Cargando…
Adjustment of sex allocation to co‐foundress number and kinship under local mate competition: An inclusive‐fitness analysis
Hamilton's theory of local mate competition (LMC) describes how competition between male relatives for mating opportunities favours a female‐biased parental investment. LMC theory has been extended in many ways to explore a range of genetic and life‐history influences on sex allocation strategi...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8247433/ https://www.ncbi.nlm.nih.gov/pubmed/33078506 http://dx.doi.org/10.1111/jeb.13719 |
_version_ | 1783716523956764672 |
---|---|
author | Gardner, Andy Hardy, Ian C. W. |
author_facet | Gardner, Andy Hardy, Ian C. W. |
author_sort | Gardner, Andy |
collection | PubMed |
description | Hamilton's theory of local mate competition (LMC) describes how competition between male relatives for mating opportunities favours a female‐biased parental investment. LMC theory has been extended in many ways to explore a range of genetic and life‐history influences on sex allocation strategies, including showing that increasing genetic homogeneity within mating groups should favour greater female bias. However, there has been no quantitative theoretical prediction as to how females should facultatively adjust their sex allocation in response to co‐foundress number and kinship. This shortfall has been highlighted recently by the finding that sex ratios produced by sub‐social parasitoid wasps in the family Bethylidae are affected by the number of co‐foundresses and by whether these are sisters or unrelated females. Here we close this gap in LMC theory by taking an inclusive‐fitness approach to derive explicit theoretical predictions for this scenario. We find that, in line with the recent empirical results, females should adopt a more female‐biased sex allocation when their co‐foundresses are less numerous and are their sisters. Our model appears to predict somewhat more female bias than is observed empirically; we discuss a number of possible model extensions that would improve realism and that would be expected to result in a closer quantitative fit with experimental data. |
format | Online Article Text |
id | pubmed-8247433 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-82474332021-07-02 Adjustment of sex allocation to co‐foundress number and kinship under local mate competition: An inclusive‐fitness analysis Gardner, Andy Hardy, Ian C. W. J Evol Biol Short Communications Hamilton's theory of local mate competition (LMC) describes how competition between male relatives for mating opportunities favours a female‐biased parental investment. LMC theory has been extended in many ways to explore a range of genetic and life‐history influences on sex allocation strategies, including showing that increasing genetic homogeneity within mating groups should favour greater female bias. However, there has been no quantitative theoretical prediction as to how females should facultatively adjust their sex allocation in response to co‐foundress number and kinship. This shortfall has been highlighted recently by the finding that sex ratios produced by sub‐social parasitoid wasps in the family Bethylidae are affected by the number of co‐foundresses and by whether these are sisters or unrelated females. Here we close this gap in LMC theory by taking an inclusive‐fitness approach to derive explicit theoretical predictions for this scenario. We find that, in line with the recent empirical results, females should adopt a more female‐biased sex allocation when their co‐foundresses are less numerous and are their sisters. Our model appears to predict somewhat more female bias than is observed empirically; we discuss a number of possible model extensions that would improve realism and that would be expected to result in a closer quantitative fit with experimental data. John Wiley and Sons Inc. 2020-11-18 2020-12 /pmc/articles/PMC8247433/ /pubmed/33078506 http://dx.doi.org/10.1111/jeb.13719 Text en © 2020 The Authors. Journal of Evolutionary Biology published by John Wiley & Sons Ltd on behalf of European Society for Evolutionary Biology https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Short Communications Gardner, Andy Hardy, Ian C. W. Adjustment of sex allocation to co‐foundress number and kinship under local mate competition: An inclusive‐fitness analysis |
title | Adjustment of sex allocation to co‐foundress number and kinship under local mate competition: An inclusive‐fitness analysis |
title_full | Adjustment of sex allocation to co‐foundress number and kinship under local mate competition: An inclusive‐fitness analysis |
title_fullStr | Adjustment of sex allocation to co‐foundress number and kinship under local mate competition: An inclusive‐fitness analysis |
title_full_unstemmed | Adjustment of sex allocation to co‐foundress number and kinship under local mate competition: An inclusive‐fitness analysis |
title_short | Adjustment of sex allocation to co‐foundress number and kinship under local mate competition: An inclusive‐fitness analysis |
title_sort | adjustment of sex allocation to co‐foundress number and kinship under local mate competition: an inclusive‐fitness analysis |
topic | Short Communications |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8247433/ https://www.ncbi.nlm.nih.gov/pubmed/33078506 http://dx.doi.org/10.1111/jeb.13719 |
work_keys_str_mv | AT gardnerandy adjustmentofsexallocationtocofoundressnumberandkinshipunderlocalmatecompetitionaninclusivefitnessanalysis AT hardyiancw adjustmentofsexallocationtocofoundressnumberandkinshipunderlocalmatecompetitionaninclusivefitnessanalysis |