Sexual selection

Sexual selection improves population fitness: a systematic review and meta-analysis

We synthesised 459 effect sizes from 65 pertinent experimental evolution studies using meta-analysis, and found that sexual selection on males tends to elevate the mean and reduce the variance for many fitness traits. The beneficial effect was stronger in female traits than males, and for populations evolving under stressful conditions. The results have implications for conservation and captive breeding programs.

Sexual selection

Population genetic consequences of sexual selection, honest signalling, sperm biology, etc.

Intralocus sexual conflict

The causes, consequences, and genetic basis of the maladaptation that arises when males and females share a genome.

Evolution of female choice under intralocus sexual conflict and genotype-by-environment interactions

We use theoretical models to examine the evolution of female choice when there is both intralocus sexual conflict and local adaptation. We show that IASC can weaken female preferences for high-condition males -- or even cause a preference for males in low condition -- depending on the relative benefits of producing well-adapted sons versus daughters. We discuss the relevance of our results to conservation genetics and empirical evolutionary biology.

The effects of stress and sex on selection, genetic covariance, and the evolutionary response

The capacity of a population to adapt to selection (evolvability) depends on whether the structure of genetic variation permits the evolution of fitter trait combinations. Selection, genetic variance and genetic covariance can change under …

Sexual selection expedites the evolution of pesticide resistance

Using experimental evolution, we test whether allowing or preventing sexual selection on males affects the rate at which flour beetle populations evolve resistance (and susceptibility) to insecticide.

Ornament complexity is correlated with sexual selection: a comment on Raia et al

Raia et al. propose that the evolution of the shape and complexity of animal ornaments (e.g., deer antlers) can be explained by interspecific variation in body size and is not influenced by sexual selection. They claim to show that ornament …

Bet hedging via multiple mating: a meta-analysis

Polyandry has been hypothesized to allow females to “bet hedge” against mating only with unsuitable mates, reducing variance in offspring fitness between members of a polyandrous lineage relative to a single‐mating one. Theoretically, this reduction …

Bet-hedging via polyandry: A comment on 'Mating portfolios: bet-hedging, sexual selection and female multiple mating'

Garcia-Gonzalez et al. [1] conducted an original and elegant experiment examining whether fertilization of a female's eggs by multiple males (polyandry) can provide fitness benefits via ‘bet-hedging’ (i.e. due to decreased variance in offspring …

Assessing the alignment of sexual and natural selection using radio-mutagenized seed beetles

A major unsolved question in evolutionary biology concerns the relationship between natural and sexual selection. Sexual selection might augment natural selection, for example if mutations that harm female fecundity also reduce male mating success. …