Migration strategy and divergent sexual selection on bird song.

@article{Collins2009MigrationSA,
  title={Migration strategy and divergent sexual selection on bird song.},
  author={Sarah A. Collins and Selvino R. de Kort and Javier P{\'e}rez-Tris and Jos{\'e} Luis Teller{\'i}a},
  journal={Proceedings. Biological sciences},
  year={2009},
  volume={276 1656},
  pages={585-90}
}
Migratory birds are assumed to be under stronger sexual selection pressure than sedentary populations, and the fact that their song is more complex has been taken as confirmation of this fact. However, this assumes that sexual selection pressure due to both male competition and female choice increase together. A further issue is that, in many species, songs become less complex during competitive encounters; in contrast, female choice selects for more complex song, so the two selection pressures… CONTINUE READING
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