FN Archimer Export Format PT J TI New insights into behavioural ecology of European seabass off the West Coast of France: implications at local and population scales BT AF de Pontual, Helene Lalire, Maxime Fablet, Ronan Laspougeas, Claire Garren, Francois MARTIN, Stephane DROGOU, Mickael Woillez, Mathieu AS 1:1;2:1,2;3:3;4:4;5:1;6:1;7:1;8:1; FF 1:PDG-RBE-STH-LBH;2:;3:;4:;5:PDG-RBE-STH-LBH;6:PDG-RBE-STH-LBH;7:PDG-RBE-STH-LBH;8:PDG-RBE-STH-LBH; C1 Ifremer, Sciences et Technologies Halieutiques, CS 10070, Plouzané, France CLS, Space Oceanography Division, 8-10 rue Hermes, Ramonville Saint-Agne, France Institut Telecom/Telecom Bretagne, UMR 6285 LabSTICC, CS 83818, Brest Cedex 3, France Parc Naturel Marin d'Iroise, Pointe des Renards, Le Conquet, France C2 IFREMER, FRANCE CLS, FRANCE IMT ATLANTIQUE, FRANCE PARC NATUREL MARIN IROISE, FRANCE SI BREST SE PDG-RBE-STH-LBH IN WOS Ifremer UPR copubli-france IF 3.188 TC 26 UR https://archimer.ifremer.fr/doc/00451/56230/57790.pdf LA English DT Article DE ;cod;connectivity;Data Storage Tag (DST);depth;European sea bass;Dicentrarchus labrax;geolocation;partial migration;spawning site fidelity;temperature;vertical movement AB From 2010 to 2012, 246 data storage tags were deployed on European seabass in the Iroise Natural Marine Park, a marine protected area (MPA) off west Brittany, France. A return rate of 14.6% associated with long time series of data provided new information on fish ecology (e.g. maximum experienced depth greater than 225 m, temperature range 6.80–21.87°C). Depth and temperature series were used to infer individual migration using an innovative hidden Markov model (HMM) especially developed for seabass geolocation. Reconstructed fish tracks revealed that seabass is a partially migratory species, as individuals exhibited either long-distance migrations towards the Bay of Biscay or the Celtic Sea, or residency behaviour in the Iroise Sea. Fidelity to summer feeding areas and to winter spawing areas was demonstrated. These results suggest that the population is spatially structured. The Iroise Sea is likely a mixing zone for different stocks or sub-populations, and may also shelter a resident population. At the population scale, such findings may impact ICES stock assessment and the resulting decisions from EU managers. At the local scale, conservation action could be taken by MPA managers. Besides, this study demonstrates the high potential of archival tags for investigating multi-year behavioural patterns such as site fidelity to offshore spawning areas. PY 2019 PD MAR SO Ices Journal Of Marine Science SN 1054-3139 PU Oxford University Press (OUP) VL 76 IS 2 UT 000465099500017 BP 501 EP 515 DI 10.1093/icesjms/fsy086 ID 56230 ER EF