Sexual isolation among widely distributed populations of Drosophila immigrans.

@article{Ehrman1980SexualIA,
  title={Sexual isolation among widely distributed populations of Drosophila immigrans.},
  author={Lee Ehrman and Peter A. Parsons},
  journal={Behavior genetics},
  year={1980},
  volume={10 4},
  pages={401-7}
}
Six strains of the cosmopolitan species D. immigrans from the Australian life zone plus one from the USA, show weak sexual isolation and more rarely sexual selection. Levels of sexual isolation cannot be related to geographic distances. Assortative mating may have evolved as a byproduct of ecological divergence.