Data from: Genetic differentiation and selection against migrants in evolutionarily replicated extreme environments

Martin Plath, Markus Pfenninger, Hannes Lerp, Rüdiger Riesch, Christoph Eschenbrenner, Patrick A. Slattery, David Bierbach, Nina Herrmann, Matthias Schulte, Lenin Arias-Rodriguez, Jeane Rimber Indy, Courtney N. Passow, Michael Tobler & Courtney Passow
We investigated mechanisms of reproductive isolation in livebearing fishes (genus Poecilia) inhabiting sulfidic and nonsulfidic habitats in three replicate river drainages. Although sulfide spring fish convergently evolved divergent phenotypes, it was unclear if mechanisms of reproductive isolation also evolved convergently. Using microsatellites, we found strongly reduced gene flow between adjacent populations from different habitat types, suggesting that local adaptation to sulfidic habitats repeatedly caused the emergence of reproductive isolation. Reciprocal translocation experiments indicate strong selection...
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