Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/21247
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Título : Bottoms up: great bustards use the sun to maximise signal efficacy
Autor : Olea, Pedro P., Casas, Fabián, Redpath, Steve, Viñuela, Javier
Palabras clave : Animal communication
Courtship
Otis tarda
White plumage
Fecha de publicación : 8-Feb-2010
Editor: Springer
Citación : Behavioral Ecology and Sociobiology
Resumen: Visual displays are signals that may be selected to increase visibility. Light is a crucial component in the transmission of visual signals, and white colour is very conspicuous when illuminated by sun and exhibited against darker backgrounds. Here we tested the hypothesis that orientation of sexual displays in male great bustard (Otis tarda) depends upon position of the sun, i.e., males direct their uplifted white tails towards the sun in order to maximise signal detectability to distant females. We recorded the orientation of 405 male displays in relation to the sun and to females at seven leks. Great bustard males signalled towards the sun more often than expected by chance in early morning, although this pattern was not obvious at other times of day, when males displayed more towards females. Our hypothesis was further supported by the fact that displays were more directed towards the sun when the sun was most visible. Males were more likely to direct their displays towards females during the most elaborate components of their courtship display and when there were fewer males on the lek. Pointing white plumage to the sun may be a behaviour selected in species living in steppe-like open landscapes if individuals obtain net fitness benefit by increasing the likelihood of mating.
Versión del editor: http://dx.doi.org/10.1007/s00265-010-0908-1
URI : http://hdl.handle.net/10261/21247
ISSN: 0340-5443 (Print)
1432-0762 (Online)
DOI: 10.1007/s00265-010-0908-1
Citación : Behavioral Ecology and Sociobiology
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