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Male behaviour drives assortative reproduction during the initial stage of secondary contact.

Heathcote, Robert J P; While, Geoffrey M; MacGregor, Hannah E A; Sciberras, James; Leroy, Chloé; D'Ettorre, Patrizia and Uller, Tobias LU (2016) In Journal of Evolutionary Biology 29(5). p.1003-1015
Abstract
Phenotypic divergence in allopatry can facilitate speciation by reducing the likelihood that individuals of different lineages hybridise during secondary contact. However, few studies have established the causes of reproductive isolation in the crucial early stages of secondary contact. Here we establish behavioural causes of assortative reproduction between two phenotypically divergent lineages of the European wall lizard (Podarcis muralis), which have recently come into secondary contact. Parentage was highly assortative in experimental contact zones. However, despite pronounced divergence in male phenotypes, including chemical and visual sexual signals, there was no evidence that females discriminated between males of the two lineages... (More)
Phenotypic divergence in allopatry can facilitate speciation by reducing the likelihood that individuals of different lineages hybridise during secondary contact. However, few studies have established the causes of reproductive isolation in the crucial early stages of secondary contact. Here we establish behavioural causes of assortative reproduction between two phenotypically divergent lineages of the European wall lizard (Podarcis muralis), which have recently come into secondary contact. Parentage was highly assortative in experimental contact zones. However, despite pronounced divergence in male phenotypes, including chemical and visual sexual signals, there was no evidence that females discriminated between males of the two lineages in staged interactions or under naturalistic free-ranging conditions. Instead, assortative reproduction was driven by male mate preferences and, to a lesser extent, male-male competition. The effects were more pronounced when the habitat structure promoted high lizard densities. These results emphasize that assortative reproduction can occur in the absence of female choice, and that male behaviour may play an important role in limiting hybridisation during the initial stages of secondary contact. This article is protected by copyright. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Evolutionary Biology
volume
29
issue
5
pages
1003 - 1015
publisher
John Wiley & Sons
external identifiers
  • pmid:26848540
  • scopus:84959505582
  • wos:000382498000011
ISSN
1420-9101
DOI
10.1111/jeb.12840
language
English
LU publication?
yes
id
e9f5819f-507c-4825-852f-9965bf7fb770 (old id 8829210)
date added to LUP
2016-03-03 12:05:44
date last changed
2017-11-19 03:20:43
@article{e9f5819f-507c-4825-852f-9965bf7fb770,
  abstract     = {Phenotypic divergence in allopatry can facilitate speciation by reducing the likelihood that individuals of different lineages hybridise during secondary contact. However, few studies have established the causes of reproductive isolation in the crucial early stages of secondary contact. Here we establish behavioural causes of assortative reproduction between two phenotypically divergent lineages of the European wall lizard (Podarcis muralis), which have recently come into secondary contact. Parentage was highly assortative in experimental contact zones. However, despite pronounced divergence in male phenotypes, including chemical and visual sexual signals, there was no evidence that females discriminated between males of the two lineages in staged interactions or under naturalistic free-ranging conditions. Instead, assortative reproduction was driven by male mate preferences and, to a lesser extent, male-male competition. The effects were more pronounced when the habitat structure promoted high lizard densities. These results emphasize that assortative reproduction can occur in the absence of female choice, and that male behaviour may play an important role in limiting hybridisation during the initial stages of secondary contact. This article is protected by copyright. All rights reserved.},
  author       = {Heathcote, Robert J P and While, Geoffrey M and MacGregor, Hannah E A and Sciberras, James and Leroy, Chloé and D'Ettorre, Patrizia and Uller, Tobias},
  issn         = {1420-9101},
  language     = {eng},
  month        = {02},
  number       = {5},
  pages        = {1003--1015},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Evolutionary Biology},
  title        = {Male behaviour drives assortative reproduction during the initial stage of secondary contact.},
  url          = {http://dx.doi.org/10.1111/jeb.12840},
  volume       = {29},
  year         = {2016},
}