Recurrent origin of a sexually selected trait in Xiphophorus fishes inferred from a molecular phylogeny

@article{Meyer1994RecurrentOO,
  title={Recurrent origin of a sexually selected trait in Xiphophorus fishes inferred from a molecular phylogeny},
  author={Axel Meyer and Jean M. Morrissey and Manfred Schartl},
  journal={Nature},
  year={1994},
  volume={368},
  pages={539-542}
}
DARWIN1 believed that sexual selection accounts for the evolution of exaggerated male ornaments, such as the sword-like caudal fin extensions of male fishes of the genus Xiphophorus, that appear detrimental to survival. Swordtails continue to feature prominently in empirical work and theories of sexual selection; the pre-existing bias hypothesis has been offered as an explanation for the evolution of swords in these fishes2,3. Based upon a largely morphological phylogeny, this hypothesis… CONTINUE READING
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