Speciation by Natural and Sexual Selection: Models and Experiments

@article{Kirkpatrick2002SpeciationBN,
  title={Speciation by Natural and Sexual Selection: Models and Experiments},
  author={Mark Kirkpatrick and Virginie Ravign{\'e}},
  journal={The American Naturalist},
  year={2002},
  volume={159},
  pages={S22 - S35}
}
A large number of mathematical models have been developed that show how natural and sexual selection can cause prezygotic isolation to evolve. This article attempts to unify this literature by identifying five major elements that determine the outcome of speciation caused by selection: a form of disruptive selection, a form of isolating mechanism (assortment or a mating preference), a way to transmit the force of disruptive selection to the isolating mechanism (direct selection or indirect… 

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The case for sexual selection is not as strongly supported as, for example, allopatric speciation, but probably contributes most effectively alongside ecological selection or selection...
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TLDR
An agent model which presents the emergence of sexual barriers through the onset of assortative mating, a condition that might lead to sympatric speciation is studied, showing the resulting equilibrium to have partial memory of the initial state and that the process of going from a polymorphic panmictic phase to a phase where assortsative mating acts as sexual barrier can be described as a first-order transition.
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