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Foraging dynamics of macaroni penguins Eudyptes chrysolophus at South Georgia during brood-guard

Trathan, P.N.; Green, C.; Tanton, J.; Peat, H.; Poncet, J.; Morton, A.. 2006 Foraging dynamics of macaroni penguins Eudyptes chrysolophus at South Georgia during brood-guard. Marine Ecology Progress Series, 323. 239-251. 10.3354/meps3232339

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Abstract/Summary

We used satellite telemetry methods to study macaroni penguins at South Georgia to determine how they ranged from their colonies during the early part of their breeding season at a time when they are constrained to return to their chicks on a near-daily basis. The principal objectives of this study were to examine whether these penguins exploit major oceanographic features where prey may be more predictable, whether birds from one colony forage in separate locations to those from nearby colonies, or whether they range evenly over the available area. Results show that the penguins did not range evenly, that birds from one colony tended to forage in locations separate from those used by birds from nearby colonies (or at least overlap was restricted), and that though birds from some colonies foraged within waters influenced by major oceanographic features such as the southern Antarctic Circumpolar Current front, not all birds in the region focused on such areas, as some birds foraged in other oceanographic contexts. The results from this study highlight the complexity of foraging dynamics for colonially nesting seabirds; they also help inform management models currently being developed for Antarctic krill fisheries, which are a potential competitor for the main prey of macaroni penguins.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.3354/meps3232339
Programmes: BAS Programmes > Global Science in the Antarctic Context (2005-2009) > DISCOVERY 2010 - Integrating Southern Ocean Ecosystems into the Earth System
ISSN: 0171-8630
Additional Information. Not used in RCUK Gateway to Research.: Full text not available from this repository
Additional Keywords: Satellite tracking
NORA Subject Terms: Zoology
Date made live: 05 Oct 2007 11:02
URI: http://nora.nerc.ac.uk/id/eprint/1045

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