Data from: Environmental heterogeneity generates opposite gene-by-environment interactions for two fitness-related traits within a population

Zachary Wyatt Culumber, Molly Schumer, Scott Monks & Michael Tobler
Theory predicts that environmental heterogeneity offers a potential solution to the maintenance of genetic variation within populations, but empirical evidence remains sparse. The livebearing fish Xiphophorus variatus exhibits polymorphism at a single locus, with different alleles resulting in up to five distinct melanistic “tailspot” patterns within populations. We investigated the effects of heterogeneity in two ubiquitous environmental variables (temperature and food availability) on two fitness-related traits (upper thermal limits and body condition) in two different...
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