Population density influences male–male competition in guppies

@article{Jirotkul1999PopulationDI,
  title={Population density influences male–male competition in guppies},
  author={Mullica Jirotkul},
  journal={Animal Behaviour},
  year={1999},
  volume={58},
  pages={1169-1175}
}
This study tested the general prediction that population density affects male-male competition, female mate choice and the opportunity for sexual selection. By manipulating the density of guppies, Poecilia reticulata, while keeping the sex ratio constant, I found that male mating tactics were phenotypically plastic with respect to density. As density increased, males decreased their courtship displays. Male-male competition and mate searching were highest at intermediate densities. Population… CONTINUE READING

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