Figure 1

Summary of the experimental design. We manipulated larval density to obtain males and females of large and small body size. We then set up groups composed of individuals with different combinations of body size. EM/\({{\rm{E}}}_{{\rm{F}}}^{({\rm{high}})}\) – groups where all individuals experienced high larval density; EM/\({{\rm{E}}}_{{\rm{F}}}^{({\rm{low}})}\)– groups where all individuals experienced low larval density; EM/UF – groups where all males were phenotypically equal, reared at low density and females had mixed phenotypes; UM/EF – groups where all females were phenotypically equal, reared at low density, and males had mixed phenotypes; UM/UF – groups where both males and females had mixed phenotypes.