Construction of habitat suitability index model for Argentine shorfin squid Illex argentinus based on vertical water temperature at different depths
LIU Hewei, YU Wei, CHEN Xinjun, ZHU Wenbin
1.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China; 2.National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China; 3.Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China; 4.Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China; 5.Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, China
Abstract: In order to explore the effects of sea water temperature at different depths on the fishing ground of Argentine shortfin squid Illexargentinus with short-lived life cycle strongly affected by water temperature in the Southwest Atlantic Ocean, the habitat suitability index (HSI) was established based on the sea water temperature at depth of 50, 100 and 200 m due to the spatio-temporal distribution of the Argentine shortfin squid habitat closely related to the water temperature at different depths in the ocean. In this study, the suitability index (SI) at different water depths in each month was evaluated by fishing effort,and 10 various cases were set up to establish an integrated HSI model based on the fisheries data and environmental data including sea water temperature at depth of 50, 100 and 200 m from January to April from 2013 to 2017. The area correspond was defined as the unsuitable habitat at HSI≤0.2, common habitat at 0.2<HSI<0.6, and suitable habitat at HSI≥0.6 for Argentine shortfin squid. The optimal case was selected by calculating and comparing with the proportion of catch, effort and catch per unit effort (CPUE). The results showed that the optimal weight ratio of SI was found to be 0.1∶0.1∶0.8 at temperature at depth of 50 , 100, and 200 m, with the maximal weight ratio of SI at 200 m. This model yielded the best performance and accurately predicted the fishing ground of Argentine shortfin squid. Bring the fishery data and environmental data in 2017 into the comprehensive HSI model based on the optimal weighting scheme, the prediction accuracy was more than 50% based on catch and effort from January to April. Furthermore, the prediction accuracy was more than 90% in February and April. The findings indicated that the integrated HSI model based on sea water temperature at different depths predicted the distribution of Argentine shortfin squid commendably, and that the water temperature at 200 m was considered as the most important factor affecting spatial distribution of Argentine shortfin squid habitat in the Southwest Atlantic Ocean.
刘赫威, 余为, 陈新军, 朱文斌. 基于不同水层海水温度的阿根廷滑柔鱼栖息地模型构建[J]. 大连海洋大学学报, 2021, 36(6): 1035-1043.
LIU Hewei, YU Wei, CHEN Xinjun, ZHU Wenbin. Construction of habitat suitability index model for Argentine shorfin squid Illex argentinus based on vertical water temperature at different depths. Journal of Dalian Ocean University, 2021, 36(6): 1035-1043.
2021, Vol. 36 
