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Differential rates of offspring provisioning in Gould’s petrels: are better feeders better breeders?

O'Dwyer, Terence W., Buttemer, William A. and Priddel, David M. 2007, Differential rates of offspring provisioning in Gould’s petrels: are better feeders better breeders?, Australian journal of zoology, vol. 55, no. 3, pp. 155-160, doi: 10.1071/ZO07005.

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Title Differential rates of offspring provisioning in Gould’s petrels: are better feeders better breeders?
Author(s) O'Dwyer, Terence W.
Buttemer, William A.
Priddel, David M.
Journal name Australian journal of zoology
Volume number 55
Issue number 3
Start page 155
End page 160
Publisher CSIRO Publishing
Place of publication Collingwood, Vic.
Publication date 2007
ISSN 0004-959X
1446-5698
Summary Procellariiformes (albatrosses and petrels) must accumulate substantial energy reserves to sustain them while incubating their single egg. They then produce a chick that is often more than 130% of their own body mass. Thus, despite the variable nature of resource availability in the marine environment, successful reproduction requires a considerable increase in foraging rates. Birds that are better foragers are, therefore, likely to be better parents. As surrogates of foraging ability, we assessed two parental traits that are separated temporally over the breeding season, body condition during incubation and provisioning performance, in Gould’s petrel (Pterodroma leucoptera). Although parental condition did not influence hatching success, we found significant positive correlations between the average body condition of a breeding pair and both the growth rate of chicks (g day–1) and the body condition of chicks at peak mass. Provisioning rate also correlated positively with chick condition. Chick condition was positively correlated with haemoglobin concentration [Hb] at peak mass, which was positively correlated with [Hb] at fledging. Because the probability of survival after fledging may be influenced by chick body condition and [Hb], the ability of parents to acquire additional resources for breeding is likely to be an important determinant of reproductive success.
Language eng
DOI 10.1071/ZO07005
Field of Research 060299 Ecology not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, CSIRO
Persistent URL http://hdl.handle.net/10536/DRO/DU:30020907

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