中国水产科学2024，Vol.31Issue(4)：465-475,11.DOI:10.12264/JFSC2023-0346
基于结构方程模型研究环境因子对毛里塔尼亚双拖鲣CPUE的影响
Using structural equation modeling to investigate the influence of environmental factors on the CPUE of skipjack tuna(Katsuwonus pelamis)pair trawl fishery in Mauritania
摘要
Abstract
Understanding the intricate relationship between fishery resource abundance and environmental factors is paramount for achieving sustainable fishery development and conservation goals.While previous studies have predominantly focused on the direct impacts of environmental factors on stock distribution and resource abundance,the underlying mechanisms remain poorly understood.To address this gap,we investigated the mechanisms through which various environmental factors and their interactions influence the abundance of skipjack tuna populations in Mauritanian waters.Utilizing catch per unit effort(CPUE)data spanning from 2017 to 2019,we employed structural equation modeling(SEM)to construct a comprehensive model assessing the direct and indirect influences of key environmental variables,including sea surface temperature(SST),sea surface salinity(SSS),sea level anomalies(SLA),dissolved oxygen(DO),and chlorophyll-a concentration(Chl-a),on skipjack tuna CPUE.Our findings demonstrate a well-fitting SEM model,revealing direct effects of SST,SSS,SLA,DO,and Chl-a on skipjack tuna CPUE.Notably,DO and SLA exhibited significant positive correlations with CPUE,while SST,SSS,and Chl-a displayed significant negative correlations.Furthermore,environmental factors such as SST exerted indirect effects on skipjack tuna CPUE through multiple pathways,shedding light on the potential impact mechanisms of SST and other environmental variables on skipjack tuna populations in Mauritanian waters.关键词
鲣/拖网/CPUE/结构方程模型/环境因子/影响路径Key words
Katsuwonus pelamis/pair trawl/CPUE/SEM/environmental factors/impact pathway分类
农业科技引用本文复制引用
张鸿霖,马有成,宋厚成,张健,曾志坚..基于结构方程模型研究环境因子对毛里塔尼亚双拖鲣CPUE的影响[J].中国水产科学,2024,31(4):465-475,11.基金项目
农业农村部全球重要鱼种资源动态监测评估项目. （）
