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Factors affecting the site of investment, and the reliance on savings for arctic breeders : the capital–income dichotomy revisited

Klaassen, Marcel, Abraham, Kenneth F., Jefferies, Robert L. and Vrtiska, Mark 2006, Factors affecting the site of investment, and the reliance on savings for arctic breeders : the capital–income dichotomy revisited, Ardea, vol. 94, no. 3, pp. 371-384.

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Title Factors affecting the site of investment, and the reliance on savings for arctic breeders : the capital–income dichotomy revisited
Author(s) Klaassen, MarcelORCID iD for Klaassen, Marcel orcid.org/0000-0003-3907-9599
Abraham, Kenneth F.
Jefferies, Robert L.
Vrtiska, Mark
Journal name Ardea
Volume number 94
Issue number 3
Start page 371
End page 384
Total pages 14
Publisher Nederlandse Ornithlogische Unie
Place of publication Amsterdam, The Netherlands
Publication date 2006
ISSN 0373-2266
Keyword(s) capital and income breeders
body size
fat
protein
interannual and intra-specific variation in arrival and egg-laying dates
Summary The extent to which migratory birds that breed in the Arctic and winter in southern biomes rely on residual body stores for reproduction is unresolved. The short arctic summer and the limited availability of food early in the season constrain the time available for successful reproduction. Birds that are able to bring sufficient endogenous reserves to the breeding ground to meet, at least partially, the demands of egg-laying can initiate clutch production soon after arrival, thereby shortening the length of the breeding season and improving the chances of reproductive success. The amount of reserves available will be influenced by body size, the increased energetic and predation costs associated with carrying large stores, distances between staging sites and the location of the breeding grounds within the Arctic. Birds need not fly directly to the breeding grounds from the established temperate staging sites. Extensive feeding by migrants may occur in the Arctic, even within a few kilometres of the breeding sites as the birds track the retreating snowline. Irrespective of their size, birds are thus able to store some resources necessary for egg laying at local or regional scales. It is thus important to make a distinction between local capital and distant capital breeding. The extent to which a bird is characterized as a distant capital, local capital, or an income breeder not only varies between species, but also between individuals and seasons.
Notes Reproduced with the kind permission of the copyright owner.
Language eng
Field of Research 060201 Behavioural Ecology
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2006, Nederlandse Ornithlogische Unie
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30035109

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.