摘要
研究渔业资源与环境因子的关系,并了解种群分布对环境变化的响应机制,是养护渔业资源、实现渔业可持续发展的基础。渔业资源丰度和种群分布受多种环境因素影响,但目前的研究更多关注环境因素的直接影响,较少考虑环境因素间的相互作用。为了探索不同环境因素对马达加斯加西海岸虾类资源量的影响机制与路径,本研究使用2014-2020年该海域捕虾拖网数据,采用贝叶斯网络分析了降水、径流等海洋环境因子与3种主捕虾类单位捕捞努力量渔获量(catch per unite effort,CPUE)之间的网络关系,探索在多种环境因子影响下3种虾类CPUE的潜在驱动因素。研究结果表明:降水、径流、海面高度距平(sea surface height anomaly,SSHA)和海表面温度(seasurface temperat-ure,SST)是影响印度白虾CPUE的主要因素,径流、SSHA、SST和叶绿素a质量浓度(chlorophyll a mass concentration,Chl a)是影响独角新对虾和短沟对虾的CPUE的主要因素;降水通过不同路径影响其他环境因子进而对3种虾类CPUE产生间接影响:降水通过径流、SST和SSHA的途径对印度白虾产生间接影响,但对于独角新对虾和短沟对虾,降水通过径流、SST、SSHA和Chla的途径产生间接影响。研究结果揭示了马达加斯加西海岸降水和其他海洋环境因子不仅对3种虾类CPUE产生直接影响,降水还能通过影响其他环境因子对虾类种群资源变动的间接影响途径和机制。
Investigating the relationship between fishery resources and environmental factors,along with understanding species distribution response mechanisms to environmental changes,provides fundamental insights for fisheries conservation and sustainable management.While both resource abundance and species distribution are influenced by multiple environmental factors,existing research has primarily emphasized direct environmental effects,with insufficient attention to inter-factor interactions.This study examines the mechanisms through which diverse environmental factors affect shrimp resources along Madagascar's western coast,utilizing shrimp trawl fishery data(2014-2020)and Bayesian network analysis to investigate relationships between precipitation,runoff,marine environmental factors,and catch per unit effort(CPUE)of three key shrimp species.Our analysis identified critical drivers of CPUE variation under combined environmental influences.Results demonstrated that precipitation,runoff,sea surface height anomaly(SSHA),and sea surface temperature(SST)predominantly influenced Fenneropenaeus indicus CPUE.For Metapenaeus monoceros and Penaeus semisulcatus,runoff,SSHA,SST,and chlorophyll a(Chl a)mass concentration constituted primary controlling factors.Precipitation exerted indirect effects on all species'CPUE through environmental mediators:impacting F.indicus via runoff-SST-SSHA pathways,while influencing M.monoceros and P.semisulcatus through runoff-SST-SSHA-Chl a interactions.These findings clarify both direct effects of precipitation and marine environmental factors on shrimp CPUE,and reveal cascading indirect impacts where precipitation modulates population dynamics through environmental intermediaries,elucidating pathway mechanisms underlying these ecological relationships.
作者
胡雪
张鸿霖
赵津
罗家望
宋厚成
张健
唐浩
石建高
Hu Xue;Zhang Honglin;Zhao Jin;Luo Jiawang;Song Houcheng;Zhang Jian;Tang Hao;Shi Jiangao(College of Marine Living Resource Sciences and Management,Shanghai Ocean University,Shanghai 201306,China;Representative Office in Madagascar,Zhongyu Global Seafood Corp.,Guangdong,Shenzhen 515100,China;National Engineering Research Centre 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;East China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Shanghai 200090,China)
出处
《海洋学报》
北大核心
2025年第7期27-37,共11页
基金
国家重点研发计划项目(2024YFD2400200)
国家自然科学基金(32373187)
农业农村部全球重要鱼种资源动态监测评估项目。
关键词
贝叶斯网络
环境因子
虾类
CPUE
降水
径流
bayesian networks
environmental factors
shrimp
CPUE
precipitation
runoff
作者简介
胡雪(2002-),女,湖南省常德市人,从事渔业海洋学研究。E-mail:19173623507@163.com;通信作者:张健,教授,从事生态型渔具渔法研究。E-mail:j-zhang@shou.edu.cn。
