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Elucidating the migrations of European seabass from the southern North Sea using mark-recapture data, acoustic telemetry and data storage tags
Goossens, J.; Woillez, M.; Wright, S.; Edwards, J.E.; De Putter, G.; Torreele, E.; Verhelst, P.; Sheehan, E.; Moens, T.; Reubens, J. (2024). Elucidating the migrations of European seabass from the southern North Sea using mark-recapture data, acoustic telemetry and data storage tags. NPG Scientific Reports 14(1): 13180. https://dx.doi.org/10.1038/s41598-024-63347-7
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322, meer
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| Author keywords |
Animal migration; Behavioural ecology |
| Auteurs | | Top |
- Goossens, J., meer
- Woillez, M.
- Wright, S.
- Edwards, J.
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- Sheehan, E.
- Moens, T., meer
- Reubens, J., meer
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| Abstract |
The movement ecology of European seabass, Dicentrarchus labrax, remains poorly understood, especially in the northern ranges of its distribution. To investigate migration patterns of seabass from the southern North Sea, we combined data from different projects from four countries using various tagging techniques. This resulted in 146 recaptures (out of 5598 externally marked seabass), 138 detected animals (out of 162 seabass fitted with an acoustic transmitter) and 76 archived depth and temperature series (out of 323 seabass with an archival tag). Using geolocation modelling, we distinguished different migration strategies, whereby individual fish migrated to the eastern English Channel (15.1%), the western English Channel (28.3%), the Celtic Sea and the norther part of the Bay of Biscay (17.0%), or stayed in the North Sea (39.6%). A high number of seabass exhibited fidelity to the North Sea (90.5% of recaptures, 55.3% for acoustic transmitters and 44.7% of archival tags). Although seabass are generally considered to migrate southwards in winter, a large number of individuals (n = 62) were observed in the southern North Sea, where spawning might potentially occur in a particular deep location along the coast of Norfolk in the UK. Our results highlight the need to consider fine-scaled population structuring in fisheries assessment, and indicate that current seasonal fisheries closures are not aligned with the ecology of seabass in the North Sea. |
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