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    Simultaneous DNA-based diet analysis of breeding, non-breeding and chick Adélie penguins

    Access Status
    Fulltext not available
    Authors
    McInnes, J.
    Emmerson, L.
    Southwell, C.
    Faux, C.
    Jarman, Simon
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    McInnes, J. and Emmerson, L. and Southwell, C. and Faux, C. and Jarman, S. 2016. Simultaneous DNA-based diet analysis of breeding, non-breeding and chick Adélie penguins. Royal Society Open Science. 3 (1).
    Source Title
    Royal Society Open Science
    DOI
    10.1098/rsos.150443
    ISSN
    2054-5703
    School
    School of Molecular and Life Sciences (MLS)
    URI
    http://hdl.handle.net/20.500.11937/73027
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 The Authors. As central place foragers, breeding penguins are restricted in foraging range by the need to return to the colony to feed chicks. Furthermore, breeding birds must balance energetic gain from self-feeding with the costs of returning to provision young. Non-breeding birds, however, are likely to be less restricted in foraging range and lack the high energy demands of provisioning, therefore may consume different prey to breeders. We used DNA dietary analysis to determine whether there was a difference in provisioning and self-feeding diet by identifying prey DNA in scat samples from breeding and chick Adélie penguins at two locations in East Antarctica. We also investigated diet differences between breeders and non-breeders at one site. Although previous work shows changing foraging behaviour between chick provisioning and self-feeding, our results suggest no significant differences in the main prey groups consumed by chicks and breeders at either site or between breeding stages. This may reflect the inability of penguins to selectively forage when provisioning, or resources were sufficient for all foraging needs. Conversely, non-breeders were found to consume different prey groups to breeders, which may reflect less restricted foraging ranges, breeders actively selecting particular prey during breeding or reduced foraging experience of non-breeders.

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