2014年秋季舟山渔场帆张网渔获组成结构及多样性分析

2014年舟山市1-8月份帆张网作业捕捞产量占捕捞总产量的40.35%,帆张网作业仍然是目前东海区海洋捕捞的主要生产作业方式之一。依据2014年秋季帆张网渔船渔获物调查统计数据,分析了渔获物种类结构组成和多样性特征。本次调查帆张网渔获物共30种,其中鱼类18种,虾类7种,蟹类5种,其中带鱼、小黄鱼、银鲳、虾蟹类分别占捕捞总产量的47.83%、24.78%、2.42%、19.44%,其他鱼类品种较多,总共占5.53%,在随机抽取的4 409个样品中,鱼类质量占总质量的91.12%,虾类占1.37%,蟹类占7.52%。经过计算分析,调查海域物种多样性指数较高,物种较为丰富,但是从带鱼和小黄鱼幼鱼所占比例来看,帆张网作业对幼鱼资源仍有较为严重的破坏。

Fall Zhoushan Fishing Stow Net Catch Composition and Diversity Analysis

September 2014 Zhoushan total domestic production of stow net in the sail in nine kinds of practices accounted for 37.55%, accounting for 20.28 % in October in eight kinds of operation mode, we can see that the ocean stow net is currently in the East China production of one of the main fishing practices. Based on 2014 autumn stow net catch survey data, analyzed the structure and diversity of species catch characteristics. The survey stow net catches 18 kinds of fish, seven kinds of shrimp, crab five kinds, including octopus, small fish, silver pomfret, shrimp and crab fishing accounted for 47.83% of total output, respectively, 24.78%, 2.42%, 19.44% other fish varieties, accounting for 5.53% in total, in 4418 randomly selected sample, the fish of 91.49% of the total of the mass, accounting for 1.31 percent of shrimp, crabs accounted for 7.20%. After calculation and analysis, survey the waters high species diversity, species are more abundant, but from the octopus and small yellow croaker proportion of juveniles, the stow net job destruction for juveniles resources still more serious damage, improve stow net minimum mesh size without delay.