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    Koala bellows and their association with the spatial dynamics of free-ranging koalas

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    Issue Date
    2011
    Author
    Ellis, William A.
    Bercovitch, Fred B.
    FitzGibbon, S.
    Roe, P.
    Wimmer, J.
    Melzer, A.
    Wilson, R.
    Subject
    KOALAS
    VOCALIZATIONS
    COMMUNICATION
    SOCIAL BEHAVIOR
    SEXUAL BEHAVIOR
    EXPERIMENTAL METHODS
    RESEARCH
    TEMPERATURE
    WIND
    MATING
    BREEDING
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    Journal title
    Behavioral Ecology
    Volume
    22
    Issue
    2
    Begin page
    372
    End page
    377
    
    Metadata
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    DOI
    10.1093/beheco/arq216
    Alternative link
    https://academic.oup.com/beheco/article-lookup/doi/10.1093/beheco/arq216
    Abstract
    Acoustic communication mediates sociality in a variety of animals. One of the more ubiquitous vocal signals to have evolved is the sexual advertisement call of males. Koala (Phascolarctos cinereus) males emit a sonorous bellow call during the breeding season, but no detailed studies of the calling context appear to have been published. We used a novel remote sound detection network to monitor koala bellowing while simultaneously collecting koala behavioral data using collar-mounted GPS units. Our approach enabled us to examine fine scale temporal variation in vocalization and spatial movements of free-ranging koalas without direct behavioral observations. Bellow occurrence was susceptible to weather conditions, with fewer calls occurring when wind speed and temperatures were high. The number of bellow vocalizations recorded during an annual period mirrored breeding activity, with nearly all male bellows recorded during peak mating season. The distance traveled by koalas and the occurrence of koala bellows both peaked around midnight, but only female travel distance during the breeding season was temporally correlated with bellow occurrence. We conclude that environmental factors might trigger male bellowing to launch the breeding season and that these male vocal signals function more to attract females than to repel males. Female mate selection is probably an important component of male reproductive success in koalas, which is partly mediated by male bellow characteristics.
    URI
    http://hdl.handle.net/20.500.12634/842
    Type
    Article
    Rights
    Copyright The Author 2011. Published by Oxford University Press on behalf of the International Society for Behavioral Ecology. All rights reserved.
    ae974a485f413a2113503eed53cd6c53
    10.1093/beheco/arq216
    Scopus Count
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    SDZWA Research Publications

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