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ICES Journal of Marine Science: Journal du Conseil Advance Access published online on November 11, 2009
ICES Journal of Marine Science: Journal du Conseil, doi:10.1093/icesjms/fsp252
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© 2009 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Horizontal and vertical movements of swordfish in the Southeast Pacific

Francisco J. Abascal1, Jaime Mejuto2, Manuel Quintans2 and Ana Ramos-Cartelle2

1 C. O. Canarias, Instituto Español de Oceanografía, Apdo 1373, 38120 Santa Cruz de Tenerife, Spain
2 C. O. La Coruña, Instituto Español de Oceanografía, Apdo 130, 15001 La Coruña, Spain

Correspondence to F. J. Abascal: tel: +34 922 549 400; fax: +34 922 549 554; e-mail: francisco.abascal{at}ca.ieo.es

Abascal, F. J., Mejuto, J., Quintans, M., and Ramos-Cartelle, A. 2010. Horizontal and vertical movements of swordfish in the Southeast Pacific. – ICES Journal of Marine Science, 67: 000–000.

In all, 21 swordfish (Xiphias gladius) were tagged with pop-up archival satellite tags in the Southeast Pacific. Despite problems of premature release, the information obtained provided insight into the horizontal and vertical behaviour of the species in the area. A consistent migratory pattern was observed, fish moving northwest by autumn and presumably returning south by early spring. Swordfish typically forage in deep water during the day and stay in the mixed layer at night, although this behaviour is occasionally modified. The maximum depth recorded was 1136 m, and dives deeper than 900 m were found in five of the six tags analysed. There was a significant positive relationship between average depth by night and visible moon fraction.

Keywords: habitat preferences, migratory movements, PSAT, swordfish, tagging, Xiphias gladius

Received 7 May 2009; accepted 7 October 2009.


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