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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 Bo1,2; Liu Jinhu1; Song Junjie1,2; Cao Liang1; Dou Shuozeng1,2,3
2017-11-01
Source PublicationCHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN0254-4059
Volume35Issue:6Pages:1482-1492
Corresponding AuthorDou Shuozeng(szdou@qdio.ac.cn)
AbstractRemoval of the length effect in otolith shape analysis for stock identification using length scaling is an important issue; however, few studies have attempted to investigate the effectiveness 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 effectively remove the size effect of fish in stock discrimination. To achieve this goal, length groups from two known geographical stocks of yellow croaker, Larimichthys 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 effects, rather than differences 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.
Keywordotolith shape analysis data scaling for fish length stock discrimination removal of length effect
DOI10.1007/s00343-017-6012-x
Indexed BySCI
Language英语
Funding ProjectNational Basic Research Program of China (973 Program)[2015CB453302] ; NSFC-Shandong Joint Fund for Marine Science Research Centre[U1606404] ; Aoshan Science and Technology Innovation Project[2015ASKJ02-04]
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000415810900019
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/157318
Collection海洋生态与环境科学重点实验室
Corresponding AuthorDou Shuozeng
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao Bo,Liu Jinhu,Song Junjie,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[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2017,35(6):1482-1492.
APA Zhao Bo,Liu Jinhu,Song Junjie,Cao Liang,&Dou Shuozeng.(2017).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.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,35(6),1482-1492.
MLA Zhao Bo,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".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 35.6(2017):1482-1492.
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