Headmen, shamans, and mothers: Natural and sexual selection for computational services

Evolution and Human Behavior, Journal Year: 2025, Volume and Issue: 46(1), P. 106651 - 106651

Published: Jan. 1, 2025

Language: Английский

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Genomic evidence that a sexually selected trait captures genome-wide variation and facilitates the purging of genetic load

Nature Ecology & Evolution, Journal Year: 2022, Volume and Issue: 6(9), P. 1330 - 1342

Published: July 18, 2022

Language: Английский

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Male harm offsets the demographic benefits of good genes

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(10)

Published: March 2, 2023

Sexual conflict can arise when males evolve traits that improve their mating success but in doing so harm females. By reducing female fitness, male diminish offspring production a population and even drive extinction. Current theory on is based the assumption an individual’s phenotype solely determined by its genotype. But expression of most sexually selected also influenced variation biological condition (condition-dependent expression), such individuals better express more extreme phenotypes. Here, we developed demographically explicit models sexual evolution where vary condition. Because condition-dependent readily evolves for underlying conflict, show intense populations are Such intensified reduces mean fitness thus generate negative association between size. The impact demography especially likely to be detrimental genetic basis coevolves with conflict. This occurs because selection favors alleles (the so-called good genes effect), producing feedback drives harm. Our results indicate presence harm, effect fact easily becomes populations.

Language: Английский

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Stronger net selection on males across animals

eLife, Journal Year: 2021, Volume and Issue: 10

Published: Nov. 17, 2021

Sexual selection is considered the major driver for evolution of sex differences. However, eco-evolutionary dynamics sexual and their role a population's adaptive potential to respond environmental change have only recently been explored. Theory predicts that promotes adaptation at low demographic cost if aligned with natural net stronger on males compared females. We used comparative approach show indeed in provide preliminary support this bias associated selection. Given both sexes share vast majority genes, our findings corroborate notion genome often confronted more stressful environment when expressed males. Collectively, study supports one long-standing key assumptions required bolster adaptation, may therefore enable some species track efficiently.

Language: Английский

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Sexual selection, genomic evolution and population fitness in Drosophila pseudoobscura

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2025, Volume and Issue: 292(2044)

Published: April 1, 2025

Sexual selection shapes the genome in unique ways. It is also likely to have significant fitness consequences, such as purging deleterious mutations from or conversely maintaining genetic load a population via sexual conflict. Here, we examined what influence of has on genomic variation potentially underlying using experimentally evolved Drosophila pseudoobscura populations. was manipulated by keeping replicate lines elevated polyandry strict monogamy for approximately 200 generations followed individual-based sequencing. Using pi ( π ), fixation index F st )and recombination rate measures, confirmed signatures were not dispersed but mainly localized third and X chromosome. Overall mutational similar between our analysis distribution effects revealed considerable chromosomes. Furthermore, found that transposable elements differs lines, with higher monogamous lines. Our results suggest complex interactions purifying conflict are shaping genome, particularly chromosome 3 sex chromosome; influences divergence across chromosomes more way than proposed simple ‘purging’ loci.

Language: Английский

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Male harm suppresses female fitness, affecting the dynamics of adaptation and evolutionary rescue

Evolution Letters, Journal Year: 2023, Volume and Issue: 8(1), P. 149 - 160

Published: Jan. 1, 2023

One of the most pressing questions we face as biologists is to understand how climate change will affect evolutionary dynamics natural populations and these in turn population recovery. Increasing evidence shows that sexual selection favors viability local adaptation. However, can also foster conflict drive evolution male harm females. Male extraordinarily widespread has potential suppress female fitness compromise growth, yet currently ignore its net effects across taxa or influence on adaptation rescue. We conducted a comparative meta-analysis quantify impact found an overall negative effect fitness. Negative seem depend proxies selection, increasing inversely relative size species with strong sperm competition. then developed theoretical models explore affects show that, when depends adaptation, decline reduced, but at cost slowing down genetic This trade-off suggests eco-evolutionary feedback act like double-edged sword, reducing extinction risk by buffering demographic costs change, delaying variation mating system type mitigate this trade-off. Our work productivity, identifies mechanistic factors underlying variability such taxa, underscores acknowledging condition-dependence may be important processes adapt environmental change.

