Genetic variation within and among range-wide populations of three ecotypes of the Japanese grenadier anchovy Coilia nasus with implications to its conservation and management  

作　　者：XUE Dongxiu YANG Qiaoli ZONG Shaobing GAO Tianxiang LIU Jinxian 

机构地区：[1]Key Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China [2]Laboratory for Marine Ecology and Environmental Science,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China [3]Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China [4]University of Chinese Academy of Sciences,Beijing 100049,China [5]School of Fisheries,Zhejiang Ocean University,Zhoushan 316022,China

出　　处：《Journal of Oceanology and Limnology》2020年第3期851-861,共11页海洋湖沼学报（英文）

基　　金：Supported by the Shandong Joint Fund for Marine Ecology and Environmental Sciences(No.U1606404);the Aoshan Talents Program supported by Qingdao National Laboratory of Marine Science and Technology(No.2015ASTP-ES05);the China Postdoctoral Science Foundation(No.2018M632734);the National Natural Science Foundation of China(No.41776171)。

摘　　要：Studies of range-wide populations can contribute to the comprehension of the relative roles of historical events and contemporary factors that influence genetic variation within and among populations.Japanese grenadier anchovy,Coilia nasus,is a commercially important fish,which widely distributes in the Changjiang River,the coasts of China and Korea,and the Ariake Sea of Japan.This species exhibits three life-history strategies(anadromous,landlocked and freshwater resident forms).Using two fragments of nuclear DNA,genetic variation within and among 18 populations across the rivers and coast of China and Ariake Sea of Japan was examined.Patterns of genetic diversity and divergence among populations varied widely across C.nasus'range,and indicated the different effects of historical events and anthropogenic factors.Strong genetic divergence between freshwater resident populations and other populations suggested that historical geographical factors greatly influenced the genetic structure of C.nasus.Significant genetic differentiation observed among lakes in lower Changjiang River and Huaihe River might be probably influenced by hydraulic facilities.The population genetic structure among the three ecotypes revealed in the present study indicated an important role for environment variation,and the factors responsible for shaping C.nasus different life history strategies might also impact population structure.

关 键 词：JAPANESE grenadier ANCHOVY population structure ANTHROPOGENIC factors LIFE-HISTORY nuclear DNA sequences 

分 类 号：Q953[生物学—动物学]