The importance of land-based prey for sympatrically breeding giant petrels at sub-Antarctic Marion Island

Northern (Macronectes halli) and southern (M. giganteus) giant petrels breed at different times at sub-Antarctic Marion Island. Long-term census and breeding success data are used to test for competitive overlap between the two species by correlating population trends with those of land-based prey/c...

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Bibliographic Details
Published in:Antarctic Science
Main Authors: de Bruyn, P.J. Nico, Cooper, John, Bester, Marthán N., Tosh, Cheryl A.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2007
Subjects:
Antarctic
Giganteus
Antarc*
Antarctic Science
Elephant Seal
Giant Petrel
Giant Petrels
Marion Island
Mirounga leonina
Southern Elephant Seal
Online Access:http://dx.doi.org/10.1017/s0954102007000053
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000053
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Summary:Northern (Macronectes halli) and southern (M. giganteus) giant petrels breed at different times at sub-Antarctic Marion Island. Long-term census and breeding success data are used to test for competitive overlap between the two species by correlating population trends with those of land-based prey/carrion species. No parameter was singularly important in population regulation of either giant petrel species and the assumed dependence of breeding northern giant petrels on southern elephant seal Mirounga leonina carrion is not entirely supported.

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