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Variation in early growth of Neosalanx taihuensis between two populations above and below the Three Gorges Dam, China

文献类型： 外文期刊

作者： Gong, Wangbao 1 ; Wu, Lang 1 ; Xie, Shouqi 1 ; Liu, Jiashou 1 ; Murphy, Brian R. 3 ; Xie, Songguang 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Biodivers & Conservat Aquat Organisms, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China

2.Chinese Acad Fishery Sci, Key Lab Trop & Subtrop Fishery Resource Applicat, Minist Agr, Pearl River Fisheries Res Inst, Guangzhou 510380, Guangdong, Peoples R China

3.Virginia Polytech Inst & State Univ, Dept Fish & Wildlife Conservat, Blacksburg, VA 24061 USA

关键词： early life history;otolith;Three-Gorges Reservoir;Tian-e-zhou Oxbow;Neosalanx taihuensis

期刊名称：JOURNAL OF FRESHWATER ECOLOGY （ 影响因子：1.132； 五年影响因子：1.593 ）

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收录情况： SCI

摘要： Otolith microstructure was analyzed to determine the early growth of Neosalanx taihuensis juveniles from Three-Gorges Reservoir (TGR) and Tian-e-zhou Oxbow (TEO, below the dam). The early growth of the N. taihuensis juveniles differed significantly between the two populations. Higher relative condition index and wider otolith increments of the fish in the TGR indicated the faster early growth and larger otolith nucleus radius indicated the larger size of larvae at hatch for the TGR population, whichmay result in higher early survival rate. We suggest that increased primary production and food availability following the impoundment of the TGR contributed importantly to the increased early growth and survival of the N. taihuensis population. Fisherymanagement and conservation in the TGR should consider the potential impacts to other fish species and the ecosystem of the increasing abundance of N. taihuensis.

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