基于耳石微化学的珠江水系日本鳗鲡洄游特征研究  

MIGRATION CHARACTERISTICS OF JAPANESE EEL IN THE PEARL RIVER SYSTEM BASED ON OTOLITH MICROCHEMISTRY

作　　者：贾秋菊 帅方敏[2,3,4,5] 李捷 JIA Qiu-Ju;SHUAI Fang-Min;LI Jie(College of Marine Living Resource Science and Management,Shanghai Ocean University,Shanghai 201306,China;The Pearl River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou 510380,China;National Fishery Resources and Environment Guangzhou Observation Experimental Station,Guangzhou 510380,China;Key Laboratory of Prevention and Control for Aquatic Invasive Alien Species,Ministry of Agriculture and Rural Affairs,Guangzhou 510380,China;Guangdong Provincial Key Laboratory of Aquatic Animal Immunology and Sustainable Aquaculture,Guangzhou 510380,China)

机构地区：[1]上海海洋大学海洋生物资源与管理学院,上海201306 [2]中国水产科学研究院珠江水产研究所,广州510380 [3]国家渔业资源环境广州观测实验站,广州510380 [4]农业农村部外来入侵水生生物防控重点实验室,广州510380 [5]广东省水产动物免疫与绿色养殖重点实验室,广州510380

出　　处：《水生生物学报》2024年第10期1758-1765,共8页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金面上项目(31870527);农业农村部财政资金项目;广州市科技计划项目(202201010761);珠江渔业资源调查与评估创新团队项目(2023TD10);中国东盟海上合作基金(CAMC–2018F);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资助。

摘　　要：为了解珠江水系日本鳗鲡(Anguilla japonica)洄游生态特征,有效保护鳗鲡野生种群,采集了柳州、合山、武宣、桂平、梧州等11个淡水生境以及珠海1个河口生境共155尾日本鳗鲡,利用电子探针微区分析仪测定耳石中的Sr、Ca元素比值,对耳石微化学Sr/Ca进行分析,结果发现珠江水系日本鳗鲡具有“海水–淡水”、“海水–河口–淡水”、“海水–河口–海水–河口–淡水”、“海水–河口–淡水–河口–淡水”等多种洄游模式。但总体而言,最终都会洄游到淡水中育肥。这说明珠江水系的日本鳗鲡具有适应不同栖息地和盐度的能力,在不同水域之间表现出灵活的洄游策略,同时也说明了淡水栖息地保护的重要性。In order to understand the migratory ecological characteristics of Japanese eel(Anguilla japonica)in Pearl River water system and effectively protect the wild population of eel,a total of 155 Japanese eels were collected from 11 freshwater habitats such as Liuzhou,Heshan,Wuxuan,Guiping,Wuzhou,and one estuary habitat in Zhuhai.Using electron probe microanalysis to determine the ratio of Sr and Ca elements in otoliths and analyze the micro chemical Sr/Ca of otoliths,this study found that Japanese eel in the Pearl River has many migration patterns,such as“seawater-freshwater”,“seawater-estuarine-freshwater”,“seawater-estuarine-seawater-estuarine-freshwater”,and“seawater-estuarine-freshwater-estuarine-freshwater”.However,these eels ultimately towards freshwater habitats for the purpose of fattening.This observation underscores the adaptability of Japanese eel in the Pearl River to diverse habitats and salinity levels,exemplifying their flexible migration strategies across different water bodies.Furthermore,it accentuates the critical importance of safeguarding freshwater habitats.

关 键 词：降河洄游 耳石微化学 Sr/Ca 珠江 日本鳗鲡 

分 类 号：S932.4[农业科学—渔业资源]