Color assortative mating contributes to sympatric divergence of neotropical cichlid fish.

@article{Elmer2009ColorAM,
  title={Color assortative mating contributes to sympatric divergence of neotropical cichlid fish.},
  author={Kathryn R Elmer and Topi K Lehtonen and Axel Meyer},
  journal={Evolution; international journal of organic evolution},
  year={2009},
  volume={63 10},
  pages={2750-7}
}
It is still debated vigorously whether sexual selection can result in speciation without physical barriers to gene flow. In this study, we used field data and molecular methods to investigate the gold-normal color polymorphism in two endemic cichlid fish species of crater lake Xiloá, Nicaragua. We found significant assortative mating by color in both Amphilophus xiloaensis and A. sagittae. Focusing on A. xiloaensis, microsatellite allele frequencies, an assignment test, and model-based cluster… CONTINUE READING