hays-linkbetween-2009.pdf (473.65 kB)
Link between vertical and horizontal movement patterns of cod in the North Sea
journal contribution
posted on 2009-01-01, 00:00 authored by V Hobson, D Righton, J Metcalfe, Graeme HaysGraeme HaysWe 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.
History
Journal
Aquatic biologyVolume
5Issue
2Pagination
133 - 142Publisher
Inter-ResearchLocation
Oldendorf, GermanyPublisher DOI
ISSN
1864-7782eISSN
1864-7790Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2009, Inter-ResearchUsage metrics
Categories
Keywords
groundfishhorizontal movementgeolocationvertical behaviourlocational accuracyhidden Markov modelScience & TechnologyLife Sciences & BiomedicineMarine & Freshwater BiologyEUROPEAN CONTINENTAL-SHELFFREE-RANGING FISHGADUS-MORHUAATLANTIC CODMIGRATORY BEHAVIORENVIRONMENTAL VARIABLESPOPULATION-STRUCTURESATELLITE-TRACKINGACOUSTIC TRACKINGLOCATION ACCURACYEcology
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