Foraging behaviour of southern elephant seals over the Kerguelen Plateau - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Marine Ecology Progress Series Année : 2014

Foraging behaviour of southern elephant seals over the Kerguelen Plateau

Résumé

A total of 79 (37 juvenile male, 42 adult female) southern elephant seals Mirounga leonina from the Kerguelen Islands were tracked between 2004 and 2009. Area-restricted search patterns and dive behaviour were established from location data gathered by CTD satelliterelayed data loggers. At-sea movements of the seals demonstrated that >40% of the juvenile elephant seal population tagged use the Kerguelen Plateau during the austral winter. Search activity increased where temperature at 200 m depth was lower, when closer to the shelf break, and, to a lesser extent, where sea-surface height anomalies were higher. However, while this model explained the observed data (F1,242 = 88.23, p < 0.0001), bootstrap analysis revealed poor predictive capacity (r2 = 0.264). There appears to be potential overlap between the seals and commercial fishing operations in the region. This study may therefore support ecosystem-based fisheries management of the region, with the aim of maintaining ecological integrity of the shelf.
Fichier principal
Vignette du fichier
m502p281.pdf (1.56 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-00998949 , version 1 (07-09-2021)

Licence

Identifiants

Citer

Malcolm O'Toole, Mark A. Hindell, Jean-Benoit Charrassin, Christophe Guinet. Foraging behaviour of southern elephant seals over the Kerguelen Plateau. Marine Ecology Progress Series, 2014, 502, pp.281-294. ⟨10.3354/meps10709⟩. ⟨hal-00998949⟩
172 Consultations
113 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More