中西太平洋鲣鱼时空分布及其与ENSO关系探讨

Spatial and Temporal Distribution of Skipjack and Relationship with ENSO in the West-central Pacific Ocean

根据1990-2001年中西太平洋海域(20°N^25°S,175°W以西)金枪鱼围网作业产量和作业次数,结合海水表面温度SST、3.4区SSTA等海洋环境数据,对鲣鱼产量时空分布及其与厄尔尼诺-南方涛动指数(ENSO)关系进行分析。研究表明,鲣鱼主要产量分布在表温28~30℃,尤以29~30℃为主,其结果经K-S检验;主要作业渔场分布在E140~175°海域,各年作业重心有所不同,与ENSO关系密切。以年为单位进行时间序列分析,发现高产区经度重心、平均经度较ENSO指标有一年的滞后。

The spatial-temporal distribution of skipjack and relationship with ENSO（El Nino oscillation） was evaluated in the west-central Pacific Ocean（WCPO） as one of the most important fishing area in the world tuna purse seine fishery based on the catch data and fishing times of the tuna purse seine in the WCPO（20°N～25°S,120°E～185°E）,and the environment data of sea surface temperature（SST） and Nino 3.4 area SSTA.The results showed that the catch was mainly located in the waters with SST ranging from 28 ℃ to 30 ℃,especially at 29～30 ℃,by a K-S test.The main fishing ground was distributed in the longitude range from E 140°～175°.For different years,the focus fishing area was variable,closely related with ENSO.It was found that there was 1 year time lag with ENSO index in one year as unit in the main center in the longitude and average longitude.