Cyclic colour change in the bearded dragon Pogona vitticeps under different photoperiods.

The ability to change colour rapidly is widespread among ectotherms and has various functions including camouflage, communication and thermoregulation. The process of colour change can occur as an aperiodic event or be rhythmic, induced by cyclic environmental factors or regulated by internal oscill...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Marie Fan, Devi Stuart-Fox, Viviana Cadena
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e82bc5307b9e4c00970ea19656b27282
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:e82bc5307b9e4c00970ea19656b27282
record_format	dspace
spelling	oai:doaj.org-article:e82bc5307b9e4c00970ea19656b272822021-11-25T05:55:07ZCyclic colour change in the bearded dragon Pogona vitticeps under different photoperiods.1932-620310.1371/journal.pone.0111504https://doaj.org/article/e82bc5307b9e4c00970ea19656b272822014-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0111504https://doaj.org/toc/1932-6203The ability to change colour rapidly is widespread among ectotherms and has various functions including camouflage, communication and thermoregulation. The process of colour change can occur as an aperiodic event or be rhythmic, induced by cyclic environmental factors or regulated by internal oscillators. Despite the importance of colour change in reptile ecology, few studies have investigated the occurrence of a circadian rhythm in lizard pigmentation. Additionally, although colour change also entails changes in near-infrared reflectance, which may affect thermoregulation, little research has examined this part of the spectrum. We tested whether the bearded dragon lizard, Pogona vitticeps, displays an endogenous circadian rhythm in pigmentation changes that could be entrained by light/dark (LD) cycles and how light affected the relative change in reflectance in both ultraviolet-visible and near-infrared spectra. We subjected 11 lizards to four photoperiodic regimens: LD 12:12; LD 6:18; LD 18:6 and DD; and measured their dorsal skin reflectance at 3-hour intervals for 72 hours after a habituation period. A proportion of lizards displayed a significant rhythm under constant darkness, with maximum reflectance occurring in the subjective night. This endogenous rhythm synchronised to the different artificial LD cycles, with maximum reflectance occurring during dark phases, but did not vary in amplitude. In addition, the total ultraviolet-visible reflectance in relation to the total near-infrared reflectance was significantly higher during dark phases than during light phases. We conclude that P. vitticeps exhibits a circadian pigmentation rhythm of constant amplitude, regulated by internal oscillators and that can be entrained by light/dark cycles.Marie FanDevi Stuart-FoxViviana CadenaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 10, p e111504 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Marie Fan Devi Stuart-Fox Viviana Cadena Cyclic colour change in the bearded dragon Pogona vitticeps under different photoperiods.
description	The ability to change colour rapidly is widespread among ectotherms and has various functions including camouflage, communication and thermoregulation. The process of colour change can occur as an aperiodic event or be rhythmic, induced by cyclic environmental factors or regulated by internal oscillators. Despite the importance of colour change in reptile ecology, few studies have investigated the occurrence of a circadian rhythm in lizard pigmentation. Additionally, although colour change also entails changes in near-infrared reflectance, which may affect thermoregulation, little research has examined this part of the spectrum. We tested whether the bearded dragon lizard, Pogona vitticeps, displays an endogenous circadian rhythm in pigmentation changes that could be entrained by light/dark (LD) cycles and how light affected the relative change in reflectance in both ultraviolet-visible and near-infrared spectra. We subjected 11 lizards to four photoperiodic regimens: LD 12:12; LD 6:18; LD 18:6 and DD; and measured their dorsal skin reflectance at 3-hour intervals for 72 hours after a habituation period. A proportion of lizards displayed a significant rhythm under constant darkness, with maximum reflectance occurring in the subjective night. This endogenous rhythm synchronised to the different artificial LD cycles, with maximum reflectance occurring during dark phases, but did not vary in amplitude. In addition, the total ultraviolet-visible reflectance in relation to the total near-infrared reflectance was significantly higher during dark phases than during light phases. We conclude that P. vitticeps exhibits a circadian pigmentation rhythm of constant amplitude, regulated by internal oscillators and that can be entrained by light/dark cycles.
format	article
author	Marie Fan Devi Stuart-Fox Viviana Cadena
author_facet	Marie Fan Devi Stuart-Fox Viviana Cadena
author_sort	Marie Fan
title	Cyclic colour change in the bearded dragon Pogona vitticeps under different photoperiods.
title_short	Cyclic colour change in the bearded dragon Pogona vitticeps under different photoperiods.
title_full	Cyclic colour change in the bearded dragon Pogona vitticeps under different photoperiods.
title_fullStr	Cyclic colour change in the bearded dragon Pogona vitticeps under different photoperiods.
title_full_unstemmed	Cyclic colour change in the bearded dragon Pogona vitticeps under different photoperiods.
title_sort	cyclic colour change in the bearded dragon pogona vitticeps under different photoperiods.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/e82bc5307b9e4c00970ea19656b27282
work_keys_str_mv	AT mariefan cycliccolourchangeinthebeardeddragonpogonavitticepsunderdifferentphotoperiods AT devistuartfox cycliccolourchangeinthebeardeddragonpogonavitticepsunderdifferentphotoperiods AT vivianacadena cycliccolourchangeinthebeardeddragonpogonavitticepsunderdifferentphotoperiods
_version_	1718414433423720448

Cyclic colour change in the bearded dragon Pogona vitticeps under different photoperiods.

Ejemplares similares