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Multivariate phenotypes and the potential for alternative phenotypic optima in wall lizard (Podarcis muralis) ventral colour morphs

Calsbeek, B.; Hasselquist, Dennis LU and Clobert, J. (2010) In Journal of Evolutionary Biology 23(6). p.1138-1147
Abstract
A major goal in evolutionary biology is to determine how phenotypic variation arises and is maintained in natural populations. Recent studies examining the morphological, physiological and behavioural differences among discrete colour morphotypes (morphs) have revealed several mechanisms that maintain discrete variation within populations, including frequency-dependence, density-dependence and correlational selection. For example, trade-offs over resource allocation to morphological, physiological and behavioural traits can drive correlational selection for morph-specific phenotypic optima. Here, we describe a ventral colour polymorphism in the wall lizard (Podarcis muralis) and test the hypothesis that morphs differ along multivariate... (More)
A major goal in evolutionary biology is to determine how phenotypic variation arises and is maintained in natural populations. Recent studies examining the morphological, physiological and behavioural differences among discrete colour morphotypes (morphs) have revealed several mechanisms that maintain discrete variation within populations, including frequency-dependence, density-dependence and correlational selection. For example, trade-offs over resource allocation to morphological, physiological and behavioural traits can drive correlational selection for morph-specific phenotypic optima. Here, we describe a ventral colour polymorphism in the wall lizard (Podarcis muralis) and test the hypothesis that morphs differ along multivariate axes defined by trade-offs in morphological, physiological, and immunological traits. We show that ventral colour is a discrete trait and that morphs differ in body size, prevalence of infection by parasites and infection intensity. We also find that morphs differ along multivariate phenotypic axes and experience different multivariate selection pressures. Our results suggest that multivariate selection pressures may favour alternative optimal morph-specific phenotypes in P. muralis. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
polymorphism, colour signals, fitness optima, alternative strategies, selection
in
Journal of Evolutionary Biology
volume
23
issue
6
pages
1138 - 1147
publisher
John Wiley & Sons
external identifiers
  • wos:000277710100003
  • scopus:77954056922
ISSN
1420-9101
DOI
10.1111/j.1420-9101.2010.01978.x
language
English
LU publication?
yes
id
cb57e90a-651a-4957-bc64-12bb35b51bf7 (old id 1617776)
date added to LUP
2010-06-21 10:56:07
date last changed
2018-05-29 10:11:37
@article{cb57e90a-651a-4957-bc64-12bb35b51bf7,
  abstract     = {A major goal in evolutionary biology is to determine how phenotypic variation arises and is maintained in natural populations. Recent studies examining the morphological, physiological and behavioural differences among discrete colour morphotypes (morphs) have revealed several mechanisms that maintain discrete variation within populations, including frequency-dependence, density-dependence and correlational selection. For example, trade-offs over resource allocation to morphological, physiological and behavioural traits can drive correlational selection for morph-specific phenotypic optima. Here, we describe a ventral colour polymorphism in the wall lizard (Podarcis muralis) and test the hypothesis that morphs differ along multivariate axes defined by trade-offs in morphological, physiological, and immunological traits. We show that ventral colour is a discrete trait and that morphs differ in body size, prevalence of infection by parasites and infection intensity. We also find that morphs differ along multivariate phenotypic axes and experience different multivariate selection pressures. Our results suggest that multivariate selection pressures may favour alternative optimal morph-specific phenotypes in P. muralis.},
  author       = {Calsbeek, B. and Hasselquist, Dennis and Clobert, J.},
  issn         = {1420-9101},
  keyword      = {polymorphism,colour signals,fitness optima,alternative strategies,selection},
  language     = {eng},
  number       = {6},
  pages        = {1138--1147},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Evolutionary Biology},
  title        = {Multivariate phenotypes and the potential for alternative phenotypic optima in wall lizard (Podarcis muralis) ventral colour morphs},
  url          = {http://dx.doi.org/10.1111/j.1420-9101.2010.01978.x},
  volume       = {23},
  year         = {2010},
}