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Preliminary investigation of the costs of incubation in the Australasian Gannet (Morus serrator) breeding in Port Phillip Bay, Victoria

Ewing, A., Norman, F., Ward, S. and Bunce, Ashley 2005, Preliminary investigation of the costs of incubation in the Australasian Gannet (Morus serrator) breeding in Port Phillip Bay, Victoria, Emu, vol. 105, no. 2, pp. 137-144, doi: 10.1071/MU03061.

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Title Preliminary investigation of the costs of incubation in the Australasian Gannet (Morus serrator) breeding in Port Phillip Bay, Victoria
Formatted title Preliminary investigation of the costs of incubation in the Australasian Gannet (Morus serrator) breeding in Port Phillip Bay, Victoria
Author(s) Ewing, A.
Norman, F.
Ward, S.
Bunce, Ashley
Journal name Emu
Volume number 105
Issue number 2
Start page 137
End page 144
Publisher Royal Australasian Ornithologists' Union
Place of publication Melbourne, Vic.
Publication date 2005
ISSN 0158-4197
1448-5540
Summary To optimise lifetime reproductive success, individuals must balance current reproductive effort against future reproductive prospects. In birds, incubation and chick-rearing must involve costs, and manipulation of the length of incubation offers an insight into some costs affecting adults. An experiment was conducted at a colony of Australasian Gannets in Port Phillip Bay, Victoria, in which length of incubation was manipulated so that some adults experienced short (10–20 days duration), long (70–80 days) or normal (~45 days) incubation periods. Adults with a manipulated incubation period did not show significant differences in weight change (taken here to reflect cost) during incubation or chick-rearing compared with controls. Manipulation of length of incubation did not significantly affect the hatching success or the growth rate of chicks involved and is not, therefore considered to impose an increased reproductive cost. This suggests that the Australasian Gannet has the capacity to maintain body condition and successfully rear young despite modified duration of incubation.
Language eng
DOI 10.1071/MU03061
Field of Research 050202 Conservation and Biodiversity
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2005, Royal Australasian Ornithologists Union
Persistent URL http://hdl.handle.net/10536/DRO/DU:30008841

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