Cargando…

Divergent male and female mate preferences do not explain incipient speciation between lizard lineages

Diversification in sexual signals is often taken as evidence for the importance of sexual selection in speciation. However, in order for sexual selection to generate reproductive isolation between populations, both signals and mate preferences must diverge together. Furthermore, assortative mating m...

Descripción completa

Detalles Bibliográficos
Autores principales: McLean, Claire A, Bartle, Richard A, Dong, Caroline M, Rankin, Katrina J, Stuart-Fox, Devi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7705505/
https://www.ncbi.nlm.nih.gov/pubmed/33293929
http://dx.doi.org/10.1093/cz/zoaa010
_version_ 1783616967095091200
author McLean, Claire A
Bartle, Richard A
Dong, Caroline M
Rankin, Katrina J
Stuart-Fox, Devi
author_facet McLean, Claire A
Bartle, Richard A
Dong, Caroline M
Rankin, Katrina J
Stuart-Fox, Devi
author_sort McLean, Claire A
collection PubMed
description Diversification in sexual signals is often taken as evidence for the importance of sexual selection in speciation. However, in order for sexual selection to generate reproductive isolation between populations, both signals and mate preferences must diverge together. Furthermore, assortative mating may result from multiple behavioral mechanisms, including female mate preferences, male mate preferences, and male–male competition; yet their relative contributions are rarely evaluated. Here, we explored the role of mate preferences and male competitive ability as potential barriers to gene flow between 2 divergent lineages of the tawny dragon lizard, Ctenophorus decresii, which differ in male throat coloration. We found stronger behavioral barriers to pairings between southern lineage males and northern lineage females than between northern males and southern females, indicating incomplete and asymmetric behavioral isolating barriers. These results were driven by both male and female mate preferences rather than lineage differences in male competitive ability. Intrasexual selection is therefore unlikely to drive the outcome of secondary contact in C. decresii, despite its widely acknowledged importance in lizards. Our results are consistent with the emerging view that although both male and female mate preferences can diverge alongside sexual signals, speciation is rarely driven by divergent sexual selection alone.
format Online
Article
Text
id pubmed-7705505
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Oxford University Press
record_format MEDLINE/PubMed
spelling pubmed-77055052020-12-07 Divergent male and female mate preferences do not explain incipient speciation between lizard lineages McLean, Claire A Bartle, Richard A Dong, Caroline M Rankin, Katrina J Stuart-Fox, Devi Curr Zool Articles Diversification in sexual signals is often taken as evidence for the importance of sexual selection in speciation. However, in order for sexual selection to generate reproductive isolation between populations, both signals and mate preferences must diverge together. Furthermore, assortative mating may result from multiple behavioral mechanisms, including female mate preferences, male mate preferences, and male–male competition; yet their relative contributions are rarely evaluated. Here, we explored the role of mate preferences and male competitive ability as potential barriers to gene flow between 2 divergent lineages of the tawny dragon lizard, Ctenophorus decresii, which differ in male throat coloration. We found stronger behavioral barriers to pairings between southern lineage males and northern lineage females than between northern males and southern females, indicating incomplete and asymmetric behavioral isolating barriers. These results were driven by both male and female mate preferences rather than lineage differences in male competitive ability. Intrasexual selection is therefore unlikely to drive the outcome of secondary contact in C. decresii, despite its widely acknowledged importance in lizards. Our results are consistent with the emerging view that although both male and female mate preferences can diverge alongside sexual signals, speciation is rarely driven by divergent sexual selection alone. Oxford University Press 2020-10 2020-03-12 /pmc/articles/PMC7705505/ /pubmed/33293929 http://dx.doi.org/10.1093/cz/zoaa010 Text en © The Author(s) (2020). Published by Oxford University Press on behalf of Editorial Office, Current Zoology. http://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
spellingShingle Articles
McLean, Claire A
Bartle, Richard A
Dong, Caroline M
Rankin, Katrina J
Stuart-Fox, Devi
Divergent male and female mate preferences do not explain incipient speciation between lizard lineages
title Divergent male and female mate preferences do not explain incipient speciation between lizard lineages
title_full Divergent male and female mate preferences do not explain incipient speciation between lizard lineages
title_fullStr Divergent male and female mate preferences do not explain incipient speciation between lizard lineages
title_full_unstemmed Divergent male and female mate preferences do not explain incipient speciation between lizard lineages
title_short Divergent male and female mate preferences do not explain incipient speciation between lizard lineages
title_sort divergent male and female mate preferences do not explain incipient speciation between lizard lineages
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7705505/
https://www.ncbi.nlm.nih.gov/pubmed/33293929
http://dx.doi.org/10.1093/cz/zoaa010
work_keys_str_mv AT mcleanclairea divergentmaleandfemalematepreferencesdonotexplainincipientspeciationbetweenlizardlineages
AT bartlericharda divergentmaleandfemalematepreferencesdonotexplainincipientspeciationbetweenlizardlineages
AT dongcarolinem divergentmaleandfemalematepreferencesdonotexplainincipientspeciationbetweenlizardlineages
AT rankinkatrinaj divergentmaleandfemalematepreferencesdonotexplainincipientspeciationbetweenlizardlineages
AT stuartfoxdevi divergentmaleandfemalematepreferencesdonotexplainincipientspeciationbetweenlizardlineages