| Jiang Tao,Liu Hongbo,Huang Honghui,Yang Jian. 2019. Migration patterns and habitat use of the tapertail anchovy Coilia mystus in the Oujiang River Estuary and the Zhujiang River Estuary, China. Acta Oceanologica Sinica, 38(8):35－40 |
| Migration patterns and habitat use of the tapertail anchovy Coilia mystus in the Oujiang River Estuary and the Zhujiang River Estuary, China |
| 我国瓯江口和珠江口凤鲚洄游模式和生境利用研究 |
| Received:March 22, 2018 |
| DOI：10.1007/s13131-019-1436-0 |
| Key words:Coilia mystus Oujiang River Estuary Zhujiang (Pearl) River Estuary habitat use otolith microchemistry |
| 中文关键词: 凤鲚 瓯江口 珠江口 生境利用 耳石微化学 |
| 基金项目:The China Central Governmental Research Institutional Basic Special Research Project from Public Welfare Fund under contract No. 2016PT01; the Open Project for Key Laboratory of South China Sea Fishery Research Exploitation & Utilization of Ministry of Agriculture under contract No. FREU2015-07; the Central Public-interest Scientific Institution Based Research Fund, Freshwater Fisheries Research Center, CAFS under contract No. 2017JBFR02; the National Natural Science Foundation of China under contract No. 31602159; the Natural Science Foundation of Jiangsu Province, China under contract No. BK20160204. |
| Author Name | Affiliation | E-mail | | Jiang Tao | Key Laboratory of Fishery Ecological Environment Assessment and Research Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China | | | Liu Hongbo | Key Laboratory of Fishery Ecological Environment Assessment and Research Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China | | | Huang Honghui | South China Sea Fishery Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China | | | Yang Jian | Key Laboratory of Fishery Ecological Environment Assessment and Research Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China | jiany@ffrc.cn |
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| Abstract: |
| Habitat use of the tapertail anchovy (Coilia mystus Linnaeus, 1758) from the Oujiang River Estuary and the Zhujiang (Pearl) River Estuary was studied by examining the environmental signatures of Sr and Ca in otoliths using electron probe microanalysis. Individuals from the Oujiang River had higher and varied Sr:Ca ratios (expressed as (Sr:Ca)×1 000, 3.83–13.0 average) in the otolith core regions, suggesting that they were born in brackish or sea waters, and that a freshwater habitat might not be necessary for egg hatching and larval growth. While, individuals from the Zhujiang River had lower Sr:Ca ratios (0.39–2.51 average) in the core regions, suggesting a freshwater origin. After hatching, anchovies from the Zhujiang River migrate downstream to the river estuary close to brackish water. Our results demonstrated varied habitat use for spawning during stages of early life history between the two populations, and suggested that such variations are promoting diversity of life history strategies of this species. |
| 中文摘要: |
| 本研究基于电子探针微区分析技术所获得的瓯江口和珠江口凤鲚（Coilia mystus Linnaeus， 1758）耳石中Sr和Ca元素环境指纹，探索了两水域该鱼种不同群体的生境利用模式。瓯江凤鲚耳石核心可呈现出较高和多变的锶钙比值（表示为Sr：Ca×1000，平均为3.83-13.0）。这反映出该群体中的个体起源于河口半咸水或者海水生境的现象。其孵化或者仔稚鱼成长阶段并不一定需要依赖淡水生境。然而，珠江凤鲚耳石核心表现出较低的锶钙比值（平均为0.39-2.51）。这对应于其在淡水生境中起源的状况。珠江凤鲚受精卵孵化后，还会顺河流向接近半咸水的河口水域移动。本研究结果证实了上述两个凤鲚群体在早期生活史阶段多变的生境利用模式，而这种模式特征对不同水域凤鲚多样性生活史策略的产生起到了促进作用。 |
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