Ontogenetic niche partitioning in southern elephant seals from Argentine Patagonia

Autor: Mark A. Hindell, Victoria González Carman, Claudio Campagna, Mirtha Noemi Lewis, Mark Johnson, Randall W. Davis, Diego Rodríguez, Julieta Campagna, Christophe Guinet
Přispěvatelé: Centro para el Estudio de Sistemas Marinos (CESIMAR), Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Instituto de Investigaciones Marinas y Costeras [Mar del Plata] (IIMyC), Facultad de Ciencias Exactas y Naturales [Mar del Plata], Universidad Nacional de Mar del Plata [Mar del Plata] (UNMdP)-Universidad Nacional de Mar del Plata [Mar del Plata] (UNMdP)-Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), Wildlife Conservation Society [Argentina], Marine and Argentina Programs, Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Sea Mammal Research Unit [University of St Andrews] (SMRU), School of Biology [University of St Andrews], University of St Andrews [Scotland]-University of St Andrews [Scotland]-Natural Environment Research Council (NERC), Department of Marine Biology, Texas A&M University [Texas, USA], Texas A&M University [College Station], Institute for Marine and Antarctic Studies and Centre for Marine Socioecology, University of Tasmania [Hobart, Australia] (UTAS)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Marine Mammal Science
Marine Mammal Science, Wiley, 2021, 37, pp.631-651. ⟨10.1111/mms.12770⟩
Campagna, J, Lewis, M N, Carman, V G, Campagna, C, Guinet, C, Johnson, M, Davis, R W, Rodriguez, D H & Hindell, M A 2021, ' Ontogenetic niche partitioning in southern elephant seals from Argentine Patagonia ', Marine Mammal Science, vol. 37, no. 2, pp. 631-651 . https://doi.org/10.1111/mms.12770
ISSN: 0824-0469
1748-7692
Popis: International audience; Elephant seals, Mirounga spp., are highly dimorphic, having different energetic requirements according to age and sex, and foraging in various ecological and oceanographic contexts. Resource partitioning has been shown for the sub‐Antarctic populations of southern elephant seals, M. leonina, where colonies are surrounded by narrow shelves that deepen abruptly. In contrast, seals from Península Valdés (Argentina), in the northernmost extent of the breeding range, face an extended, shallow, temperate, and productive continental shelf. We integrated tracking data from 98 animals (juveniles and adults, males and females) gathered over more than two decades, and found that although all available habitats were used, individuals segregated by age and sex. Juvenile males favored shelf habitats, whereas subadult and adult males also used the shelf break. Juvenile females preferred the shelf and the more distant Argentine Basin used by postbreeding and postmolt adult females. Males showed the highest proportion of area‐restricted search locations, suggesting more spatially concentrated feeding activity, and likely reflecting a preference for foraging habitat and prey. Our results are consistent with those from other populations, implying that elephant seals show remarkable similarities in habitat use by age and sex classes, despite broad differences in the offshore habitats between sub‐Antarctic and temperate ecosystems.
Databáze: OpenAIRE
Externí odkaz: