No survival costs for sexually selected traits in a polygynous non-territorial lizard

No survival costs for sexually selected traits in a polygynous non-territorial lizard

Author Guimaraes, Murilo Google Scholar
Munguia-Steyer, Roberto Google Scholar
Doherty, Paul F., Jr. Google Scholar
Sawaya, Ricardo J. Autor UNIFESP Google Scholar
Abstract Polygyny is a common mating system in lizards. In polygynous species, males usually display status badges and use weaponry to prevent reproductive access of competitors to mates. Such secondary sexual traits are frequently linked to signalling costs and the handicap principle is widely used to explain the potential reduction of fitness components. Here, we (1) evaluate the allometric relationship of two known secondary sexual traits with body size: head width (a weapon) and the total coloured lateral area (an ornament), (2) assess the effects of such traits on male and female survival probabilities and (3) evaluate patterns of linear and quadratic selection of both traits for the whiptail lizard Cnemidophorus cf. ocellifer. We detected evidence of sexual dimorphism in both traits, but contrary to our expectations, both sexes presented hyperallometric growth of both weapon size and badge size. We found no support for the handicap principle since no detrimental effects of secondary sexual traits were found on individual survival probability. Furthermore, no evidence of directional selection, neither stabilizing nor disruptive selection was found. The costs of faking signals in male animal contests could maintain the honesty, as previously suggested.
Keywords allometry
selection gradients
sexual dimorphism
sexual selection
xmlui.dri2xhtml.METS-1.0.item-coverage Oxford
Language English
Sponsor Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior
Conselho Nacional de Desenvolvimento Cientifico e Tecnologico
PAPIIT-UNAM |Fundacao de Amparo a Pesquisa do estado de Sao Paulo
Ecology Graduate Program of UNICAMP
Grant number CAPES: 229611-0
CNPq: 140684/2009-3
CNPq: 309229/2009-0
FAPESP: 2008/54472-2
Date 2017
Published in Biological Journal Of The Linnean Society. Oxford, v. 122, n. 3, p. 614-626, 2017.
ISSN 0024-4066 (Sherpa/Romeo, impact factor)
Publisher Oxford Univ Press
Extent 614-626
Access rights Closed access
Type Article
Web of Science ID WOS:000417321300010

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