广东沿岸重要河口玻璃鳗资源量空间分布特征
SPATIAL PATTERNS OF GLASS EEL DISTRIBUTION IN THE IMPORTANT RIVER ESTUARY ALONG THE COAST OF GUANGDONG PROVINCE
摘要
Abstract
With the decline of global eel resources,understanding the spatial distribution patterns of eels,especially the habitat selection of the glass eels,is crucial for elucidating their population behavior mechanisms,identifying migra-tion trajectories,and protecting"hotspots"and"key"areas.Therefore,this study analyzed the characteristics of glass eel resources in the Pearl River estuary based on six stations investigation.This study found that the glass eel resources in the important river estuary along the coast of Guangdong Province gradually decreased from east to west(from Chouzhou to Zhuhai),and the key fishing areas were Lianyang,Rongjiang,and Longjiang River estuaries.Seasonal occurrence from December to March,with a peak in February.Most of the glass eels with a total length about 50 mm,in the form of transparent.The relationship between the spatial distribution of glass eel and environmental factors was analyzed using the Redundancy Analysis(RDA)method,and it was found that the abundance of glass eel showed a spatial autocorrelation relationship.Overall,it was positively affected by runoff and tidal range,negatively affected by water salinity,and greatly influenced by physical environmental factors(such as river runoff,tides,etc.)rather than chemical environmental factors(such as COD,DO,pH,etc.)(P<0.05).As part of long-term investigation of eel resources in the Pearl River system,the results of this study provide basic data for glass eel management in the impor-tant river estuary along the coast of Guangdong Province,and are of great significance for clarifying their migration characteristics.关键词
资源调查/广东沿岸/空间分布/冗余分析/环境因子/玻璃鳗Key words
Resource investigation/Guangdong coast/Spatial distribution/RDA/Environmental factors/Glass eels分类
农业科技引用本文复制引用
帅方敏,李捷,罗渡,夏雨果,贾秋菊..广东沿岸重要河口玻璃鳗资源量空间分布特征[J].水生生物学报,2025,49(11):1-9,9.基金项目
农业农村部财政资金项目(珠江流域渔业资源及栖息地调查) （珠江流域渔业资源及栖息地调查）
珠江渔业资源调查与评估创新团队项目(2023TD-10) （2023TD-10）
国家自然科学基金面上项目(31870527) （31870527）
中国东盟海上合作基金(CAMC-2018F) （CAMC-2018F）
广东省农业农村厅项目——广东鳗苗资源调查监测与专项捕捞对渔业生产影响评估资助[Supported by the Project of Financial Funds of Ministry of Agriculture and Ruaral Affairs,Investigation of Fishery Resources and Habitat in the Pearl River Basin （）
Project of IInnovation Team of Survey and Assessment of the Pearl River Fishery Resources(2023TD10) （2023TD10）
National Natural Science Foundation of China General Project(31870527) （31870527）
China ASEAN Maritime Cooperation Fund(CAMC-2018F) （CAMC-2018F）
Guangdong Provincial Department of Agriculture and Rural Affairs Project(Investigation of Glass Eel Resources in Guangdong and Assessment of the Impact of Special Fishing on Fishery Production)] （Investigation of Glass Eel Resources in Guangdong and Assessment of the Impact of Special Fishing on Fishery Production）
