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黄鳍金枪鱼是东太平洋金枪鱼围网渔业中的主要渔获种类之一。根据1975-2004年东太平洋(30°N～25°S,75°W～145°W)黄鳍金枪鱼围网生产统计资料和相应年份的Nino3区的指数,利用灰色关联度方法对ENSO现象与黄鳍金枪鱼资源丰度及时空变化的关系进行了分析。研究结果发现,ENSO现象对东太平洋黄鳍金枪鱼围网资源丰度及时空分布有显著影响,在大部分厄尔尼诺年时,黄鳍金枪鱼围网作业重心会向东、向北移;而拉尼娜年则向西移。Nino3指数与单位捕捞努力量渔获量(CPUE)存在负相关关系。此外,黄鳍金枪鱼围网作业重心在年内也呈现出规律性变化,春夏季向西、向北移;秋冬季向东、向南移。春夏季的单位捕捞努力量渔获量高于秋冬季。
Yellowfin tuna is one of the major catch species in the eastern Pacific tuna purse seine fisheries. According to the statistic data of the production of yellowfin tuna purse seine from 30 ° N ~ 25 ° S in the East Pacific (1975-2004) and the index of Nino3 region in the corresponding years, the relationship between ENSO and The relationship between yellowfin tuna abundance and temporal and spatial variation was analyzed. The results show that the ENSO phenomenon has a significant impact on the abundance and temporal-spatial distribution of yellowfin tuna purse seines in the eastern Pacific Ocean. During most El Niño years, the center of gravity of the yellowfin tuna purse seine will move eastwards and northwards, while La Niña Move to the west There is a negative correlation between the Nino3 index and catch per unit effort (CPUE). In addition, the operating center of Yellowfin tuna seine also showed regular changes during the year, moving westward and northward in spring and summer, and moving eastwards and southwards in autumn and winter. Catch effort per catch in spring and summer is higher than in autumn and winter.