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Field estimates of parentage reveal sexually antagonistic selection on body size in a population of Anolis lizards

Sexual dimorphism evolves when selection favors different phenotypic optima between the sexes. Such sexually antagonistic selection creates intralocus sexual conflict when traits are genetically correlated between the sexes and have sex‐specific optima. Brown anoles are highly sexually dimorphic: Ma...

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Autores principales: Duryea, Mary C., Bergeron, Patrick, Clare‐Salzler, Zachary, Calsbeek, Ryan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5513217/
https://www.ncbi.nlm.nih.gov/pubmed/28725379
http://dx.doi.org/10.1002/ece3.2443
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author Duryea, Mary C.
Bergeron, Patrick
Clare‐Salzler, Zachary
Calsbeek, Ryan
author_facet Duryea, Mary C.
Bergeron, Patrick
Clare‐Salzler, Zachary
Calsbeek, Ryan
author_sort Duryea, Mary C.
collection PubMed
description Sexual dimorphism evolves when selection favors different phenotypic optima between the sexes. Such sexually antagonistic selection creates intralocus sexual conflict when traits are genetically correlated between the sexes and have sex‐specific optima. Brown anoles are highly sexually dimorphic: Males are on average 30% longer than females and 150% heavier in our study population. Viability selection on body size is known to be sexually antagonistic, and directional selection favors large male size whereas stabilizing selection constrains females to remain small. We build on previous studies of viability selection by measuring sexually antagonistic selection using reproductive components of fitness over three generations in a natural population of brown anoles. We estimated the number of offspring produced by an individual that survived to sexual maturity (termed RS(V)), a measure of individual fitness that includes aspects of both individual reproductive success and offspring survival. We found directional selection on male body size, consistent with previous studies of viability selection. However, selection on female body size varied among years, and included periods of positive directional selection, quadratic stabilizing selection, and no selection. Selection acts differently in the sexes based on both survival and reproduction and sexual conflict appears to be a persistent force in this species.
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spelling pubmed-55132172017-07-19 Field estimates of parentage reveal sexually antagonistic selection on body size in a population of Anolis lizards Duryea, Mary C. Bergeron, Patrick Clare‐Salzler, Zachary Calsbeek, Ryan Ecol Evol Original Research Sexual dimorphism evolves when selection favors different phenotypic optima between the sexes. Such sexually antagonistic selection creates intralocus sexual conflict when traits are genetically correlated between the sexes and have sex‐specific optima. Brown anoles are highly sexually dimorphic: Males are on average 30% longer than females and 150% heavier in our study population. Viability selection on body size is known to be sexually antagonistic, and directional selection favors large male size whereas stabilizing selection constrains females to remain small. We build on previous studies of viability selection by measuring sexually antagonistic selection using reproductive components of fitness over three generations in a natural population of brown anoles. We estimated the number of offspring produced by an individual that survived to sexual maturity (termed RS(V)), a measure of individual fitness that includes aspects of both individual reproductive success and offspring survival. We found directional selection on male body size, consistent with previous studies of viability selection. However, selection on female body size varied among years, and included periods of positive directional selection, quadratic stabilizing selection, and no selection. Selection acts differently in the sexes based on both survival and reproduction and sexual conflict appears to be a persistent force in this species. John Wiley and Sons Inc. 2016-09-09 /pmc/articles/PMC5513217/ /pubmed/28725379 http://dx.doi.org/10.1002/ece3.2443 Text en © 2016 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Duryea, Mary C.
Bergeron, Patrick
Clare‐Salzler, Zachary
Calsbeek, Ryan
Field estimates of parentage reveal sexually antagonistic selection on body size in a population of Anolis lizards
title Field estimates of parentage reveal sexually antagonistic selection on body size in a population of Anolis lizards
title_full Field estimates of parentage reveal sexually antagonistic selection on body size in a population of Anolis lizards
title_fullStr Field estimates of parentage reveal sexually antagonistic selection on body size in a population of Anolis lizards
title_full_unstemmed Field estimates of parentage reveal sexually antagonistic selection on body size in a population of Anolis lizards
title_short Field estimates of parentage reveal sexually antagonistic selection on body size in a population of Anolis lizards
title_sort field estimates of parentage reveal sexually antagonistic selection on body size in a population of anolis lizards
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5513217/
https://www.ncbi.nlm.nih.gov/pubmed/28725379
http://dx.doi.org/10.1002/ece3.2443
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