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Are age-related variations in breeding performance greatest when food availability is limited?

Bunce, Ashley, Ward, S. J. and Norman, F. I. 2005, Are age-related variations in breeding performance greatest when food availability is limited?, Journal of zoology, vol. 266, no. 2, pp. 163-169, doi: 10.1017/S0952836905006734.

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Title Are age-related variations in breeding performance greatest when food availability is limited?
Author(s) Bunce, Ashley
Ward, S. J.
Norman, F. I.
Journal name Journal of zoology
Volume number 266
Issue number 2
Start page 163
End page 169
Publisher Cambridge University Press
Place of publication Cambridge, England
Publication date 2005-06
ISSN 0952-8369
1469-7998
Keyword(s) Australasian gannet
Morus serrator
parental age
reproductive success
food availability
Summary Age-related improvements in reproductive performance in seabirds have been well documented, and may be explained by improvements in foraging efficiency or increased experience and reproductive effort with age. The interactive effects of parental age and food supply on reproductive performance, however, remain poorly understood. A widespread mass mortality of pilchards Sardinops sagax in southern Australian waters in 1998 provided a unique opportunity to investigate the effects of a sudden reduction in the availability of amajor prey species on Australasian gannets Morus serrator, an important local marine predator. Age-related differences in the breeding performance of gannets were evident in 1 year of reduced pilchard availability; when food was not limited, both young and experienced parents were equally capable of rearing chicks and had similar levels of breeding success. These data clearly demonstrate the interactive effects of parental age and food supply on breeding performance and suggest that such differences only become apparent when conditions become more stressful.
Language eng
DOI 10.1017/S0952836905006734
Field of Research 050202 Conservation and Biodiversity
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2005, The Zoological Society of London
Persistent URL http://hdl.handle.net/10536/DRO/DU:30003147

Document type: Journal Article
Collection: School of Ecology and Environment
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