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根据中西太平洋1984~2003年金枪鱼围网渔业的渔获量统计资料,利用G IS定性分析方法和数值分析方法对中西太平洋海区的金枪鱼围网渔场的时空变动进行研究。研究结果表明:1984年到1991年,CPUE值在12.0~17.3 t/(d.n)之间;1992年至2003年,CPUE值在19.1~27.9 t/(d.n)之间,两个阶段的CPUE差异显著;Ⅰ、Ⅱ和Ⅲ类渔场基本上全部分布在5°S~5°N、140°E~180°之间,但Ⅲ类渔场在南半球略往东延伸,在10~5°S、155°~160°E之间也有分布;Ⅳ、Ⅴ类渔场则分布在Ⅰ、Ⅱ和Ⅲ类渔场的周边,其中Ⅳ类渔场主要位于东经地区,Ⅴ类渔场主要位于西经地区。
Based on the statistics of seine tuna seine fisheries in Central and Western Pacific from 1984 to 2003, the spatial and temporal variations of seine tuna purse seine fisheries in the Western and Central Pacific Ocean were studied by means of G IS qualitative analysis and numerical analysis. The results show that from 1984 to 1991, the CPUE value ranged from 12.0 to 17.3 t / (dn). From 1992 to 2003, the CPUE value ranged from 19.1 to 27.9 t / (dn). The differences in CPUE between the two stages (P <0.05). However, the type Ⅰ, Ⅱ and Ⅲ fisheries basically all distributed between 5 ° S ~ 5 ° N and 140 ° E ~ 180 °. However, the type Ⅲ fisheries extended eastward in the southern hemisphere. At 10 ~ 5 ° S, 155 There are also distributions between ° and 160 ° E. Type IV and Ⅴ fisheries are distributed around Type I, II and III fisheries. Type IV fisheries are mainly located in the east longitude and Type Ⅴ fisheries are mainly located in the Western Regions.