珠江口虾拖网的副渔获组成

Composition of by-catch of shrimping beam trawl in the Pearl River Estuary,China

拖虾是南海捕捞渔业的一种主要作业方式,南海北部的珠江口是广东省虾拖网的优良渔场之一。文章以珠江口铜鼓水道虾拖网渔业生物调查资料为基础,对该渔业的副渔获组成进行了分析研究。结果表明,珠江口虾拖网渔获种类多,以底栖鱼类和甲壳类为优势类群;副渔获的组成在不同月份有所变化;副渔获比例较高,虾与副渔获之比为1:10-1:19;副渔获中大部分鱼种未达到可捕规格,对幼鱼资源造成损害。建议渔业管理部门重视对副渔获问题的调查研究。

Trawling shrimp is a main operating method of capture fishery off the north of South China Sea. Estuary of Pearl River in the north South China Sea is one of very good shrimp trawl fishing ground in the waters off Guangdong. On the basis of data obtained in the shrimp trawl ecological survey for Tonggu Waterway of Pearl River Estuary, we analyzed composition of by-catch for the fishery in this paper. Results showed that catches of shrimping beam trawl have many species in Estuary of Pearl River in the north South China Sea. The species in catches were dominated by fishes and crustaceans ; Composition of by-catch changed in the different months ; Percentage of by-catch was relatively high, the ratio of shrimp to by-catch is 1：10 - 1：19 ; Most fish species of by-catch were commercially undersized species, with damage to juvenile fish resources. We suggest that fishery administration should emphases on research into the by-catch problem.