Koala bellows and their association with the spatial dynamics of free-ranging koalas
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Date Issued
2011Subject Terms
KOALASVOCALIZATIONS
COMMUNICATION
SOCIAL BEHAVIOR
SEXUAL BEHAVIOR
EXPERIMENTAL METHODS
RESEARCH
TEMPERATURE
WIND
MATING
BREEDING
Journal
Behavioral EcologyVolume
22Issue
2Start page
372End page
377
Metadata
Show full item recordAbstract
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.Type
ArticleRights
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
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