Data from: Heritability and cross-sex genetic correlations of early life circulating testosterone levels in a wild mammal

Testosterone is an important hormone which has been shown to have sex-specific links to fitness in numerous species. Although testosterone concentrations vary substantially between individuals in a population, little is known about its heritable genetic basis or between-sex genetic correlations, which determine its evolutionary potential. We found circulating neonatal testosterone levels to be both heritable (0.160±0.064SE) and correlated between the sexes (0.942±0.648SE) in wild red deer calves. This may have important evolutionary implications if, as in adults, the sexes have divergent optima for circulating testosterone levels.