Combined methods of otolith shape analysis improve identification of spawning areas of Atlantic cod
Abstract The effectiveness of otolith shape for identifying Atlantic cod (Gadus morhua) spawning populations in the northern North Sea and west coast of Scotland was investigated. Otolith shape was described using Cartesian Fourier analysis of the otolith outline and morphometric variable rectangula...
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Oxford University Press (OUP)
2006
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Online Access: | http://dx.doi.org/10.1016/j.icesjms.2006.06.014 http://academic.oup.com/icesjms/article-pdf/63/9/1710/29126540/63-9-1710.pdf |
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croxfordunivpr:10.1016/j.icesjms.2006.06.014 2024-05-12T08:00:55+00:00 Combined methods of otolith shape analysis improve identification of spawning areas of Atlantic cod Galley, Elizabeth A. Wright, Peter J. Gibb, Fiona M. 2006 http://dx.doi.org/10.1016/j.icesjms.2006.06.014 http://academic.oup.com/icesjms/article-pdf/63/9/1710/29126540/63-9-1710.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 63, issue 9, page 1710-1717 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2006 croxfordunivpr https://doi.org/10.1016/j.icesjms.2006.06.014 2024-04-18T08:17:40Z Abstract The effectiveness of otolith shape for identifying Atlantic cod (Gadus morhua) spawning populations in the northern North Sea and west coast of Scotland was investigated. Otolith shape was described using Cartesian Fourier analysis of the otolith outline and morphometric variable rectangularity. Pairwise randomization analysis of Fourier descriptors, and discriminant analysis of rectangularity and Fourier descriptors were used to identify differences between spawning stocks. Significant differences and a high classification success (>70%) in otolith shape indicated that spawning groups from Viking Bank and Moray Firth had different shapes from those of cod in other spawning areas. Significant differences in otolith shape of age 2 cod suggested that otoliths from the South Minch and Irish Sea were different from those from the Moray Firth and the Clyde. These results appear consistent with genetic evidence for a low gene flow, and tag-recapture evidence of resident populations. The results of pairwise randomization analysis and discriminant analysis differed slightly, indicating that use of a combination of methods increases the potential to identify spawning groups on the basis of otolith shape. Article in Journal/Newspaper atlantic cod Gadus morhua Oxford University Press Viking Bank ENVELOPE(2.500,2.500,60.333,60.333) ICES Journal of Marine Science 63 9 1710 1717 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Galley, Elizabeth A. Wright, Peter J. Gibb, Fiona M. Combined methods of otolith shape analysis improve identification of spawning areas of Atlantic cod |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract The effectiveness of otolith shape for identifying Atlantic cod (Gadus morhua) spawning populations in the northern North Sea and west coast of Scotland was investigated. Otolith shape was described using Cartesian Fourier analysis of the otolith outline and morphometric variable rectangularity. Pairwise randomization analysis of Fourier descriptors, and discriminant analysis of rectangularity and Fourier descriptors were used to identify differences between spawning stocks. Significant differences and a high classification success (>70%) in otolith shape indicated that spawning groups from Viking Bank and Moray Firth had different shapes from those of cod in other spawning areas. Significant differences in otolith shape of age 2 cod suggested that otoliths from the South Minch and Irish Sea were different from those from the Moray Firth and the Clyde. These results appear consistent with genetic evidence for a low gene flow, and tag-recapture evidence of resident populations. The results of pairwise randomization analysis and discriminant analysis differed slightly, indicating that use of a combination of methods increases the potential to identify spawning groups on the basis of otolith shape. |
format |
Article in Journal/Newspaper |
author |
Galley, Elizabeth A. Wright, Peter J. Gibb, Fiona M. |
author_facet |
Galley, Elizabeth A. Wright, Peter J. Gibb, Fiona M. |
author_sort |
Galley, Elizabeth A. |
title |
Combined methods of otolith shape analysis improve identification of spawning areas of Atlantic cod |
title_short |
Combined methods of otolith shape analysis improve identification of spawning areas of Atlantic cod |
title_full |
Combined methods of otolith shape analysis improve identification of spawning areas of Atlantic cod |
title_fullStr |
Combined methods of otolith shape analysis improve identification of spawning areas of Atlantic cod |
title_full_unstemmed |
Combined methods of otolith shape analysis improve identification of spawning areas of Atlantic cod |
title_sort |
combined methods of otolith shape analysis improve identification of spawning areas of atlantic cod |
publisher |
Oxford University Press (OUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1016/j.icesjms.2006.06.014 http://academic.oup.com/icesjms/article-pdf/63/9/1710/29126540/63-9-1710.pdf |
long_lat |
ENVELOPE(2.500,2.500,60.333,60.333) |
geographic |
Viking Bank |
geographic_facet |
Viking Bank |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
ICES Journal of Marine Science volume 63, issue 9, page 1710-1717 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/j.icesjms.2006.06.014 |
container_title |
ICES Journal of Marine Science |
container_volume |
63 |
container_issue |
9 |
container_start_page |
1710 |
op_container_end_page |
1717 |
_version_ |
1798842979195027456 |