Evaluation of removal of the size effect using data scaling and elliptic Fourier descriptors in otolith shape analysis, exemplified by the discrimination of two yellow croaker stocks along the Chinese coast

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	Evaluation of removal of the size effect using data scaling and elliptic Fourier descriptors in otolith shape analysis, exemplified by the discrimination of two yellow croaker stocks along the Chinese coast
	Zhao B(赵博); Liu JH(刘金虎); Song JJ(宋骏杰); Cao L(曹亮); Dou SZ(窦硕增)
发表期刊	Chinese Journal of Oceanology and Limnology
ISSN	0254-4059
	2017-11-15
出版年	2017
卷号	v.35 期号:06 页码:224-234
文献类型	CNKI期刊论文
摘要	Removal of the length ef fect in otolith shape analysis for stock identification using length scaling is an important issue; however, few studies have attempted to investigate the ef fectiveness or weakness of this methodology in application. The aim of this study was to evaluate whether commonly used size scaling methods and normalized elliptic Fourier descriptors(NEFDs) could ef fectively remove the size ef fect of fish in stock discrimination. To achieve this goal, length groups from two known geographical stocks of yellow croaker, L arimichthys polyactis, along the Chinese coast(five groups from the Changjiang River estuary of the East China Sea and three groups from the Bohai Sea) were subjected to otolith shape analysis. The results indicated that the variation of otolith shape caused by intra-stock fish length might exceed that due to inter-stock geographical separation, even when otolith shape variables are standardized with length scaling methods. This variation could easily result in misleading stock discrimination through otolith shape analysis. Therefore, conclusions about fish stock structure should be carefully drawn from otolith shape analysis because the observed discrimination may primarily be due to length ef fects, rather than dif ferences among stocks. The application of multiple methods, such as otoliths shape analysis combined with elemental fingering, tagging or genetic analysis, is recommended for sock identification.
关键词	otolith shape analysis data scaling for fish length stock discrimination removal of length effect
CNKI专辑号	A;D;
CNKI专辑名称	基础科学;农业科技;
CNKI专题号	D052;
CNKI专题名称	水产和渔业;
分类号	S917.4
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the National 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)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/189124
专题	中国科学院海洋研究所
作者单位	1.KeyLaboratoryofMarineEcologyandEnvironmentalSciences,InstituteofOceanology,ChineseAcademyofSciences 2.UniversityofChineseAcademyofSciences 3.LaboratoryforMarineEcologyandEnvironmentalScience,QingdaoNationalLaboratoryforMarineScienceandTechnology
推荐引用方式 GB/T 7714	Zhao B,Liu JH,Song JJ,et al. Evaluation of removal of the size effect using data scaling and elliptic Fourier descriptors in otolith shape analysis, exemplified by the discrimination of two yellow croaker stocks along the Chinese coast. 2017.