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根据2001—2007年我国渔船在东南太平洋海域的智利竹筴鱼生产统计数据、时空因子以及海表温度、叶绿素浓度、海表温度梯度等环境数据,利用广义可加模型(GAM)分析了智利竹筴鱼资源变动情况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(catch per unit effort,CPUE)总偏差解释率为31.47%;竹筴鱼生产具有明显的季节变化,主要集中在第17～41周,其中第25～31周的CPUE较高;东南太平洋智利竹筴鱼作业渔场集中在78°—98°W,30°—43.5°S之间,适宜海表温度为12℃～18℃,14℃～16℃最适宜,适宜叶绿素浓度在0.09～0.18mg·m-3,海表温度梯度在0.3℃～1.9℃.逐步建模法结果表明,影响竹筴鱼资源丰度的因子按重要性从大到小依次为周次、年份、海表温度、经度、纬度、叶绿素浓度和海表温度梯度.
Based on the statistical data of the production of Chilean mackerel, the spatio-temporal factors, sea surface temperature, chlorophyll concentration and sea surface temperature gradient of Chinese fishing boats in Southeast Pacific from 2001 to 2007, the generalized additive model (GAM) The results showed that the interpretation rate of total deviation of catch per unit effort (CPUE) of GAM model was 31.47%, and the production of mackerel fish had obvious The seasonal variations of the fish species mainly concentrated in the 17th to 41st weeks, with the highest CPUE in the 25th to 31st weeks. The fishing grounds of Chilean anchovy in the southeast Pacific were concentrated between 78 ° -98 ° W and 30 ° -43.5 ° S, The suitable sea surface temperature is 12 ℃ ~ 18 ℃, and the optimum temperature is 14 ℃ ~ 16 ℃, the suitable concentration of chlorophyll is 0.09 ~ 0.18mg · m-3 and the sea surface temperature gradient is 0.3 ℃ ~ 1.9 ℃. The stepwise modeling results show that, Factors influencing the abundance of the mackerel fish are the weekly, year, sea surface temperature, longitude, latitude, chlorophyll concentration and sea surface temperature gradient in descending order of importance.