关键词: 柔鱼类, 资源丰度, 海洋环境, 海表温度, 叶绿素a浓度, 海流

Abstract: This paper discussed the gravity change situation of resource center on fishing ground for Ommastrephes bartramii in the North Pacific, Illex argentinus Castellanos  in the Southwest Atlantic and Dosidicus gigas in East Pacific, which made a comprehensive relationship between fisheries and major marine environment factors(sea surface temperature, chlorophyll-a concentration, and ocean current), by collating and analyzing the 3 ocean squids fishing grounds historical production data (2002-2014) in combination with the marine environment data at the same period, and using the production center of gravity method and generalized additive model (GAM). The results showed that the optimal sea surface temperature(SST ) range of the North Pacific fishery was 15~20℃, the optimal chlorophyll-a concentration range was 0.20~0.60 mg/m3; the optimal SST range of fishing ground for Illex argentinus  Castellanos in the Southwest Atlantic was 9~14℃, the optimal chlorophyll-a concentration range was 0.60~1.65 mg/m3; the optimal SST range of fishing ground for Dosidicus gigas in East Pacific was 18~23℃, the optimal chlorophyll-a concentration range was 0.16~0.40 mg/m3. GAM test results showed that SST had a significant correlation to resource abundance and was a key indicator to the central fishing grounds. Generally fisheries position appeared at the intersection of different ocean current rip. This study sugessted that the production efficiency could be improved by adjusting fisheries center of gravity and improving production efficiency, according to sea state information of times change in fishery.

Key words: squids, resource abundance, marine environment, sea surface temperature, chlorophyll-a concentration, ocean current