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Sexual dimorphism in lizard body shape: The roles of sexual selection and fecundity selection

Olsson, M; Shine, R; Wapstra, E; Ujvari, Beata LU and Madsen, Thomas LU (2002) In Evolution 56(7). p.1538-1542
Abstract
Sexual dimorphism is widespread in lizards, with the most consistently dimorphic traits being head size (males have larger heads) and trunk length (the distance between the front and hind legs is greater in females). These dimorphisms have generally been interpreted as follows: (1) large heads in males evolve through male-male rivalry (sexual selection); and (2) larger interlimb lengths in females provide space for more eggs (fecundity selection). In an Australian lizard (the snow skink, Niveoscincus microlepidotus), we found no evidence for ongoing selection on head size. Trunk length, however, was under positive fecundity selection in females and under negative sexual selection in males. Thus, fecundity selection and sexual selection... (More)
Sexual dimorphism is widespread in lizards, with the most consistently dimorphic traits being head size (males have larger heads) and trunk length (the distance between the front and hind legs is greater in females). These dimorphisms have generally been interpreted as follows: (1) large heads in males evolve through male-male rivalry (sexual selection); and (2) larger interlimb lengths in females provide space for more eggs (fecundity selection). In an Australian lizard (the snow skink, Niveoscincus microlepidotus), we found no evidence for ongoing selection on head size. Trunk length, however, was under positive fecundity selection in females and under negative sexual selection in males. Thus, fecundity selection and sexual selection work in concert to drive the evolution of sexual dimorphism in trunk length in snow skinks. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Evolution
volume
56
issue
7
pages
1538 - 1542
publisher
Wiley-Blackwell
external identifiers
  • pmid:12206252
  • wos:000177434400020
  • scopus:0036344459
ISSN
1558-5646
language
English
LU publication?
yes
id
3492f5a2-4051-417f-982d-6e8e3532dd31 (old id 145534)
date added to LUP
2007-06-25 10:53:05
date last changed
2017-10-22 04:31:19
@article{3492f5a2-4051-417f-982d-6e8e3532dd31,
  abstract     = {Sexual dimorphism is widespread in lizards, with the most consistently dimorphic traits being head size (males have larger heads) and trunk length (the distance between the front and hind legs is greater in females). These dimorphisms have generally been interpreted as follows: (1) large heads in males evolve through male-male rivalry (sexual selection); and (2) larger interlimb lengths in females provide space for more eggs (fecundity selection). In an Australian lizard (the snow skink, Niveoscincus microlepidotus), we found no evidence for ongoing selection on head size. Trunk length, however, was under positive fecundity selection in females and under negative sexual selection in males. Thus, fecundity selection and sexual selection work in concert to drive the evolution of sexual dimorphism in trunk length in snow skinks.},
  author       = {Olsson, M and Shine, R and Wapstra, E and Ujvari, Beata and Madsen, Thomas},
  issn         = {1558-5646},
  language     = {eng},
  number       = {7},
  pages        = {1538--1542},
  publisher    = {Wiley-Blackwell},
  series       = {Evolution},
  title        = {Sexual dimorphism in lizard body shape: The roles of sexual selection and fecundity selection},
  volume       = {56},
  year         = {2002},
}