Open Access Repository

New insights into prime Southern Ocean forage grounds for thriving Western Australian humpback whales

Downloads

Downloads per month over past year

Bestley, S ORCID: 0000-0001-9342-669X, Andrews-Goff, V, van Wijk, E, Rintoul, SR ORCID: 0000-0002-7055-9876, Double, MC and How, J 2019 , 'New insights into prime Southern Ocean forage grounds for thriving Western Australian humpback whales' , Scientific Reports, vol. 9, no. 1 , pp. 1-12 , doi: 10.1038/s41598-019-50497-2.

[img]
Preview
PDF (final published paper)
135036 - New in...pdf | Download (2MB)

| Preview

Abstract

Humpback whale populations migrate extensively between winter breeding grounds and summerfeeding grounds, however known links to remote Antarctic feeding grounds remain limited in manycases. New satellite tracks detail humpback whale migration pathways from Western Australia intothe Southern Ocean. These highlight a focal feeding area during austral spring and early summer atthe southern Kerguelen plateau, in a western boundary current where a sharp northward turn andretroflection of ocean fronts occurs along the eastern plateau edge. The topographic steering ofoceanographic features here likely supports a predictable, productive and persistent forage ground. Thespatial distribution of whaling catches and Discovery era mark-recaptures confirms the importance ofthis region to Western Australian humpback whales since at least historical times. Movement modellingdiscriminates sex-related behaviours, with females moving faster during both transit and residentperiods, which may be a consequence of size or indicate differential energetic requirements. Relativelyshort and directed migratory pathways overall, together with high-quality, reliable forage resourcesmay provide a partial explanation for the ongoing strong recovery demonstrated by this population.The combination of new oceanographic information and movement data provides enhancedunderstanding of important biological processes, which are relevant within the context of the currentspatial management and conservation efforts in the Southern Ocean.

Item Type: Article
Authors/Creators:Bestley, S and Andrews-Goff, V and van Wijk, E and Rintoul, SR and Double, MC and How, J
Keywords: Southern Ocean, Kerguelen plateau, Antarctic Circumpolar Current, humpback whales, migration ecology, movement modelling
Journal or Publication Title: Scientific Reports
Publisher: Nature Publishing Group
ISSN: 2045-2322
DOI / ID Number: 10.1038/s41598-019-50497-2
Copyright Information:

© The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

Related URLs:
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP