Temperature-induced colour change varies seasonally in bearded dragon lizards

Cadena, Viviana, Rankin, Katrina, Smith, Kathleen R., Endler, John A. and Stuart-Fox, Devi 2018, Temperature-induced colour change varies seasonally in bearded dragon lizards, Biological journal of the Linnean Society, vol. 123, no. 2, pp. 422-430, doi: 10.1093/biolinnean/blx152.

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Title Temperature-induced colour change varies seasonally in bearded dragon lizards
Author(s) Cadena, Viviana
Rankin, Katrina
Smith, Kathleen R.
Endler, John A.ORCID iD for Endler, John A. orcid.org/0000-0002-7557-7627
Stuart-Fox, Devi
Journal name Biological journal of the Linnean Society
Volume number 123
Issue number 2
Start page 422
End page 430
Total pages 9
Publisher Oxford University Press
Place of publication Oxford, Eng.
Publication date 2018-01-15
ISSN 0024-4066
1095-8312
Keyword(s) Science & Technology
Life Sciences & Biomedicine
Evolutionary Biology
colour change
lizard
phenotypic plasticity
seasonal variation
signalling
thermoregulation
POGONA-VITTICEPS
BACKGROUND COLOR
ALPHA-MSH
CAMOUFLAGE
TESTOSTERONE
CHAMELEON
HYPOXIA
STRESS
Summary The benefits of colour change are expected to vary seasonally because of changes in reproductive activity, temperature and, potentially, predation risk; yet temporal variation in colour change has seldom been examined. We measured colour change in spring and autumn using captive individuals from two differently coloured populations of the central bearded dragon lizard, Pogona vitticeps. We predicted that colour change should be greater in spring than autumn because of the added requirements of reproductive and territorial activity. To elicit colour change in a standardized way, we placed lizards inside temperature-controlled chambers and measured colour at 15, 25, 35 and 40 °C, repeating experiments in spring and autumn. Lizards from both populations changed from dark grey to light yellowish or orange-brown (increasing luminance and saturation) with increasing temperature in both seasons, and both populations changed colour to a similar extent. As predicted, the maximal extent of temperature-induced colour change (in particular, luminance change) was greater in spring than autumn. Our results confirm that temperatureinduced colour change is greater in the peak activity season, probably an adaptation to the greater thermal and/or signalling needs of that time of year.
Language eng
DOI 10.1093/biolinnean/blx152
Field of Research 06 Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2017, The Linnean Society of London
Persistent URL http://hdl.handle.net/10536/DRO/DU:30108070

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