Genetic variation, which is generated by mutation, recombination and gene flow, can reduce
the mean fitness of a population, both now and in the future. This 'genetic load'has been …

The handicap hypothesis of sexual selection predicts that sexual ornaments have evolved
heightened condition–dependent expression. The prediction has only recently been subject …

This book celebrates the guppy's unique contribution to evolutionary ecology. Ever since
Caryl Haskins described guppy populations as a'natural experiment'because of the way …

The genic capture hypothesis offers a resolution to the question of how genetic variation in
male sexually selected traits is maintained in the face of strong female preferences. The …

Nonamplified (null) alleles are a common feature of microsatellite genotyping and can bias
estimates of allele and genotype frequencies, thereby hindering population genetic …

Two general processes may influence gene flow among populations. One involves
divergent selection, wherein the maladaptation of immigrants and hybrids impedes gene …

Publisher Summary This chapter presents a review of mate choice and genetic quality,
defines mate choice, and discusses some of the key issues about how individuals can …

As inbreeding is costly, it has been suggested that polyandry may evolve as a means to
reduce the negative fitness consequences of mating with genetically related males. While …

In guppies (Poecilia reticulata) precopulatory sexual selection (via female choice) and post‐
copulatory selection (via sperm competition) both favour males with relatively high levels of …

Genetic rescue, an increase in population growth owing to the infusion of new alleles, can
aid the persistence of small populations. Its use as a management tool is limited by a lack of …