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基于2000～2007年中西太平洋金枪鱼围网生产统计数据及遥感手段获取的海表温度、海面高度、叶绿素浓度等环境数据,利用广义可加模型(GAM)分析了中西太平洋鲣鱼渔场分布及其与时空和环境因子的关系。结果表明:GAM模型对单位捕捞努力量渔获量(CPUE)总偏差解释率为64.40%,其中贡献最大的为经度,贡献率为46.27%。鲣鱼的CPUE呈逐年递增状态;作业渔场全年均有分布,但季节性差异并不明显,其中4月为作业集中月份;鲣鱼作业渔场主要分布在10°S～10°N,140°～175°E范围内;适宜海表温度为28～30℃;适宜的海表面高度为70～100 cm;适宜的叶绿素浓度为0.01～0.20mg/m3。影响渔场的因子按重要性从大到小依次为:经度,纬度,年份,海面高度,海表温度,叶绿素浓度和月份。
Based on the statistics of tuna purse seine production in the Central and Western Pacific Ocean from 2000 to 2007 and the sea surface temperature, sea surface height and chlorophyll concentration acquired by remote sensing, the distribution of the catfish fishery in the Western and Central Pacific Ocean was analyzed by GAM (Generalized Additive Model) The relationship between space and time and environmental factors. The results showed that the GAM model explained 64.0% of the total deviation of catches per unit of fishing effort (CPUE), of which the longitude was the largest contributor and the contribution rate was 46.27%. The CPUE of mullet increased year by year. The operating fishing ground was distributed throughout the year, but the seasonal difference was not obvious. April was the month of concentrate operation. The fishing ground of anchovy mainly distributed in 10 ° S ~ 10 ° N and 140 ° ~ 175 ° E, suitable sea surface temperature is 28-30 ° C, suitable sea surface height is 70-100 cm, and suitable chlorophyll concentration is 0.01-0.20 mg / m3. Factors influencing the fisheries, in descending order of importance, are: longitude, latitude, year, sea surface height, sea surface temperature, chlorophyll concentration and month.