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应用生态学报 ›› 2003, Vol. ›› Issue (10): 1697-1700.

• 研究论文 • 上一篇    下一篇

拖网捕捞对东海渔业资源种群结构的影响

樊伟1,2, 周甦芳1, 崔雪森1, 程炎宏1   

  1. 1. 中国水产科学研究院东海水产研究所农业部海洋与河口渔业重点开放实验室, 上海 200090;
    2. 华东师范大学河口海岸国家重点实验室, 上海 200062
  • 收稿日期:2001-11-09 修回日期:2002-03-15 出版日期:2003-10-15
  • 通讯作者: 樊伟,男,1971年生,助理研究员,在读博士,主要从事海洋渔业生态环境、渔业遥感与GIS研究,发表论文5篇.E-mail:fan-wee@sohu.com.
  • 基金资助:
    国家“863”计划资助项目(863-818-07-03)

Impact of trawl fishing on fisheries population components in East China Sea

FAN Wei1,2, ZHOU Sufang1, GUI Xuesen1, CHENG Yanhong1   

  1. 1. Key Laboratory of Marine and Estuarine Fisheries, Ministry of Agriculture East China Sea Fisheries Research Institute, Shanghai 200090, China;
    2. State Key Laboratory of Estuary and Coastal, East China Normal University, Shanghai 200062, China
  • Received:2001-11-09 Revised:2002-03-15 Online:2003-10-15

摘要: 利用收集到的近50年东海主要渔业企业和近7年来主要地区的拖网捕捞分品种渔获量数据,研究计算了双船拖网和单船网板拖网的渔获物食性指数与品种组成指数.结果表明,1974年前东海鱼类食性指数不断增大,之后开始迅速减小,呈现先升后降趋势.品种组成指数渔获物对数均值从20世纪70年代后期开始不断下降,标准差则缓慢增大.近7年单拖网渔获物的计算结果也表现出鱼类食性指数的下降趋势.长期拖网过度捕捞是造成东海海洋生态系中渔业资源种群结构变化的重要原因,渔业资源已经过度开发,种群结构稳定性减弱.

Abstract: Based on the recent 50 years two-boats trawl fishing data of some state-owned fisheries companies and recent 7 years single-boat fishing data of some areas in East China Sea, the trophic index (TI) and composition indexs of fishes of two-boats trawl and single-boat trawl were calculated and analyzed, which indicated that TIincreased before 1974 and decreased rapidly thereafter, while composition index decreased from the end of 1970s, but SD increased.The results of single-boat trawl also indicated that TIdecreased gradually.Long-term over-fishing of trawl was one of the main reasons of the change of fisheries population structure in East China Sea.All of these showed that there was an over-fishing in East China Sea, and the robust of fisheries population was lower.

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