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Disruptive viability selection on a black plumage trait associated with dominance

Show simple item record Acker, P Gregoire, A Rat, M Spottiswoode, CN Van Dijk, RE Paquet, M Kaden, JC Pradel, R Hatchwel, BJ Covas, R Doutrelant, C 2018-04-16T12:27:30Z 2018-04-16T12:27:30Z 2015 2015-08-06
dc.identifier.citation Acker, P, Gregoire, A, Rat, M, Spottiswoode, CN, Van Dijk, RE , Paquet, M, Kaden, JC, Pradel, R, Hatchwel, BJ, Covas, R & Doutrelant, C 2015, ‘Disruptive viability selection on a black plumage trait associated with dominance’, Journal of Evolutionary Biology, vol. 28, no.11, pp. 2027-2041, Viewed 16 April 2018, Wiley Online Library, en_US
dc.identifier.issn 1010-061X
dc.description.abstract Traits used in communication, such as colour signals, are expected to have positive consequences for reproductive success, but their associations with survival are little understood. Previous studies have mainly investigated linear relationships between signals and survival, but both hump‐shaped and U‐shaped relationships can also be predicted, depending on the main costs involved in trait expression. Furthermore, few studies have taken the plasticity of signals into account in viability selection analyses. The relationship between signal expression and survival is of particular interest in melanin‐based traits, because their main costs are still debated. Here, we first determined the main factors explaining variability in a melanin‐based trait linked to dominance: the bib size of a colonial bird, the sociable weaver Philetairus socius. We then used these analyses to obtain a measure representative of the individual mean expression of bib size. Finally, we used capture–recapture models to study how survival varied in relation to bib size. Variation in bib size was strongly affected by year and moderately affected by age, body condition and colony size. In addition, individuals bearing small and large bibs had higher survival than those with intermediate bibs, and this U‐shaped relationship between survival and bib size appeared to be more pronounced in some years than others. These results constitute a rare example of disruptive viability selection, and point towards the potential importance of social costs incurred by the dominance signalling function of badges of status. en_US
dc.description.sponsorship National Research Foundation (South Africa) en_US
dc.format 15 p. Tables: ill. (Some col) en_US
dc.format.medium PDF en_US
dc.language.iso en en_US
dc.publisher John Wiley & Sons en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri *
dc.subject Badge of status en_US
dc.subject Fitness en_US
dc.subject Fluctuating selection en_US
dc.subject Capture–recapture en_US
dc.subject Individual variation en_US
dc.subject Longitudinal study en_US
dc.title Disruptive viability selection on a black plumage trait associated with dominance en_US
dc.type Article en_US
dc.rights.holder John Wiley & Sons en_US

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Attribution-NonCommercial-NoDerivs 3.0 United States Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 United States