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根据2011和2012年东南太平洋智利竹鱼(Trachurus murphyi)的渔业生产统计数据,利用广义可加模型(GAM)分析了智利竹鱼资源的时空变动及其与捕捞因子的关系。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24.173%,其中贡献最大的是拖网时间,贡献率为13.758%。东南太平洋智利竹鱼作业渔场主要集中在35.5°~46°S、80°~91°W和25°~28.2°S、74°~76.5°W范围内;最佳捕捞时间为4月、8~11月;最佳拖网时间为8~10 h;最佳的网位为0~40 m;最佳的网口高度为72~95 m。逐步建模法结果显示,影响智利竹鱼CPUE的因子按重要性程度从高到低依次为拖网时间、网位、网口高度、月份、纬度、经度、曳纲长度、网口水平扩张。
Based on the statistics of fishery production of Trachurus murphyi in the southeast Pacific in 2011 and 2012, the spatio-temporal changes of bamboo resources in Chile and their relationship with fishing factors were analyzed by using GAM (Generalized Additive Model). The results showed that the GAM model explained 24.173% of the total deviation of catches per unit of fishing effort (CPUE), and the largest contribution was the trawling time with a contribution rate of 13.758%. The fisheries of bamboo fish in the Southeast Pacific Ocean mainly concentrated in the range of 35.5 ° -46 ° S, 80 ° -91 ° W and 25 ° -28.2 ° S, 74 ° -76.5 ° W; the best fishing time was April, November; the best trawling time is 8 ~ 10 h; the best net position is 0 ~ 40 m; the best net mouth height is 72 ~ 95 m. The results of stepwise modeling showed that the factors influencing the CPUE of bamboo fish in Chile descending order of importance were: trawling time, net position, net height, month, latitude, longitude, dragline length and net mouth level.