Sexual conflict and sex allocation

Chapman, Tracey

doi:10.1098/rsbl.2009.0599

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…Evolution under different population structures may simultaneously impact sex allocation and sexual conflict in a non‐independent manner (Chapman, 2009; Schärer & Janicke, 2009). One possibility is that sexual conflict might impact sex allocation if a reduction in female fecundity prevents the production of optimal offspring sex ratios.…”

Section: Discussionmentioning

confidence: 99%

“…Although population structure is predicted to affect sex allocation and sexual conflict (Bourke, 2009), no study to date has disentangled how the type of dispersal and the scale of competition impact the evolution of both within the same set‐up. This is at odds with the fact that evolution under different population structures may simultaneously impact sex allocation and sexual conflict in a non‐independent manner, highlighting the need to integrate studies on these traits (Chapman, 2009; Schärer & Janicke, 2009). For instance, changes in sex allocation may result in the production of more or fewer individuals of each sex, which impacts sexual conflict.…”

Section: Introductionmentioning

confidence: 99%

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Consequences of population structure for sex allocation and sexual conflict

Rodrigues

Sáez

Alpedrinha

et al. 2021

J of Evolutionary Biology

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Both sex allocation and sexual conflict can be modulated by spatial structure. However, how the interplay between the type of dispersal and the scale of competition simultaneously affects these traits in sub‐divided populations is rarely considered. We investigated sex allocation and sexual conflict evolution in meta‐populations of the spider mite Tetranychus urticae evolving under budding (pairing females from the same patch) or random (pairing females from different patches) dispersal and either local (fixed sampling from each subpopulation) or global (sampling as a function of subpopulation productivity) competition. Females evolving under budding dispersal produced less female‐biased offspring sex ratios than those from the random dispersal selection regimes, contradicting theoretical predictions. In contrast, the scale of competition did not strongly affect sex allocation. Offspring sex ratio and female fecundity were unaffected by the number of mates, but female fecundity was highest when their mates evolved under budding dispersal, suggesting these males inflict less harm than those evolving under random dispersal. This work highlights that population structure can impact the evolution of sex allocation and sexual conflict. Moreover, selection on either trait may reciprocally affect the evolution of the other, for example via effects on fecundity.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Consequences of population structure for sex allocation and sexual conflict

Rodrigues

Sáez

Alpedrinha

et al. 2021

J of Evolutionary Biology

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“…Sexual conflict occurs when males and females pursue their respective fitness optima at the expense of the other sex 1 , 2 , and can culminate in antagonistic coevolution, a scenario in which adaptations in one sex select for counteradaptations in the other 3 – 6 . Also termed intersexual arms race, this evolutionary phenomenon is only sporadically documented, yet probably occurs widely in the animal kingdom 3 , 5 – 8 .…”

Section: Introductionmentioning

confidence: 99%

Male mating strategies to counter sexual conflict in spiders

Zhang

Tan

et al. 2022

Commun Biol

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When sexual conflict selects for reproductive strategies that only benefit one of the sexes, evolutionary arms races may ensue. Female sexual cannibalism is an extreme manifestation of sexual conflict. Here we test two male mating strategies aiming at countering sexual cannibalism in spiders. The “better charged palp” hypothesis predicts male selected use of the paired sexual organ (palp) containing more sperm for their first copulation. The “fast sperm transfer” hypothesis predicts accelerated insemination when cannibalism is high. Our comparative tests on five orbweb spider species with varying levels of female sexual cannibalism and sexual size dimorphism (SSD) reveal that males choose the palp with more sperm for the first copulation with cannibalistic females and that males transfer significantly more sperm if females are cannibalistic or when SSD is biased. By supporting the two hypotheses, these results provide credibility for male mating syndrome. They, however, open new questions, namely, how does a male differentiate sperm quantities between his palps? How does he perform palp choice after assessing his cannibalistic partner? By conducting follow-up experiments on Nephilengys malabarensis, we reveal that it is sperm volume detection, rather than left-right palp dominance, that plays prominently in male palp choice.

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Fishes in Lagoons and Estuaries in the Mediterranean 1

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Sexual conflict and sex allocation

Cited by 6 publications

References 28 publications

Consequences of population structure for sex allocation and sexual conflict

Consequences of population structure for sex allocation and sexual conflict

Male mating strategies to counter sexual conflict in spiders

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