Data from: Little evidence for intralocus sexual conflict over the optimal intake of nutrients for lifespan and reproduction in the black field cricket Teleogryllus commodus

There is often large divergence in the effects of key nutrients on
lifespan and reproduction in the sexes, yet nutrient intake is regulated
in the same way in males and females given dietary choice. This suggests
that the sexes are constrained from feeding to their sex-specific
nutritional optima for these traits. Here we examine the potential for
intralocus sexual conflict (IASC) over optimal protein and carbohydrate
intake for lifespan and reproduction to constrain the evolution of
sex-specific nutrient regulation in the field cricket, Teleogryllus
commodus. We show clear sex differences in the effects of protein and
carbohydrate intake on lifespan and reproduction and strong positive
genetic correlations between the sexes for the regulated intake of these
nutrients. However, the between-sex additive genetic covariance matrix had
very little effect on the predicted evolutionary response of nutrient
regulation in the sexes. Thus, IASC appears unlikely to act as an
evolutionary constraint on sex-specific nutrient regulation in T.
commodus. This finding is supported by clear sexual dimorphism in the
regulated intake of these nutrients under dietary choice. However,
nutrient regulation did not coincide with the nutritional optima for
lifespan or reproduction in either sex suggesting that IASC is not
completely resolved in T. commodus.