Sexual size dimorphism and timing of spring migration in birds

@article{Kissner2003SexualSD,
  title={Sexual size dimorphism and timing of spring migration in birds},
  author={Kelley J. Kissner and Patrick J. Weatherhead and Charles M. Francis},
  journal={Journal of Evolutionary Biology},
  year={2003},
  volume={16}
}
Abstract Sexually selected traits are limited by selection against those traits in other fitness components, such as survival. Thus, sexual selection favouring large size in males should be balanced by higher mortality of larger males. However, evidence from red‐winged blackbirds (Agelaius phoeniceus) indicates that large males survive better than small males. A survival advantage to large size could result from males migrating north in early spring, when harsh weather favours large size for… Expand
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