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An empirical test of the bet‐hedging polyandry hypothesis: Female red flour beetles avoid extinction via multiple mating

Bet‐hedging via polyandry (spreading the extinction risk of the female's lineage over multiple males) may explain the evolution of female multiple mating, which is found in a wide range of animal and plant taxa. This hypothesis posits that females can increase their fitness via polyandrous mati...

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Autores principales: Matsumura, Kentarou, Miyatake, Takahisa, Yasui, Yukio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8131809/
https://www.ncbi.nlm.nih.gov/pubmed/34026007
http://dx.doi.org/10.1002/ece3.7418
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author Matsumura, Kentarou
Miyatake, Takahisa
Yasui, Yukio
author_facet Matsumura, Kentarou
Miyatake, Takahisa
Yasui, Yukio
author_sort Matsumura, Kentarou
collection PubMed
description Bet‐hedging via polyandry (spreading the extinction risk of the female's lineage over multiple males) may explain the evolution of female multiple mating, which is found in a wide range of animal and plant taxa. This hypothesis posits that females can increase their fitness via polyandrous mating when “unsuitable” males (i.e., males causing reproductive failure for various reasons) are frequent in the population and females cannot discriminate such unsuitable mates. Although recent theoretical studies have shown that polyandry can operate as a bet‐hedging strategy, empirical tests are scarce. In the present study, we tested the bet‐hedging polyandry hypothesis by using the red flour beetle Tribolium castaneum. We compared female reproductive success between monandry and polyandry treatments when females mated with males randomly collected from an experimental population, including 20% irradiated (infertile) males. In addition, we evaluated geometric mean fitness across multiple generations as the index of adaptability of bet‐hedging traits. Polyandrous females showed a significantly higher egg hatching rate and higher geometric mean fitness than monandrous females. These results strongly support the bet‐hedging polyandry hypothesis.
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spelling pubmed-81318092021-05-21 An empirical test of the bet‐hedging polyandry hypothesis: Female red flour beetles avoid extinction via multiple mating Matsumura, Kentarou Miyatake, Takahisa Yasui, Yukio Ecol Evol Original Research Bet‐hedging via polyandry (spreading the extinction risk of the female's lineage over multiple males) may explain the evolution of female multiple mating, which is found in a wide range of animal and plant taxa. This hypothesis posits that females can increase their fitness via polyandrous mating when “unsuitable” males (i.e., males causing reproductive failure for various reasons) are frequent in the population and females cannot discriminate such unsuitable mates. Although recent theoretical studies have shown that polyandry can operate as a bet‐hedging strategy, empirical tests are scarce. In the present study, we tested the bet‐hedging polyandry hypothesis by using the red flour beetle Tribolium castaneum. We compared female reproductive success between monandry and polyandry treatments when females mated with males randomly collected from an experimental population, including 20% irradiated (infertile) males. In addition, we evaluated geometric mean fitness across multiple generations as the index of adaptability of bet‐hedging traits. Polyandrous females showed a significantly higher egg hatching rate and higher geometric mean fitness than monandrous females. These results strongly support the bet‐hedging polyandry hypothesis. John Wiley and Sons Inc. 2021-03-18 /pmc/articles/PMC8131809/ /pubmed/34026007 http://dx.doi.org/10.1002/ece3.7418 Text en © 2021 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. 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 Original Research
Matsumura, Kentarou
Miyatake, Takahisa
Yasui, Yukio
An empirical test of the bet‐hedging polyandry hypothesis: Female red flour beetles avoid extinction via multiple mating
title An empirical test of the bet‐hedging polyandry hypothesis: Female red flour beetles avoid extinction via multiple mating
title_full An empirical test of the bet‐hedging polyandry hypothesis: Female red flour beetles avoid extinction via multiple mating
title_fullStr An empirical test of the bet‐hedging polyandry hypothesis: Female red flour beetles avoid extinction via multiple mating
title_full_unstemmed An empirical test of the bet‐hedging polyandry hypothesis: Female red flour beetles avoid extinction via multiple mating
title_short An empirical test of the bet‐hedging polyandry hypothesis: Female red flour beetles avoid extinction via multiple mating
title_sort empirical test of the bet‐hedging polyandry hypothesis: female red flour beetles avoid extinction via multiple mating
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8131809/
https://www.ncbi.nlm.nih.gov/pubmed/34026007
http://dx.doi.org/10.1002/ece3.7418
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