的囊网网目改为方形网目 ;淘汰该网型 ,改囊网网目为方形网目、网目尺寸符合国家标准的四片式拖网网型。According to the fishery resources survey by 404 ◇/200 mm demersal trawl within 200 n mile EEZ in the north of South China Sea, the body length of 11 commercial fishes was measured, and the ratio of 11 main commercial fishes smaller than minimum catchable size of the South China Sea was calculated. The results showed there was high percentage of the fishes smaller than minimum catchable size in the capture, the capture the average percentage at each species of Trichiurus haumela, priacanthus macracanthus, Argyrosomus argentatus in over than 30% in Beibu Gulf, and the percentage of Saurida undosquamis, Trichiurus haumela, Priacanthus macracanthus, Priacanthus tayenus, Argyrosomus argentatus also over than 30%in the eastern water of Hannan Island. The author gave the countermeasures: reserving the two panels type and using four panels type with a square mesh cod ends and the mesh size according with the national standard.

关 键 词：404^◇/200mm底拖网 经济鱼类 损害 改进措施 方形网目 网目尺寸 渔具 渔业资源 

分 类 号：S972.13[农业科学—捕捞与储运]