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根据2009年6～11月金枪鱼延绳钓观察员海上采集的数据,对中西太平洋S2°05′～S7°51′,W159°48′～W168°10′海域的延绳钓渔获物组成进行了分析。126个站点(钩次)的种类组成分析表明,该作业区域的渔获物有鱼类35种,隶属于9目22科30属;鲸类2种,隶属于1目2科2属;龟鳖类1种。反映种类组成多样性的Shannon-wiener指数H′、Simpson优势度指数λ、平均分类差异指数△~+、分类差异变异指数∧~+、Margalef丰富度指数D′和Pielou均匀度指数J′分别为1.716、0.749、70.4、237、2.388和0.911。种类组成的多样性指数无明显的月际变化,低纬度(0°S～5°S)和高纬度(5°S～10°S)之间也不存在显著性差异,而站点(钩次)间的多样性指数存在显著差异。
According to the data collected by observers of tuna longline from June to November in 2009, the catch of longline fish in the waters of S2 ° 05 ’~ S7 ° 51’ and W159 ° 48 ’~ W168 ° 10’ in the Western and Central Pacific Ocean analysis. Species composition analysis of 126 sites (Hooks) showed that there were 35 species of fish caught in the work area, belonging to 9 orders, 22 families and 30 genera, and 2 species of whales belonging to 1 order, 2 families, 2 genera and tortoises 1 species of turtle. Shannon-wiener index H ’, Simpson dominance index λ, mean taxonomic difference index △ ~ +, taxonomic difference mutation index ∧ ~ +, Margalef richness index D’ and Pielou evenness index J ’were 1.749, 0.724, 237, 2.388 and 0.911. There was no significant monthly variation in the diversity indices of species composition. There was also no significant difference between low latitudes (0 ° S ~ 5 ° S) and high latitudes (5 ° S ~ 10 ° S) ) Between the diversity index there are significant differences.