Ecologie en mer des phoques de Weddell de l'Antarctique de l'Est en relation avec les param etres physiques de l'environnement = At sea ecology of Weddell seals in East Antarctica in relation with environmental physical parameters ...

• Main Author: Heerah, K
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: East Antarctica; Phoques; Southern Ocean; Weddell; Antarc*; Antarctica; Sea ice; Weddell Seals
• Online Access: https://dx.doi.org/10.25959/23241404; https://figshare.utas.edu.au/articles/thesis/Ecologie_en_mer_des_phoques_de_Weddell_de_l_Antarctique_de_l_Est_en_relation_avec_les_param_etres_physiques_de_l_environnement_At_sea_ecology_of_Weddell_seals_in_East_Antarctica_in_relation_with_environmental_physical_parameters/23241404

The Southern Ocean and more specifically the sea-ice zone supports globally significant ecosystems including abundant populations of marine mammals and seabirds. In the marine environment, resources are heterogeneously distributed and structured in patches driven by physical features of the environment at different spatio-temporal scales. Among the activities included in the habitat use concept, foraging is one of the most important because obtaining adequate food supply is a basic requirement of all other life-history traits. The optimal foraging theory predicts that predators should adjust their movements and behaviour in relation to prey density (in both horizontal and vertical dimensions in the case of marine predators). Thus, studying the movement patterns and diving behaviour of top predators in relation with biotic and abiotic environmental features can provide valuable insights in the behavioural tactics they have evolved and/or learned to maximize prey acquisition in a given environment. This is ...