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

Matsumura, Kentarou; Miyatake, Takahisa; Yasui, Yukio

doi:10.1002/ece3.7418

Cited by 11 publications

(3 citation statements)

References 49 publications

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“…Nevertheless, there is evidence that females might benefit from water transferred as part of the male ejaculate, because water is likely a limited resource in the dry flour habitat of T. castaneum (Droge‐Young et al, 2016). Furthermore, there might be indirect benefits of multiple mating in terms of higher egg viability at increased levels of polyandry (Matsumura et al, 2021; Pai & Yan, 2002) and bet‐hedging benefits from mating with multiple partners (Matsumura et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Population density affects sexual selection in an insect model

Winkler,

Eilhardt,

Janicke

2023

Functional Ecology

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Understanding the impact of demographic and ecological factors on the strength of sexual selection is pivotal to predict eco‐evolutionary dynamics in populations facing environmental change. Density is expected to show pervasive intra‐ and interspecific variation in natural populations, but its effect on sexual selection remains largely unexplored. We tested experimentally the effect of density on standardized metrics of sexual selection in male and female red flour beetles. Specifically, we explored density effects during mating by manipulating the size of mating groups and the mating arena. We found that higher densities imposed by a larger group size amplified the opportunity for pre‐copulatory sexual selection in females and, to a smaller extent, also in males. Moreover, in males, we detected a higher opportunity for post‐copulatory sexual selection in larger groups. By contrast, higher densities imposed by differences in the size of the mating arena resulted in a steeper male sexual selection gradient. Overall, these data suggest that density is an important environmental factor contributing to the tremendous variation in the strength of sexual selection within and among species. Read the free Plain Language Summary for this article on the Journal blog.

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Section: Discussionmentioning

confidence: 99%

Population density affects sexual selection in an insect model

Winkler,

Eilhardt,

Janicke

2023

Functional Ecology

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“…Thus, our findings suggest that females may benefit from having access to multiple partners under elevated temperatures. Experimental studies testing for fitness consequences of polyandry in T. castaneum provided mixed results, but overall suggest that females obtain indirect rather than direct benefits (Bernasconi & Keller, 2001 ; Matsumura et al, 2021 ; Pai et al, 2005 ; Pai et al, 2007 ; Pai & Yan, 2002 ; Pai & Yan, 2020 ). As such, the question of how potential benefits of polyandry depend on the thermal conditions remains largely unexplored.…”

Section: Discussionmentioning

confidence: 99%

Sexual selection moderates heat stress response in males and females

et al. 2022

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Ambient temperature is one of the most variable environmental factors that terrestrial organisms face during their lifetimes and is predicted to have profound effects on behaviour, physiology and life-history traits (Angilletta, 2009;Huey et al., 2012;Tattersall et al., 2012). The Intergovernmental Panel on Climate Change is currently predicting a rise of global surface temperature of 1.2 to 3.0°C until 2060 (IPCC, 2021), which will be likely linked to a higher frequency of extreme weather phenomena such as drought and heat-

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“…Thus, our findings suggest that females may benefit from multiple mating under elevated temperatures. Experimental studies testing for fitness consequences of polyandry in T. castaneum provided mixed results, but overall suggest that females obtain indirect rather than direct benefits (Bernasconi & Keller 2001; Pai & Yan 2002; Pai, Bennett & Yan 2005; Pai, Feil & Yan 2007; Pai & Yan 2020; Matsumura, Miyatake & Yasui 2021). As such, the question of how potential benefits of polyandry depend on the thermal conditions remains largely unexplored.…”

Section: Discussionmentioning

confidence: 99%

Sexual selection moderates heat stress response in males and females

Moiron

Winkler

Martin

et al. 2022

Preprint

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A widespread effect of climate change is the displacement of organisms from their thermal optima. The associated thermal stress imposed by climate change has been argued to have a particularly strong impact on male reproduction but evidence for this postulated sex-specific stress response is equivocal. One important factor that may explain intra- and interspecific variation in stress responses is sexual selection, which is predicted to magnify negative effects of stress. Nevertheless, empirical studies exploring the interplay of sexual selection and heat stress are still scarce. We tested experimentally for an interaction between sexual selection and thermal stress in the red flour beetle Tribolium castaneum by contrasting heat responses in male and female reproductive success between setups of enforced monogamy versus polygamy. We found that polygamy magnifies detrimental effects of heat stress in males but relaxes the observed negative effects in females. Our results suggest that sexual selection can reverse sex differences in thermal sensitivity, and may therefore alter sex-specific selection on alleles associated with heat tolerance. We argue that these findings have important implications for predicting the role of sexual selection for the adaptation to current global warming and increased frequency of extreme climatic events.

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

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 11 publications

References 49 publications

Population density affects sexual selection in an insect model

Population density affects sexual selection in an insect model

Sexual selection moderates heat stress response in males and females

Sexual selection moderates heat stress response in males and females

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