Evolution of heterogeneous perceptual limits and indifference in competitive foraging
Fig 2
Evolution of agents’ sensitivity threshold over 3000 generations, showing the proportion of agents across potential perceptual strategies (in 100 logistically-spaced intervals).
In panel A the population evolves from an initially homogeneous population with τ = 0, showing a bifurcation into two distinct sub-populations. Simulation parameters: 1000 agents, α = 0.5, r = 5, σ = 0.0025. The white line indicates the theoretical expected sensitivity for agents with finite sensitivity threshold. In panel B the population is initially homogeneous with τ = ∞, with the other simulation parameters unchanged. Here the population remains distributed close to the initially homogeneous starting distribution. In panel C the mutation rate is increased by a factor of three (σ = 0.0075). The population initially all remain close to τ = ∞, before a rapid bifurcation in part of the population moves to the more sensitive perceptual state.