Skip Navigation

ICES Journal of Marine Science: Journal du Conseil 2006 63(9):1710-1717; doi:10.1016/j.icesjms.2006.06.014
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Galley, E. A.
Right arrow Articles by Gibb, F. M.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Galley, E. A.
Right arrow Articles by Gibb, F. M.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© 2006 International Council for the Exploration of the Sea

Combined methods of otolith shape analysis improve identification of spawning areas of Atlantic cod

Elizabeth A. Galley, Peter J. Wright* and Fiona M. Gibb

Population Biology Group, Fisheries Research Services, Marine Laboratory PO Box 101, 375 Victoria Road, Aberdeen AB11 9DB, Scotland, UK

*Correspondence to P. J. Wright: tel: +44 1224 295436; fax: +44 1224 295511. e-mail: wrightp{at}marlab.ac.uk.

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.

Keywords: cod, Fourier analysis, North Sea, otolith shape, west coast of Scotland

Received 14 September 2005; accepted 26 June 2006.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 ICES J. Mar. Sci.Home page
N. Burke, D. Brophy, and P. A. King
Otolith shape analysis: its application for discriminating between stocks of Irish Sea and Celtic Sea herring (Clupea harengus) in the Irish Sea
ICES J. Mar. Sci., December 1, 2008; 65(9): 1670 - 1675.
[Abstract] [Full Text] [PDF]

Home page
 ICES J. Mar. Sci.Home page
S. J. Holmes, P. J. Wright, and R. J. Fryer
Evidence from survey data for regional variability in cod dynamics in the North Sea and West of Scotland
ICES J. Mar. Sci., March 1, 2008; 65(2): 206 - 215.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.