Selection for social signalling drives the evolution of chameleon colour change.

Rapid colour change is a remarkable natural phenomenon that has evolved in several vertebrate and invertebrate lineages. The two principal explanations for the evolution of this adaptive strategy are (1) natural selection for crypsis (camouflage) against a range of different backgrounds and (2) sele...

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Autores principales:	Devi Stuart-Fox, Adnan Moussalli
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2008
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/e7661204d8474f8da5352a5b5b7db476
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spelling	oai:doaj.org-article:e7661204d8474f8da5352a5b5b7db4762021-11-25T05:33:31ZSelection for social signalling drives the evolution of chameleon colour change.1544-91731545-788510.1371/journal.pbio.0060025https://doaj.org/article/e7661204d8474f8da5352a5b5b7db4762008-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18232740/?tool=EBIhttps://doaj.org/toc/1544-9173https://doaj.org/toc/1545-7885Rapid colour change is a remarkable natural phenomenon that has evolved in several vertebrate and invertebrate lineages. The two principal explanations for the evolution of this adaptive strategy are (1) natural selection for crypsis (camouflage) against a range of different backgrounds and (2) selection for conspicuous social signals that maximise detectability to conspecifics, yet minimise exposure to predators because they are only briefly displayed. Here we show that evolutionary shifts in capacity for colour change in southern African dwarf chameleons (Bradypodion spp.) are associated with increasingly conspicuous signals used in male contests and courtship. To the chameleon visual system, species showing the most dramatic colour change display social signals that contrast most against the environmental background and amongst adjacent body regions. We found no evidence for the crypsis hypothesis, a finding reinforced by visual models of how both chameleons and their avian predators perceive chameleon colour variation. Instead, our results suggest that selection for conspicuous social signals drives the evolution of colour change in this system, supporting the view that transitory display traits should be under strong selection for signal detectability.Devi Stuart-FoxAdnan MoussalliPublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Biology, Vol 6, Iss 1, p e25 (2008)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Devi Stuart-Fox Adnan Moussalli Selection for social signalling drives the evolution of chameleon colour change.
description	Rapid colour change is a remarkable natural phenomenon that has evolved in several vertebrate and invertebrate lineages. The two principal explanations for the evolution of this adaptive strategy are (1) natural selection for crypsis (camouflage) against a range of different backgrounds and (2) selection for conspicuous social signals that maximise detectability to conspecifics, yet minimise exposure to predators because they are only briefly displayed. Here we show that evolutionary shifts in capacity for colour change in southern African dwarf chameleons (Bradypodion spp.) are associated with increasingly conspicuous signals used in male contests and courtship. To the chameleon visual system, species showing the most dramatic colour change display social signals that contrast most against the environmental background and amongst adjacent body regions. We found no evidence for the crypsis hypothesis, a finding reinforced by visual models of how both chameleons and their avian predators perceive chameleon colour variation. Instead, our results suggest that selection for conspicuous social signals drives the evolution of colour change in this system, supporting the view that transitory display traits should be under strong selection for signal detectability.
format	article
author	Devi Stuart-Fox Adnan Moussalli
author_facet	Devi Stuart-Fox Adnan Moussalli
author_sort	Devi Stuart-Fox
title	Selection for social signalling drives the evolution of chameleon colour change.
title_short	Selection for social signalling drives the evolution of chameleon colour change.
title_full	Selection for social signalling drives the evolution of chameleon colour change.
title_fullStr	Selection for social signalling drives the evolution of chameleon colour change.
title_full_unstemmed	Selection for social signalling drives the evolution of chameleon colour change.
title_sort	selection for social signalling drives the evolution of chameleon colour change.
publisher	Public Library of Science (PLoS)
publishDate	2008
url	https://doaj.org/article/e7661204d8474f8da5352a5b5b7db476
work_keys_str_mv	AT devistuartfox selectionforsocialsignallingdrivestheevolutionofchameleoncolourchange AT adnanmoussalli selectionforsocialsignallingdrivestheevolutionofchameleoncolourchange
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Selection for social signalling drives the evolution of chameleon colour change.

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