Data from: Thermal regime drives a latitudinal gradient in morphology and life history in a livebearing fish

Rüdiger Riesch, Ryan A. Martin, Sarah E. Diamond, Jonas Jourdan, Martin Plath & R. Brian Langerhans
Within-species diversity is often driven by changing selective regimes along environmental gradients. Here, we provide a direct test of the environmental factors underlying phenotypic diversity across the wide native distribution of eastern mosquitofish (Gambusia holbrooki). We investigated life-history and body-shape divergence (including multiple measures of body size) across more than 14 degrees of latitude in North America, and used Akaike’s information criterion-based model selection to determine the relative contributions of thermal regime, population densities and...
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