Otolith shape analysis for stock discrimination of two Collichthys genus croaker(Pieces:Sciaenidae,)from the northern Chinese coast  

作　　者：ZHAO Bo LIU Jinhu SONG Junjie CAO Liang DOU Shuozeng 赵博;刘金虎;宋骏杰;曹亮;窦硕增(CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences;University of Chinese Academy of Sciences;Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology)

机构地区：[1]CAS 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 266071,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Oceanology and Limnology》2018年第3期981-989,共9页海洋湖沼学报（英文）

基　　金：Supported by the National Key Basic Research Program of China(973 Program)(No.2015CB453302);the NSFC-Shandong Joint Fund for Marine Science Research Centre(No.U1606404);the Aoshan Science and Technology Innovation Project(No.2015ASKJ02-04)

摘　　要：The otolith morphology of two croaker species(C ollichthys lucidus and C ollichthys niveatus) from three areas(Liaodong Bay, LD; Huanghe(Yellow) River estuary, HRE; Jiaozhou Bay, JZ) along the northern Chinese coast were investigated for species identifi cation and stock discrimination. The otolith contour shape described by elliptic Fourier coefficients(EFC) were analysed using principal components analysis(PCA) and stepwise canonical discriminant analysis(CDA) to identify species and stocks. The two species were well dif ferentiated, with an overall classifi cation success rate of 97.8%. And variations in the otolith shapes were significant enough to discriminate among the three geographical samples of C. lucidus(67.7%) or C. niveatus(65.2%). Relatively high mis-assignment occurred between the geographically adjacent LD and HRE samples, which implied that individual mixing may exist between the two samples. This study yielded information complementary to that derived from genetic studies and provided information for assessing the stock structure of C. lucidus and C. niveatus in the Bohai Sea and the Yellow Sea.The otolith morphology of two croaker species（C ollichthys lucidus and C ollichthys niveatus） from three areas（Liaodong Bay, LD; Huanghe（Yellow） River estuary, HRE; Jiaozhou Bay, JZ） along the northern Chinese coast were investigated for species identifi cation and stock discrimination. The otolith contour shape described by elliptic Fourier coefficients（EFC） were analysed using principal components analysis（PCA） and stepwise canonical discriminant analysis（CDA） to identify species and stocks. The two species were well dif ferentiated, with an overall classifi cation success rate of 97.8%. And variations in the otolith shapes were significant enough to discriminate among the three geographical samples of C. lucidus（67.7%） or C. niveatus（65.2%）. Relatively high mis-assignment occurred between the geographically adjacent LD and HRE samples, which implied that individual mixing may exist between the two samples. This study yielded information complementary to that derived from genetic studies and provided information for assessing the stock structure of C. lucidus and C. niveatus in the Bohai Sea and the Yellow Sea.

关 键 词：otolith size descriptors elliptic Fourier coefficients（EFC） stock structure Collichthys lucidus Collichthys niveatus 

分 类 号：Q959.4[生物学—动物学] O174.2[理学—数学]