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A stochastic model for speciation by mating preferences
Camille Coron1, Manon Costa2, Hélène Leman3
1Laboratoire de Mathématiques d'Orsay, Univ. Paris-Sud, CNRS, Université Paris-Saclay, 91405, Orsay, France.
Journal of Mathematical Biology
|September 16, 2017
Summary
Mating preferences alone can drive reproductive isolation in subdivided populations. This study models how assortative mating, even with small preferences, leads to speciation over time, dependent on population size.
Area of Science:
- Evolutionary Biology
- Population Genetics
- Mathematical Biology
Background:
- Speciation mechanisms are central to evolutionary biology.
- Understanding how reproductive isolation arises is key to explaining biodiversity.
Purpose of the Study:
- To investigate if mating preferences alone can cause reproductive isolation.
- To model the emergence of speciation in a spatially structured population.
Main Methods:
- Developed a stochastic population model with assortative mating.
- Analyzed the model's deterministic limit using coupled nonlinear differential equations.
- Studied the impact of migration and carrying capacity on isolation.
Main Results:
- Small mating preferences are sufficient to establish reproductive isolation between subpopulations.
- Quantified the time to reproductive isolation as a function of carrying capacity.
- Demonstrated robustness of findings across model generalizations.
Conclusions:
- Assortative mating is a potent evolutionary force for initiating speciation.
- Spatial structure and migration dynamics interact with mating preferences to shape isolation.
- The model provides a framework for understanding speciation driven by non-ecological factors.
Keywords:
Birth and death process with competitionDynamical systemsMating preferenceReproductive isolationMore Related Videos
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