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Female mate-choice behavior and sympatric speciation
Machteld N Verzijden1, Robert F Lachlan, Maria R Servedio
1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA. verzijden@rulsfb.leidenuniv.nl
Evolution; International Journal of Organic Evolution
|January 13, 2006
Summary
Mate choice mechanisms significantly impact speciation. Female imprinting on mothers facilitates sympatric speciation, while imprinting on fathers or preference genes makes it less likely.
Area of Science:
- Evolutionary Biology
- Speciation Research
- Behavioral Ecology
Background:
- Sympatric speciation models often simplify mate choice rules.
- Empirical studies reveal more complex female choice behaviors than typically modeled.
Purpose of the Study:
- To compare the efficacy of different female mate choice mechanisms in driving speciation.
- To investigate the role of sexual imprinting and preference genes in sympatric speciation.
Main Methods:
- Utilized deterministic one-locus population genetic models.
- Employed polygenic, individual-based simulations based on Dieckmann and Doebeli (1999).
- Compared phenotype matching, sexual imprinting (maternal, paternal, oblique), and preference genes.
Main Results:
- Maternal imprinting closely mimics phenotype matching, promoting easier sympatric speciation.
- Paternal or oblique imprinting significantly reduces the likelihood of speciation.
- Preference genes lead to easy male trait evolution but potentially weak trait-preference correlations, questioning speciation outcomes.
Conclusions:
- The inheritance mechanism of mate choice is crucial for sympatric speciation.
- Maternal imprinting is a strong driver of divergence, unlike paternal or oblique imprinting.
- The interpretation of speciation requires careful consideration of trait-preference correlations when preference genes are involved.