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Digit ratio, polychromatism and associations with endurance and antipredator behaviour in male painted dragon lizards

Tobler, Michael LU ; Healey, Mo and Olsson, Mats (2012) In Animal Behaviour 84(5). p.1261-1269
Abstract
Variation in sex hormone exposure during early embryonic development contributes to individual differences in behaviour and cognitive abilities later in life. Digit ratio has gained considerable interest as a putative marker for early androgen/oestrogen exposure in behavioural ecology research. Studying digit ratio in nonhuman laboratory as well as wild vertebrate species may be useful to assess whether different traits may be influenced by a common (e. g. endocrine-related) mechanism and whether digit ratio might be used as a phenotypic indicator for behavioural or fitness-related traits. We examined whether digit ratio (third-to-fourth toe ratio; 3D:4D) may indicate a common mechanism underlying endurance and antipredator behaviour in... (More)
Variation in sex hormone exposure during early embryonic development contributes to individual differences in behaviour and cognitive abilities later in life. Digit ratio has gained considerable interest as a putative marker for early androgen/oestrogen exposure in behavioural ecology research. Studying digit ratio in nonhuman laboratory as well as wild vertebrate species may be useful to assess whether different traits may be influenced by a common (e. g. endocrine-related) mechanism and whether digit ratio might be used as a phenotypic indicator for behavioural or fitness-related traits. We examined whether digit ratio (third-to-fourth toe ratio; 3D:4D) may indicate a common mechanism underlying endurance and antipredator behaviour in male painted dragon lizards, Ctenophorus pictus. We have previously shown that 3D:4D is associated with the presence/absence of a yellow throat patch (bib), with males with bibs having higher 3D:4D than those without bibs. In this study we found that 3D: 4D predicted antipredator behaviour with individuals with higher 3D:4D having shorter escape response times; however, 3D:4D was not associated with endurance. Endurance and antipredator behaviour were also associated with male coloration. Males expressing a bib had shorter escape response times and lower endurance than those without a bib. Moreover, males with orange head colour had lower endurance compared to yellow-headed and uncoloured males. On the basis of these results, we speculate that the associations between antipredator behaviour, endurance, 3D:4D and male sexual coloration are caused, at least partly, by different underlying mechanisms. (C) 2012 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved. (Less)
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organization
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Contribution to journal
publication status
published
subject
keywords
androgen, antipredator behaviour, colour polymorphism, Ctenophorus, pictus, digit ratio, endurance, oestrogen, painted dragon, prenatal
in
Animal Behaviour
volume
84
issue
5
pages
1261 - 1269
publisher
Elsevier
external identifiers
  • wos:000311571300024
  • scopus:84867739936
ISSN
1095-8282
DOI
10.1016/j.anbehav.2012.09.009
language
English
LU publication?
yes
id
74a650d4-8389-491d-a96e-4446df125602 (old id 3373227)
date added to LUP
2013-01-31 11:17:19
date last changed
2017-04-02 03:20:15
@article{74a650d4-8389-491d-a96e-4446df125602,
  abstract     = {Variation in sex hormone exposure during early embryonic development contributes to individual differences in behaviour and cognitive abilities later in life. Digit ratio has gained considerable interest as a putative marker for early androgen/oestrogen exposure in behavioural ecology research. Studying digit ratio in nonhuman laboratory as well as wild vertebrate species may be useful to assess whether different traits may be influenced by a common (e. g. endocrine-related) mechanism and whether digit ratio might be used as a phenotypic indicator for behavioural or fitness-related traits. We examined whether digit ratio (third-to-fourth toe ratio; 3D:4D) may indicate a common mechanism underlying endurance and antipredator behaviour in male painted dragon lizards, Ctenophorus pictus. We have previously shown that 3D:4D is associated with the presence/absence of a yellow throat patch (bib), with males with bibs having higher 3D:4D than those without bibs. In this study we found that 3D: 4D predicted antipredator behaviour with individuals with higher 3D:4D having shorter escape response times; however, 3D:4D was not associated with endurance. Endurance and antipredator behaviour were also associated with male coloration. Males expressing a bib had shorter escape response times and lower endurance than those without a bib. Moreover, males with orange head colour had lower endurance compared to yellow-headed and uncoloured males. On the basis of these results, we speculate that the associations between antipredator behaviour, endurance, 3D:4D and male sexual coloration are caused, at least partly, by different underlying mechanisms. (C) 2012 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.},
  author       = {Tobler, Michael and Healey, Mo and Olsson, Mats},
  issn         = {1095-8282},
  keyword      = {androgen,antipredator behaviour,colour polymorphism,Ctenophorus,pictus,digit ratio,endurance,oestrogen,painted dragon,prenatal},
  language     = {eng},
  number       = {5},
  pages        = {1261--1269},
  publisher    = {Elsevier},
  series       = {Animal Behaviour},
  title        = {Digit ratio, polychromatism and associations with endurance and antipredator behaviour in male painted dragon lizards},
  url          = {http://dx.doi.org/10.1016/j.anbehav.2012.09.009},
  volume       = {84},
  year         = {2012},
}