印度洋鲣鱼围网资源渔场时空变化及其与ENSO的关系

发布时间：2018-02-14 20:30

本文关键词： ENSO现象印度洋鲣鱼资源时空变化海表温度海表温度距平　出处：《海洋学报》2017年04期 　论文类型：期刊论文

【摘要】：鲣鱼是印度洋重要的金枪鱼种类之一,其资源丰度与海洋环境关系密切。本研究根据1980-2010年印度洋鲣鱼围网生产统计数据以及海洋环境与厄尔尼诺-南方涛动(ENSO)指数等,对印度洋鲣鱼围网资源渔场时空分布,以及厄尔尼诺年和拉尼娜年等不同尺度气候条件下鲣鱼资源渔场时空变动及其与海洋环境因子的关系进行分析。研究结果表明,1980-2010年印度洋鲣鱼围网渔获量基本保持不断增加的趋势,但CUPE值变化幅度较大,最低仅为0.68t/d(1997年),最高达到1.58t/d(2002年)。同时鲣鱼资源丰度(CPUE)与Ni1o3.4区指数存在显著的负相关关系,即厄尔尼诺年,鲣鱼CPUE随之下降,拉尼娜年,CPUE随之上升。ENSO现象对鲣鱼渔场时空分布也有显著影响,厄尔尼诺发生时,鲣鱼围网作业渔场重心会向东、向北移动,而拉尼娜年则向西、向南移动。
[Abstract]:Skipjack is one of the most important tuna species in the Indian Ocean, and its abundance is closely related to the marine environment. Temporal and spatial distribution of bonito seine resource fisheries in the Indian Ocean, The temporal and spatial variations of skipjack resource fisheries under different climatic scales such as El Nino year and La Nina year and their relationship with marine environmental factors were analyzed. The results showed that the catch of bonito skipjack seine in the Indian Ocean from 1980 to 2010 was basically protected. With a growing trend, However, the change of CUPE value was relatively large, the lowest was 0.68 t / d (1997), the highest was 1.58 t / d (2002). Meanwhile, there was a significant negative correlation between the abundance of bonito fish and the index of Ni1o3.4 region, that is, in El Nino year, the CPUE of skipjack decreased. When El Nino occurs, the center of gravity of bonito seine fishing ground will move eastward and northward, while La Nina year will move west and south.
【作者单位】：上海海洋大学海洋科学学院;上海海洋大学大洋渔业资源可持续开发省部共建教育部重点实验室;上海海洋大学国家远洋渔业工程技术研究中心;
【基金】：海洋局公益性行业专项(20155014) 上海市科技创新计划(15DZ1202200)
【分类号】：S931;P732

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