Language: Английский

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Heat stress reveals a fertility debt owing to postcopulatory sexual selection

Evolution Letters, Journal Year: 2023, Volume and Issue: 8(1), P. 101 - 113

Published: March 16, 2023

Abstract Climates are changing rapidly, demanding equally rapid adaptation of natural populations. Whether sexual selection can aid such is under debate; while should promote when individuals with high mating success also best adapted to their local surroundings, the expression sexually selected traits incur costs. Here we asked what demographic consequences costs may be once climates change become harsher and strength increases. We first adopted a classic life history theory framework, incorporating trade-off between reproduction maintenance, applied it male germline generate formalized predictions for how an evolutionary strong postcopulatory (sperm competition) affect fertility acute adult heat stress. then tested these by assessing thermal sensitivity (TSF) in replicated lineages seed beetles maintained 68 generations three alternative regimes manipulating opportunity selection. In line theoretical predictions, find that males evolving suffer from increased TSF. Interestingly, females regime selection, who experienced relaxed on own reproductive effort, had benign settings but suffered TSF, like brothers. This implies female TSF evolved through genetic correlation males. Paternal not maternal stress reduced offspring no evidence adaptive transgenerational plasticity among heat-exposed offspring, indicating observed effects compound over generations. Our results suggest trade-offs increasing revealed harsh environments. put polyandrous species immediate risk during extreme waves expected future climate change.

Language: Английский

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Host Plant Effects on Sexual Selection Dynamics in Phytophagous Insects

Annual Review of Entomology, Journal Year: 2023, Volume and Issue: 69(1), P. 41 - 57

Published: Aug. 10, 2023

Natural selection is notoriously dynamic in nature, and so, too, sexual selection. The interactions between phytophagous insects their host plants have provided valuable insights into the many ways which ecological factors can influence In this review, we highlight recent discoveries provide guidance for future work area. Importantly, affect both agents of (e.g., mate choice male-male competition) traits under ornaments weapons). Furthermore, our rapidly changing world, now routinely encounter new potential plants. process adaptation to a may be hindered or accelerated by selection, unexplored evolutionary trajectories that emerge from these dynamics are relevant pest management insect conservation strategies. Examining effects on has advance fundamental understanding conflict, range evolution, speciation, with relevance across taxa.

Language: Английский

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Sexual selection moderates heat stress response in males and females

Functional Ecology, Journal Year: 2022, Volume and Issue: 36(12), P. 3096 - 3106

Published: Oct. 18, 2022

A widespread effect of climate change is the displacement organisms from their thermal optima. The associated stress imposed by has been argued to have a particularly strong impact on male reproduction but evidence for this postulated sex-specific response equivocal.One important factor that may explain intra- and interspecific variation in responses sexual selection, which predicted magnify negative effects stress. Nevertheless, empirical studies exploring interplay selection heat are still scarce.We tested experimentally an interaction between red flour beetle

Language: Английский

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Environmental complexity mitigates the demographic impact of sexual selection

Ecology Letters, Journal Year: 2024, Volume and Issue: 27(1)

Published: Jan. 1, 2024

Abstract Sexual selection and the evolution of costly mating strategies can negatively impact population viability adaptive potential. While laboratory studies have documented outcomes stemming from these processes, recent observations suggest that demographic sexual is contingent on environment therefore may been overestimated in simple settings. Here we find support for this claim. We exposed copies beetle populations, previously evolved with or without selection, to a 10‐generation heatwave while maintaining half them other complex environment. Populations an evolutionary history maintained larger sizes more stable growth rates (relative simple) environments, effect not seen populations selection. These results implications forecasting negative sexually selected might be low natural populations.

Language: Английский

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