Seasonal Variation in the Size of the Gular Lobe of a Male Musk Duck 'Biziura lobata'

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Cowling, Mary and Guay, Patrick-Jean (2011) Seasonal Variation in the Size of the Gular Lobe of a Male Musk Duck 'Biziura lobata'. Australian Field Ornithology, 28 (2). pp. 88-91. ISSN 1448-0107


The Musk Duck Biziura lobata possesses elaborate secondary sexual traits that are not present among other ducks and include a leathery lobe attached at the base of the lower mandible of the male, which is thought to become larger at certain times of the year. To establish the extent of this seasonal variation, a captive male Musk Duck was photographed each month for a period of 16 months. Quantitative analysis of the photographs demonstrated seasonal variation in the area of the lobe, with an almost threefold difference between the smallest and largest measurement. Reasons for this variation are discussed.

Item type Article
Subjects Historical > FOR Classification > 0608 Zoology
Historical > SEO Classification > 9608 Flora, Fauna and Biodiversity
Historical > Faculty/School/Research Centre/Department > Institute for Sustainability and Innovation (ISI)
Keywords ResPubID22958, ResPubID23020, Musk Duck Biziura lobata, sexual behavior, Australian waterfowl
Citations in Scopus 0 - View on Scopus
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