Ecology, sexual selection, and the evolution of mating systems.

@article{Emlen1977EcologySS,
  title={Ecology, sexual selection, and the evolution of mating systems.},
  author={Stephen T. Emlen and Lewis W. Oring},
  journal={Science},
  year={1977},
  volume={197 4300},
  pages={
          215-23
        }
}
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Comparisons are among the first to confirm the adaptive significance of sex change as described by the size-advantage model and reveal strikingly similar patterns of sex allocation and mating system evolution with comparable lability in wrasses and parrotfishes.
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