【作者】 张旭丰； 张鹏； 杨吝； 谭永光；

【Author】 ZHANG Xu-feng,ZHANG Peng,TAN Yong-guang,YANG Lin (South China Sea Fisheries Research Institute,Chinese Academy Fishery Sciences,Guangzhou 510300,China)

【机构】 中国水产科学研究院南海水产研究所；

【摘要】 根据2005年渔业资源监测船生产调查资料和现场取样数据,运用数理统计方法分析了虾拖网副渔获组成及其月份变化等。结果表明:硇洲岛周围水域虾拖网副渔获种类多,主要为沿岸性底栖种类,组成结构存在明显的月份变化,其中蟹类和鱼类是影响副渔获组成结构和月份变化的优势类群;副渔获海上抛弃率很低,兼捕现象严重是现阶段虾拖网的主要问题,副渔获与目标虾类的平均重量比为6.8:1,平均产值比为2.5:1。为合理利用渔业资源和促进虾渔业可持续发展,应根据鱼、虾、蟹等的生活习性和行动差异开发适宜广东沿海虾拖网的选择性捕捞技术,减少副渔获兼捕量。更多还原

【Abstract】 Based on production investigation and sampling data by fishing vessel in 2005, composition and monthly variation of by-catch were analysed with data analysis tool of Microsoft Excel.The results indicated that by-catch of shrimp beam trawl in waters surrounding Naozhou Island had many species and consisted of coastal and epibenthile species and among them,fishes and crabs are dominate species of shrimp trawl fishery.Monthly variation in composition of by-catch was very obvious.At present,relatively high percentage of by-catch is main problems of shrimp trawl fishery relative to very less by-catch discards,the average ratio of by-catch to shrimp is 6.83:1 in weight and 2.5:1 in value respectively.To exploit rationally fishery resources and to promote sustainable shrimp fishery development,a great number of by-catch should be reduced and released largely with using trawl separating devices and techniques based on behavior and characteristics of shrimp,fish and card et al.更多还原