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Seasonal migration, site fidelity, and population structure of European seabass (Dicentrarchus labrax)
de Pontual, H.; Heerah, K.; Goossens, J.; Garren, F.; Martinez, S.; Le Ru, L.; Le Roy, D.; Woillez, M. (2023). Seasonal migration, site fidelity, and population structure of European seabass (Dicentrarchus labrax). ICES J. Mar. Sci./J. Cons. int. Explor. Mer fsad087: 1-13. https://dx.doi.org/10.1093/icesjms/fsad087
In: ICES Journal of Marine Science. Academic Press: London. ISSN 1054-3139; e-ISSN 1095-9289
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| Trefwoord |
Dicentrarchus labrax (Linnaeus, 1758) [WoRMS]
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| Author keywords |
biologging, depth, Dicentrarchus labrax, DST data storage tag, European sea bass, geolocation model, large-scale electronic tagging, movement ecology, spawning site fidelity, stock structure, temperature |
| Auteurs | | Top |
- de Pontual, H.
- Heerah, K.
- Goossens, J.
- Garren, F.
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- Martinez, S.
- Le Ru, L.
- Le Roy, D.
- Woillez, M.
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| Abstract |
Large-scale electronic tagging is a very powerful tool to study how fish movements and migrations shape the internal dynamics of populations.This knowledge, crucial for improving fishery management, was still limited for the European seabass, whose stocks in the Northeast Atlantichave declined drastically over the last decade. To better understand the species ecology and the spatio-temporal structure of the population, wetagged seabass in the North Sea, the English Channel, and the Bay of Biscay, from 2014 to 2016. Out of 1220 deployed DSTs, 482 have beenrecovered by November 2022. Approximately half of them included a period of potential spawning migration. Reconstructed trajectories confirmedseabass to be a partial migratory species, as individuals exhibited either long-distance migrations or residence. Most migrants exhibitedfidelity to summer feeding areas and winter spawning areas. Our dataset enriches the knowledge of seabass biological traits (e.g. temperatureand depth ranges, vulnerability to predation and fishing). Our results suggest a spatial structure of the Atlantic population that differs from the stock structure currently considered for assessment and management. The consequences should be explored at both the European level andby regional managers involved in conservation outcomes. |
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