Abundance and distribution of jumbo flying squid (Dosidicus gigas) are evidently influenced by the changes of marine environment. In this study, the maximum entropy (MaxEnt) model was applied to examine the impacts of marine environmental va- riables on its potential distribution, and identified habitat hotspots of D. gigas in summer and autumn along the coast of Chile. The MaxEnt model was constructed by using the fisheries data of D. gigas from summer to autumn during 2011 – 2017 combined with cri- tical environmental factors including mixed layer depth (MLD), sea surface salinity (SSS), sea surface height (SSH) and water tem- perature at depths of 0 m, 25 m, 50 m, 100 m, 150 m, 200 m, 300 m, 400 m and 500 m. Results showed that the actual fishing efforts of D. gigas in summer and autumn were mostly distributed in the suitable habitat, indicating that the MaxEnt model can well predict the habitat hotspots of D. gigas off Chile. The key environmental factors and their suitable ranges for D. gigas showed significant inter- monthly changes from December to May. The critical environmental factors of D. gigas off Chile were MLD, SSH, water tempera-ture at different depths in summer (Temp_25 m in December, Temp_300 m in January and Temp_400 m in February) and SSH, SSS, Temp_400 m in autumn. Our findings suggest that selecting the key environmental factors is vital to study the potential distribution of D. gigas off Chile in each month to explore its habitat hotspots.

YU Wei;FENG Zhiping;LI Nan;CHEN Bingjian;CHEN Xinjun

Shandong Marine Resources and Environment Research Institute,Yantai 264006,China;College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;National Engineering Research Center for Oceanic Fisheries,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai Ocean University,Shanghai 201306,China;National Ocean Satellite Shandong Data Application Center,Yantai 264006,China

中国海洋大学学报（自然科学英文版）

[1]YU Wei;FENG Zhiping;LI Nan;CHEN Bingjian;CHEN Xinjun-.Identifying Summer/Autumn Habitat Hotspots of Jumbo Flying Squid (Dosidicus gigas) off Chile)[J].中国海洋大学学报（自然科学英文版）,2022(06):1669-1681

Hotspots,jumbo,riables

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