Genetic diversity and population structure of the northern snakehead (Channa argus Channidae: Teleostei) in central China: implications for conservation and management

文献类型： 外文期刊

第一作者： Yan, Ruo-Jin

作者： Yan, Ruo-Jin;Zhang, Gui-Rong;Guo, Xiang-Zhao;Ji, Wei;Wei, Kai-Jian;Gardner, Jonathan P. A.;Chen, Kun-Ci;Zou, Gui-Wei;Gardner, Jonathan P. A.

作者机构：

关键词： Genetic diversity; Microsatellites; Channa argus; Human-mediated transport; Yangtze-Huai-Huang river system

期刊名称：CONSERVATION GENETICS （ 影响因子：2.538； 五年影响因子：2.32 ）

ISSN： 1566-0621

年卷期： 2018 年 19 卷 2 期

页码：

收录情况： SCI

摘要： Major threats to freshwater fish diversity now include loss of native genetic diversity as a consequence of translocations of fishes between sites and from hatcheries to sites, and small effective population sizes resulting from overfishing and/or habitat loss. Ten polymorphic microsatellite markers were employed to evaluate genetic diversity, population genetic structure and gene flow amongst nine populations of the ecologically and economically important fish, the northern snakehead (Channa argus), in three river systems in central China. Multiple analyses revealed evidence of high genetic diversity and pronounced subdivision based on both regional separation and on river systems. A lack of evidence of genetic bottleneck over recent generations was consistent with the long-term stability of population size and contemporary distribution. The effective population sizes for most C. argus populations were small, suggesting the need for future conservation efforts focusing on these populations. Different lines of evidence point to the local enhancement of stocks by both aquaculture-reared fish and the transfer of wild fish. This study illustrates how human activities may affect genetic diversity and population genetic structure of C. argus populations, and highlights the need for new management regimes to protect native freshwater fish genetic diversity.

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