Diversity in habitat use by the East Asian fourfinger threadfin Eleutheronema rhadinum revealed by otolith Sr:Ca and Ba:Ca profiles
文献类型： 外文期刊
作者： Zhang, Shuai 1 ; Li, Min 1 ; Zhu, Jiangfeng 3 ; Xu, Shannan 1 ; Chen, Zuozhi 1 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China
2.Minist Agr & Rural Affairs, Key Lab Sustainable Utilizat Open Sea Fishery, Guangzhou 510300, Peoples R China
3.Shanghai Ocean Univ, Coll Marine Sci, Shanghai 201306, Peoples R China
4.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511548, Peoples R China
5.Guangdong Prov Key Lab Fishery Ecol Environm, Guangzhou 510300, Peoples R China
关键词： Life history; Winter period; Migration plasticity; Eleutheronema rhadinum; Otolith chemistry
期刊名称：AQUATIC BIOLOGY （ 影响因子：2.125； 五年影响因子：2.549 ）
ISSN： 1864-7790
年卷期： 2022 年 31 卷
页码：
收录情况： SCI
摘要： Determining the movement and migration patterns of fish between different environments is crucial for understanding the distribution of fish populations and the ecological mechanisms underlying their spatial dynamics. This study is the first to employ otolith Sr:Ca and Ba:Ca profiles to elucidate habitat use by the commercially valuable estuarine species Eleutheronema rhadinum. Age 1+ fish were present in samples from the East China Sea and South China Sea, caught off China in October to December of 2019. Characterization of both otolith element profiles through a quantitative approach suggested migration plasticity for E. rhadinum, especially during the first year. However, the Ba:Ca profile revealed a more distinct pattern of habitat use compared with the Sr:Ca profile, suggesting that the Ba:Ca ratio is more appropriate for life-history reconstruction of this species. Most individuals appeared to be estuary-dependent, with some appearing to have entered fresh water for a short time during their first year of life. After their first winter, individuals tended to move into coastal waters, and most apparently overwintered in the marine environment. Knowledge of the diverse life-history strategies of this valuable species at different life stages should be incorporated into future conservation and management efforts.
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