硇洲岛周围水域虾拖网虾渔获组成

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虾渔获组成、生物学特征以及月份变化等。结果表明:硇洲岛周围水域虾拖网捕获的虾类主要是沿岸性底栖虾类,渔获中优质虾种少,幼虾比例高,墨吉明对虾、日本囊对虾、哈氏仿对虾是虾拖网渔业的主捕虾种,虾渔获组成存在明显的月份变化。为合理利用虾类资源和促进虾渔业可持续发展,应根据虾类特性开发适宜广东沿海虾拖网的选择性捕捞技术,减少幼虾兼捕量。

Composition of shrimp catches caught shrimp by beam trawl in the waters around Naozhou Island of Guangdong Province

Based on monitoring investigation and sampling data by fishing vessel in 2005,composition,biological characteristics and monthly variation of shrimp catches have been analysed with data analysis tool of Microsoft Excel.The results indicated that shrimp catches caught shrimp by beam trawl in waters around Naozhou Island were consisted of coastal and epibenthile species and less commercial species,among them,Penaeus merguiensis,Penaeus japonicus,Parapenaeopsis hardwickii were the target species of shrimp trawl fishery.Monthly variation in composition of shrimp catches was obvious.The selectivity of shrimp beam trawl for small and young shrimps is poor.To exploit rationally the shrimp resources and to promote sustainable shrimp fishery development,a great number of small and young shrimps caught by shrimp beam trawl should be reduced and released largely with using trawl separating devices and techniques based on shrimp behavior and characteristics.