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    Sex-specific dive characteristics in a sexually size dimorphic duck

    Access Status
    Fulltext not available
    Authors
    Osterrieder, Sylvia
    Weston, M.
    Robinson, R.
    Guay, P.
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Osterrieder, S. and Weston, M. and Robinson, R. and Guay, P. 2014. Sex-specific dive characteristics in a sexually size dimorphic duck. Wildfowl. 64: pp. 126-131.
    Source Title
    Wildfowl
    ISSN
    0954-6324
    School
    Centre for Marine Science and Technology
    URI
    http://hdl.handle.net/20.500.11937/51979
    Collection
    • Curtin Research Publications
    Abstract

    © Wildfowl & Wetlands TrustDive duration generally increases with body size in animals including wildfowl. Therefore, diving behaviour may vary between the sexes in sexually size dimorphic species, such as the extremely sexually size dimorphic Musk Duck Biziura lobata. However, a previous study reports longer dives in the smaller sex (females) when breeding. In this study, non-breeding male Musk Ducks dived for significantly longer periods than females and tended to have longer inter-dive intervals, conforming to the general patterns described for other species. The differences in dive behaviour we describe may be explained by niche partitioning or differential oxygen requirements or uptake rates by the sexes.

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