Figure 3.

(a,b) Relative energy payoff difference Δf versus hunter group size N for different attack delay times T_fr with c₀ = 0.0001 s⁻¹ = 0.36 h⁻¹ and different values of the relative energetic costs of attacks δ_c = 100 (a) and δ_c = 500 (b). (c) Δf versus c₀ and δ_c for fixed T_fr = 0.5 h and N = 10 (blue region indicates Δf < 0; i.e. where free riding is not beneficial). All other simulation parameters as in the main text and electronic supplementary material, S2.4.