Data for: Environmental complexity mitigates the demographic impact of sexual selection

Sexual selection and the evolution of costly mating strategies can negatively impact population demography and adaptive potential. While laboratory studies have documented outcomes stemming from these processes, theory suggests that the demographic impact of sexual selection is contingent on the environment and therefore may have been overestimated in simple laboratory settings. Here we find support for this claim. We exposed copies of beetle lines, previously evolved with or without sexual selection, to a 10-generation heatwave while maintaining half of them in a simple environment and the other half in a complex environment. Populations with an evolutionary history of sexual selection maintained larger sizes and more stable growth rates in complex (relative to simple) environments, an effect not seen in populations that evolved without sexual selection. These results have implications for evolutionary forecasting and suggest that the demographic impact of sexual selection in natural p..., , , # Data for: Environmental complexity mitigates the demographic impact of sexual selection

## Description of the data and file structure

The data underlying all analyses is available in the Excel file containing 5 spreadsheets, or as separate txt files, with the following names;

\"Trait-values of founding lines\" (used to ordinate experimental evolution line founders and test for differences between regimes in evolution of mating traits - Fig 1B)
Means for each of the six evolution lines (given by the \"Evolution Regime\" and \"founder\" columns) for the following traits:
\- Sperm competition success (given as the proportion of offspring sired in competition with a reference male)
\- Sperm production (estimated number of sperm, matured over 25h, transferred by a male to a female)
\- remating rate (a relative measure of the probability of remating in the first 24h following the first mating)
\- male-male fertility decline (the proportional decline in fertility in males being co-reared with...