摘要
为研究不同水层海水温度对西南大西洋阿根廷滑柔鱼Illex argentinus公海渔场的影响,基于50、100、200 m水层海水温度建立了栖息地适宜指数(habitat suitability index,HSI)模型,根据2013—2017年1—4月西南大西洋公海渔场阿根廷滑柔鱼的捕捞数据与50、100、200 m水层水温数据,基于捕捞努力量计算每个月份不同水层海水温度的适应性指数(suitability index,SI),设立10种权重方案建立综合HSI模型;将HSI≤0.2、0.2<HSI<0.6、HSI≥0.6分别定义为阿根廷滑柔鱼种群的不适宜栖息地、普通栖息地和适宜栖息地,计算10种权重方案中3种类型栖息地的捕捞量、捕捞努力量占比及CPUE变化情况,确定最优权重方案。结果表明:50、100、200 m水深温度SI值权重比值为0.1∶0.1∶0.8时为最优权重方案,其中,200 m水深温度SI值权重占比最大,使用最优权重方案的HSI综合模型可以精确预测阿根廷滑柔鱼的渔场分布,用2017年的渔业数据与环境数据带入基于最优权重方案的综合HSI模型,计算结果显示,1—4月基于产量与捕捞努力量的预测精度均超过50%,且2月、4月的预测精度超过90%。研究表明,利用基于不同水层海水温度的HSI模型预测阿根廷滑柔鱼渔场分布的效果良好,且在50、100、200 m水层中,200 m水层海水温度对阿根廷滑柔鱼栖息地的分布影响最为重要。
In order to explore the effects of sea water temperature at different depths on the fishing ground of Argentine shortfin squid Illex argentinus 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 Southwe
作者
刘赫威
余为
陈新军
朱文斌
LIU Hewei;YU Wei;CHEN Xinjun;ZHU Wenbin(College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, 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;Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, China)
出处
《大连海洋大学学报》
CAS
CSCD
北大核心
2021年第6期1035-1043,共9页
Journal of Dalian Ocean University
基金
浙江省重点研发计划项目(C201902026)
国家重点研发计划项目(2019YFD0901405)
国家自然科学基金(41906073)
上海市自然科学基金(19ZR1423000)
上海市科技创新行动计划(19DZ1207502)。
关键词
阿根廷滑柔鱼
不同水层海水温度
栖息地适宜指数
西南大西洋
Illex argentinus
sea water temperature at different depths
habitat suitability index
Southwest Atlantic Ocean
