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Link between vertical and horizontal movement patterns of cod in the North Sea

Hobson, Victoria J., Righton, David, Metcalfe, Julian D. and Hays, Graeme C. 2009, Link between vertical and horizontal movement patterns of cod in the North Sea, Aquatic biology, vol. 5, no. 2, pp. 133-142, doi: 10.3354/ab00144.

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Title Link between vertical and horizontal movement patterns of cod in the North Sea
Author(s) Hobson, Victoria J.
Righton, David
Metcalfe, Julian D.
Hays, Graeme C.ORCID iD for Hays, Graeme C. orcid.org/0000-0002-3314-8189
Journal name Aquatic biology
Volume number 5
Issue number 2
Start page 133
End page 142
Total pages 10
Publisher Inter-Research
Place of publication Oldendorf, Germany
Publication date 2009
ISSN 1864-7782
1864-7790
Keyword(s) groundfish
horizontal movement
geolocation
vertical behaviour
locational accuracy
hidden Markov model
Summary We used a geolocation method based on tidal amplitude and water depth to assess the horizontal movements of 14 cod Gadus morhua equipped with time-depth recorders (TDR) in the North Sea and English Channel. Tracks ranged from 40 to 468 d and showed horizontal movements of up to 455 km and periods of continuous localised residence of up to 360 d. Cod spent time both in midwater (43% of total time) and near the seabed (57% of total time). A variety of common vertical movement patterns were seen within periods of both residence and directed horizontal movement. Hence particular patterns of vertical movement could not unequivocally define periods of migration or localised residence. After long horizontal movements, cod tended to adopt resident behaviour for several months and then return to broadly the same location where they were tagged, indicating a geospatial instinct. The results suggest that residence and homing behaviour are important features of Atlantic cod behaviour.
Language eng
DOI 10.3354/ab00144
Field of Research 069999 Biological Sciences not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2009, Inter-Research
Persistent URL http://hdl.handle.net/10536/DRO/DU:30058327

Document type: Journal Article
Collections: School of Life and Environmental Sciences
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.