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
Removal 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...
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/157316 2023-05-15T16:19:18+02:00 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 Bo Liu Jinhu Song Junjie Cao Liang Dou Shuozeng 2017-11-01 http://ir.qdio.ac.cn/handle/337002/157316 https://doi.org/10.1007/s00343-017-6012-x 英语 eng SCIENCE PRESS CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY http://ir.qdio.ac.cn/handle/337002/157316 doi:10.1007/s00343-017-6012-x otolith shape analysis data scaling for fish length stock discrimination removal of length effect Marine & Freshwater Biology Oceanography Limnology COD GADUS-MORHUA LARIMICHTHYS-POLYACTIS POPULATION-STRUCTURE NORTHWEST ATLANTIC SAGITTAL OTOLITH IDENTIFICATION MERLUCCIUS MACKEREL WATERS TOOL 期刊论文 2017 ftchinacasciocas https://doi.org/10.1007/s00343-017-6012-x 2022-06-27T05:39:24Z Removal 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. Report Gadus morhua Northwest Atlantic Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Chinese Journal of Oceanology and Limnology 35 6 1482 1492 |
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Open Polar |
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Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
otolith shape analysis data scaling for fish length stock discrimination removal of length effect Marine & Freshwater Biology Oceanography Limnology COD GADUS-MORHUA LARIMICHTHYS-POLYACTIS POPULATION-STRUCTURE NORTHWEST ATLANTIC SAGITTAL OTOLITH IDENTIFICATION MERLUCCIUS MACKEREL WATERS TOOL |
spellingShingle |
otolith shape analysis data scaling for fish length stock discrimination removal of length effect Marine & Freshwater Biology Oceanography Limnology COD GADUS-MORHUA LARIMICHTHYS-POLYACTIS POPULATION-STRUCTURE NORTHWEST ATLANTIC SAGITTAL OTOLITH IDENTIFICATION MERLUCCIUS MACKEREL WATERS TOOL Zhao Bo Liu Jinhu Song Junjie Cao Liang Dou Shuozeng 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 |
topic_facet |
otolith shape analysis data scaling for fish length stock discrimination removal of length effect Marine & Freshwater Biology Oceanography Limnology COD GADUS-MORHUA LARIMICHTHYS-POLYACTIS POPULATION-STRUCTURE NORTHWEST ATLANTIC SAGITTAL OTOLITH IDENTIFICATION MERLUCCIUS MACKEREL WATERS TOOL |
description |
Removal 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. |
format |
Report |
author |
Zhao Bo Liu Jinhu Song Junjie Cao Liang Dou Shuozeng |
author_facet |
Zhao Bo Liu Jinhu Song Junjie Cao Liang Dou Shuozeng |
author_sort |
Zhao Bo |
title |
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 |
title_short |
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 |
title_full |
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 |
title_fullStr |
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 |
title_full_unstemmed |
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 |
title_sort |
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 |
publisher |
SCIENCE PRESS |
publishDate |
2017 |
url |
http://ir.qdio.ac.cn/handle/337002/157316 https://doi.org/10.1007/s00343-017-6012-x |
genre |
Gadus morhua Northwest Atlantic |
genre_facet |
Gadus morhua Northwest Atlantic |
op_relation |
CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY http://ir.qdio.ac.cn/handle/337002/157316 doi:10.1007/s00343-017-6012-x |
op_doi |
https://doi.org/10.1007/s00343-017-6012-x |
container_title |
Chinese Journal of Oceanology and Limnology |
container_volume |
35 |
container_issue |
6 |
container_start_page |
1482 |
op_container_end_page |
1492 |
_version_ |
1766005682721521664 |