Theoretical model

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.

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 …

Coevolutionary dynamics of polyandry and sex-linked meiotic drive

Segregation distorters located on sex chromosomes are predicted to sweep to fixation and cause extinction via a shortage of one sex, but in nature they are often found at low, stable frequencies. One potential resolution to this longstanding puzzle …

Conditional helping and evolutionary transitions to eusociality and cooperative breeding

The nonreproductive helpers of many arthropod, bird and mammal species are a perennial puzzle for evolutionary biologists. Theory and evidence suggests that helping is favored by high relatedness between social partners and by certain ecological …

The evolution of genomic imprinting: Costs, benefits and long-term consequences

Genomic imprinting refers to a pattern of gene expression in which a specific parent's allele is either under-expressed or completely silenced. Imprinting is an evolutionary conundrum because it appears to incur the costs of diploidy (e.g. presenting …

Caste load and the evolution of reproductive skew

Reproductive skew theory seeks to explain how reproduction is divided among group members in animal societies. Existing theory is framed almost entirely in terms of selection, though nonadaptive processes must also play some role in the evolution of …

Crozier’s paradox revisited: maintenance of genetic recognition systems by disassortative mating

Organisms are predicted to behave more favourably towards relatives, and kin-biased cooperation has been found in all domains of life from bacteria to vertebrates. Cooperation based on genetic recognition cues is paradoxical because it …

Costs and constraints conspire to produce honest signaling: insights from an ant queen pheromone

Signal costs and evolutionary constraints have both been proposed as ultimate explanations for the ubiquity of honest signaling, but the interface between these two factors is unclear. Here, I propose a pluralistic interpretation, and use game theory …

Spermicide, cryptic female choice and the evolution of sperm form and function

Sperm competition and cryptic female choice profoundly affect sperm morphology, producing diversity within both species and individuals. One type of within‐individual sperm variation is sperm heteromorphism, in which each male produces two or more …