渔业现代化Issue(4)：56-61,6.DOI:10.3969/j.issn.1007-9580.2015.04.013
基于 GAM 的阿根廷滑柔鱼 CPUE 与环境因子关系分析
Study on the relationship between Illex argentinus CPUE and environmental factors based on GAM
摘要
Abstract
Based on the capture data of Argentina offshore in summer and autumn of 2013 , combined with the data of environment including date, space, SST, water depth, flow velocity, etc, we established generalized additive models ( GAM) with Illex argentinus catches per unit fishing effort ( CPUE) , temporal spatial factors and environmental factors to study the relationship among them. The results showed that GAM of the accumulation explained for CPUE was 56.10%, there were four factors affecting on the CPUE greatly, which were operation date, SST, depth and flow velocity.According to the Akaike information criterion ( AIC ) guidelines, the optimal model included these four significant variables, its PCf ( pseudo coefficient) value was 0.487, and AIC value was 660.688, which indicated that the model has a better fitness. Among environmental factors, the relationship between depth and the CPUE of studied area was most closely, the appropriate depth of Illex argentinus fishing grounds was 250-500 meters, suitable SST ranged from 8-14 ℃, and the optimum SST was 12-14 ℃.Stepped GAM model analysis showed that influencing factors of CPUE was date, depth, SST and flow velocity according to their importance.关键词
阿根廷滑柔鱼/西南大西洋/广义加性模型( GAM)/资源评估Key words
Illex argentines/summer and autumn/GAM/Southwest Atlantic Ocean分类
农业科技引用本文复制引用
李德伟,张龙,王洋,朱文斌..基于 GAM 的阿根廷滑柔鱼 CPUE 与环境因子关系分析[J].渔业现代化,2015,(4):56-61,6.基金项目
2013年西南大西洋滑柔鱼资源探捕项目 （）
