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

VJ Hobson, D Righton, JD Metcalfe, GC Hays, Graeme Hays, Victoria Hobson

Aquatic Biology, Volume: 5, Pages: 133 - 142

Swansea University Authors: Graeme Hays, Victoria Hobson

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DOI (Published version): 10.3354/ab00144

Abstract

<p>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 p...

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Published in: Aquatic Biology
ISSN: 1864-7782 1864-7790
Published: Inter-Research 2009
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URI: https://cronfa.swan.ac.uk/Record/cronfa6127
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spelling 2011-10-01T00:00:00.0000000 v2 6127 2011-10-01 Link between vertical and horizontal movement patterns of cod in the North Sea e40f098395f86f19debb12442dd95ac3 Graeme Hays Graeme Hays true false 9024f9f0a80d2d248c7c6efb2e715c37 Victoria Hobson Victoria Hobson true false 2011-10-01 SBI <p>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.</p> Journal Article Aquatic Biology 5 133 142 Inter-Research 1864-7782 1864-7790 31 3 2009 2009-03-31 10.3354/ab00144 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University 2011-10-01T00:00:00.0000000 2011-10-01T00:00:00.0000000 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences VJ Hobson 1 D Righton 2 JD Metcalfe 3 GC Hays 4 Graeme Hays 5 Victoria Hobson 6
title Link between vertical and horizontal movement patterns of cod in the North Sea
spellingShingle Link between vertical and horizontal movement patterns of cod in the North Sea
Graeme Hays
Victoria Hobson
title_short Link between vertical and horizontal movement patterns of cod in the North Sea
title_full Link between vertical and horizontal movement patterns of cod in the North Sea
title_fullStr Link between vertical and horizontal movement patterns of cod in the North Sea
title_full_unstemmed Link between vertical and horizontal movement patterns of cod in the North Sea
title_sort Link between vertical and horizontal movement patterns of cod in the North Sea
author_id_str_mv e40f098395f86f19debb12442dd95ac3
9024f9f0a80d2d248c7c6efb2e715c37
author_id_fullname_str_mv e40f098395f86f19debb12442dd95ac3_***_Graeme Hays
9024f9f0a80d2d248c7c6efb2e715c37_***_Victoria Hobson
author Graeme Hays
Victoria Hobson
author2 VJ Hobson
D Righton
JD Metcalfe
GC Hays
Graeme Hays
Victoria Hobson
format Journal article
container_title Aquatic Biology
container_volume 5
container_start_page 133
publishDate 2009
institution Swansea University
issn 1864-7782
1864-7790
doi_str_mv 10.3354/ab00144
publisher Inter-Research
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 0
active_str 0
description <p>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.</p>
published_date 2009-03-31T03:07:34Z
_version_ 1763749767712604160
score 11.016235

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