Postcopulatory inbreeding avoidance in guppies

@article{Fitzpatrick2014PostcopulatoryIA,
  title={Postcopulatory inbreeding avoidance in guppies},
  author={John L. Fitzpatrick and J. P. Evans},
  journal={Journal of Evolutionary Biology},
  year={2014},
  volume={27}
}
In many species, the negative fitness effects of inbreeding have facilitated the evolution of a wide range of inbreeding avoidance mechanisms. Although avoidance mechanisms operating prior to mating are well documented, evidence for postcopulatory mechanisms of inbreeding avoidance remain scarce. Here, we examine the potential for paternity biases to favour unrelated males when their sperm compete for fertilizations though postcopulatory inbreeding avoidance mechanisms in the guppy, Poecilia… 
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Estimation of evolution of interacting precopulatory and post‐copulatory inbreeding avoidance and associated polyandry given strong inbreeding depression and different evolutionary constraints and direct costs found that evolution of post‐Copulatory in breeding avoidance increased selection for initially rare polyandries and that evolutionof a costly inbreedingavoidance strategy became negligible over time given a lower‐cost alternative strategy.
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