Biology – Quantitative Biology – Populations and Evolution
Scientific paper
2007-08-22
Biology
Quantitative Biology
Populations and Evolution
6 pages and 8 figures. Submitted
Scientific paper
Cichlid fishes are one of the best model system for the study of evolution of the species. Inspired by them, in this paper we simulated the splitting of a single species into two separate ones via random mutations, with both populations living together in sympatry, sharing the same habitat. We study the ecological, mating and genetic conditions needed to reproduce the polychromatism and polymorphism of three species of the Midas Cichlid species complex. Our results show two scenarios for the A. Citrinellus speciation process, one with and the other without disruptive natural selection. In the first scenario, the ecological and genetic conditions are sufficient to create two new species, while in the second the mating and genetic conditions must be synchronized in order to control the velocity of genetic drift.
de Oliveira Suzana Moss
Luz-Burgoa K.
Sa Martins Jorge S.
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