Song recordings suggest feeding ground sharing in Southern Hemisphere humpback whales.

Autor: Schall E; Ocean Acoustics Group, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Klußmannstraße 3d, 27570, Bremerhaven, Germany. elena.schall@awi.de., Djokic D; Laboratory of Bioacoustics, Federal University of Rio Grande do Norte, Natal, Brazil.; Behavior and Psychobiology Graduate Program, Biosciences Center, Federal University of Rio Grande do Norte, Natal, Brazil., Ross-Marsh EC; Department of Botany and Zoology, Stellenbosch University c/o Sea Search Reserch and Conservation, Stellenbosch, South Africa., Oña J; Colegio de Ciencias Biológicas y Ambientales and Galápagos Science Center, Universidad San Francisco de Quito, Quito, Ecuador.; Acoustic Ecology Program, CETACEA, Proyecto, Ecuador., Denkinger J; Colegio de Ciencias Biológicas y Ambientales and Galápagos Science Center, Universidad San Francisco de Quito, Quito, Ecuador.; Acoustic Ecology Program, CETACEA, Proyecto, Ecuador., Ernesto Baumgarten J; Applied Ecology and Conservation Lab, State University of Santa Cruz, Ilhéus, Brazil.; Department of Biological Science, State University of Santa Cruz, Ilhéus, Brazil., Rodrigues Padovese L; Laboratory of Acoustics and Environment, University of Sao Paulo, Sao Paulo, Brazil., Rossi-Santos MR; Acoustic Ecology and Animal Behaviour Laboratory, Universidade Federal do Recôncavo da Bahia, Cruz das Almas, Brazil.; Centre for Marine Science and Technology, Curtin University, Bentley, Australia., Carvalho Gonçalves MI; Applied Ecology and Conservation Lab, State University of Santa Cruz, Ilhéus, Brazil.; Graduate Program in Ecology and Biodiversity Conservation, State University of Santa Cruz, Ilhéus, Brazil.; Parque Científico e Tecnológico do Sul da Bahia, Ilhéus, Brazil., Sousa-Lima R; Laboratory of Bioacoustics, Federal University of Rio Grande do Norte, Natal, Brazil.; Behavior and Psychobiology Graduate Program, Biosciences Center, Federal University of Rio Grande do Norte, Natal, Brazil., Hucke-Gaete R; NGO Centro Ballena Azul, Universidad Austral de Chile, Valdivia, Chile.; Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile., Elwen S; Department of Botany and Zoology, Stellenbosch University c/o Sea Search Reserch and Conservation, Stellenbosch, South Africa., Buchan S; Center for Oceanographic Research COPAS Sur-Austral and COPAS Coastal, University of Concepción, Concepción, Chile.; Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, University of Concepción, Concepción, Chile.; Centro de Estudios Avanzados en Zonas Áridas (CEAZA), La Serena, Chile., Gridley T; Department of Botany and Zoology, Stellenbosch University c/o Sea Search Reserch and Conservation, Stellenbosch, South Africa., Van Opzeeland I; Ocean Acoustics Group, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Klußmannstraße 3d, 27570, Bremerhaven, Germany.; Helmholtz Institute for Functional Marine Biodiversity, Carl Von Ossietzky University Oldenburg, Oldenburg, Germany.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Aug 17; Vol. 12 (1), pp. 13924. Date of Electronic Publication: 2022 Aug 17.
DOI: 10.1038/s41598-022-17999-y
Abstrakt: The Atlantic sector of the Southern Ocean (ASSO) has one of the highest densities of Antarctic krill (Euphausia superba) compared to other polar and subpolar regions, which attracts migratory baleen whale species to aggregate in this area for feeding. Humpback whales (Megaptera novaeangliae) also sing extensively while on the Southern Ocean feeding grounds which allows for the exploration of song similarity between feeding grounds and breeding populations which helps to understand population mixing. The results of comparative song analyses between the ASSO and the Ecuadorian and Brazilian breeding populations and recordings from the Chilean, South African and Namibian migration routes/mid-latitude feeding grounds revealed that individuals from at least three humpback whale breeding populations most likely migrate to shared feeding grounds in the ASSO. Humpback whales from different populations potentially mix at different times (i.e., years) at feeding hotspots in variable locations. The ASSO seems to provide sufficient prey resources and seems to present an important area for both cultural and maybe even genetic exchange between populations supporting the maintenance of large gene pools. Assuming that multi-population feeding hotspots are also suitable habitat for krill and other krill-dependent predators, these areas in the ASSO should be carefully managed integrating population, ecosystem and fisheries management.
(© 2022. The Author(s).)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje