Postmating sexual selection favors males that sire offspring with low fitness.

@article{Bilde2009PostmatingSS,
  title={Postmating sexual selection favors males that sire offspring with low fitness.},
  author={Trine Bilde and Anne Foged and Nadia Schilling and G{\"o}ran Arnqvist},
  journal={Science},
  year={2009},
  volume={324 5935},
  pages={1705-6}
}
Despite the costs of mating, females of most taxa mate with multiple males. Polyandrous females are hypothesized to gain genetic benefits for their offspring, but this assumes paternity bias favoring male genotypes that enhance offspring viability. We determined net male genetic effects on female and offspring fitness in a seed beetle and then tested whether fertilization success was biased in favor of high-quality male genotypes in double mating experiments. Contrary to expectations, high… CONTINUE READING

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