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Shearwater foraging in the Southern Ocean: The roles of prey availability and winds


Raymond, B and Shaffer, SA and Sokolov, S and Woehler, EJ and Costa, DP and Einoder, L and Hindell, M and Hosie, G and Pinkerton, M and Sagar, PM and Scott, D and Smith, A and Thompson, DR and Vertigan, C and Weimerskirch, H, Shearwater foraging in the Southern Ocean: The roles of prey availability and winds, PLoS One, 5, (6) pp. 1-14. ISSN 1932-6203 (2010) [Refereed Article]


Copyright Statement

2010 Raymond et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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DOI: doi:10.1371/journal.pone.0010960


Background: Sooty (Puffinus griseus) and short-tailed (P. tenuirostris) shearwaters are abundant seabirds that range widely across global oceans. Understanding the foraging ecology of these species in the Southern Ocean is important for monitoring and ecosystem conservation and management. Methodology/PrincipalFindings:Tracking data from sooty and short-tailed shearwaters from three regions of New Zealand and Australia were combined with at-sea observations of shearwaters in the Southern Ocean, physical oceanography, near- surface copepod distributions, pelagic trawl data, and synoptic near-surface winds. Shearwaters from all three regions foraged in the Polar Front zone, and showed particular overlap in the region around 140uE. Short-tailed shearwaters from South Australia also foraged in Antarctic waters south of the Polar Front. The spatial distribution of shearwater foraging effort in the Polar Front zone was matched by patterns in large-scale upwelling, primary production, and abundances of copepods and myctophid fish. Oceanic winds were found to be broad determinants of foraging distribution, and of the flight paths taken by the birds on long foraging trips to Antarctic waters. Conclusions/Significance:The shearwaters displayed foraging site fidelity and overlap of foraging habitat between species and populations that may enhance their utility as indicators of Southern Ocean ecosystems. The results highlight the importance of upwellings due to interactions of the Antarctic Circumpolar Current with large-scale bottom topography, and the corresponding localised increases in the productivity of the Polar Front ecosystem.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Animal behaviour
Objective Division:Environmental Management
Objective Group:Management of Antarctic and Southern Ocean environments
Objective Field:Biodiversity in Antarctic and Southern Ocean environments
UTAS Author:Woehler, EJ (Dr Eric Woehler)
UTAS Author:Hindell, M (Professor Mark Hindell)
UTAS Author:Vertigan, C (Ms Caitlin Vertigan)
ID Code:64598
Year Published:2010
Web of Science® Times Cited:48
Deposited By:Zoology
Deposited On:2010-08-12
Last Modified:2014-11-07
Downloads:653 View Download Statistics

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