海表面温度变化下秘鲁外海茎柔鱼栖息地的时空变动  

Spatial and Temporal Variations of Potential Habitats of Jumbo Flying Squid Dosidicus gigas off Peru under Increasing Sea Surface Temperature

作　　者：刘杉 张子健 吴佳怿 余为[1,2,3,4] LIU Shan;ZHANG Zijian;WU Jiayi;YU Wei(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;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)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]国家远洋渔业工程技术研究中心,上海201306 [3]大洋渔业资源可持续开发教育部重点实验室,上海201306 [4]农业农村部大洋渔业开发重点实验室,农业农村部大洋渔业资源环境科学观测实验站,上海201306

出　　处：《水产科学》2022年第4期636-644,共9页Fisheries Science

基　　金：国家重点研发计划项目(2019YFD0901405);国家自然科学基金青年科学基金资助项目(41906073);上海市自然科学基金资助项目(19ZR1423000).

摘　　要：茎柔鱼广泛分布于秘鲁海域,在海洋生态系统中具有重要地位且经济价值极高,其资源丰度和栖息地分布与气候和海洋环境变化紧密关联。基于中国鱿钓渔船在东南太平洋秘鲁海域的作业数据,利用栖息地模型探索秘鲁海域海表面温度分别上升0.5、1.0、2.0℃和4.0℃情境时茎柔鱼适宜栖息地的变动规律,科学评价海域海表面温度升高对茎柔鱼栖息地时空变动的影响。研究结果显示,栖息地适宜性指数模型能够预测茎柔鱼栖息地的时空分布。当海域海表面温度上升时,9—12月茎柔鱼适宜(栖息地适宜性指数≥0.6)和最优(栖息地适宜性指数≥0.8)栖息地面积呈现下降趋势,栖息地经度和纬度重心分别向东部和南部海域转移。当海域海表面温度由升高0.5℃至升高4℃变化时,栖息地适宜性指数均值自西向东逐渐升高,自北向南逐渐升高。研究表明,秘鲁外海海域海表面温度上升0.5、1.0、2.0℃和4.0℃情境时,茎柔鱼适宜栖息地面积总体表现为下降趋势,且向东南方向移动。未来开发和利用秘鲁外海茎柔鱼资源时,需考虑海域海表面温度变化带来的影响。Jumbo flying squid Dosidicus gigas is widely distributed in the southeast Pacific Ocean off Peru,and has highly ecological and economical importance.At present,jumbo flying squid has been largely exploited by international squid-jigging fishing vessels.Jumbo flying squid has only one-or two-year lifespan,and both its abundance and spatial distribution are closely related to large-scale climatic and regional environmental conditions at different spatio-temporal scales.Understanding of the relationship between the jumbo flying squid stock and climate variability is very important for better fisheries management and accurate fishing forecasts.It will help fishermen to effectively look for productive fishing grounds,increase the catch and improve the economic values.Based on the fishery data obtained from the Chinese squid-jigging fishery,combined with the critical environmental factor(sea surface temperature,SST),variations in the habitat suitability of D.gigas off Peru were evaluated,and further assessment of the impacts of ocean waming-induced SST increases on spatio-temporal distribution of potential habitats were investigated under the SST in recent years(2011—2015)and with 0.5℃,1.0℃,2.0℃and 4.0℃increases.The results showed that the habitat suitability index model accurately predicted the spatial and temporal habitat of jumbo flying squid.With the SST increase,the areas of suitable(HSI≥0.6)and the most favorable habitats(HSI≥0.8)for jumbo flying squid showed a decreasing trend from September to December.The longitudinal and latitudinal gravity centers of habitat moved to eastward and southward,respectively.Under the scenarios of SST increasing from 0.5℃to 4.0℃,the averaged habitat suitability index value became higher in the eastward and southward direction.The findings indicated that,with the SST off Peru increase by 0.5℃,1.0℃,2.0℃and 4.0℃,the favorable habitat of jumbo flying squid became a decrease tendency and moved into east-southward regions.The exploitation of fishing ground of j

关 键 词：茎柔鱼 栖息地适宜性 时空分布 海表面温度上升 秘鲁 

分 类 号：S931.41[农业科学—渔业资源]