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Laying date and laying sequence influence the sex ratio of crimson rosella broods

Krebs, Elizabeth; Green, David; Double, Michael; Griffiths, Richard E


We examine the patterns of sex allocation in crimson rosellas Platycercus elegans, a socially monogamous Australian parrot. Overall, 41.8% of nestlings were male, a significant female bias. However underlying this population-level bias were non-random patterns of sex allocation within broods. Broods produced early in the season were female-biased, but the proportion of males in a brood increased as the breeding season progressed. Female rosellas may obtain greater fitness benefits from...[Show more]

CollectionsANU Research Publications
Date published: 2002
Type: Journal article
Source: Behavioral Ecology and Sociobiology
DOI: 10.1007/s00265-002-0459-1


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02_Krebs_Laying_date_and_laying_2002.pdf72.69 kBAdobe PDF    Request a copy

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