Singular strategies <i>x</i> (degree of collective foraging) and their stability as a function of food item density.

The cyan lines represent continuously stable strategies (evolutionarily and convergence stable), the yellow lines represent repellors (neither evolutionarily nor convergence stable), and magenta lines represent branching points (evolutionarily unstable and convergence stable). The values and statuses of the singular strategies are plotted for different competition scenarios: the dashed lines represent symmetric competition (ϕ = 0); the dotted lines represent weakly asymmetric competition (ϕ = 1); and full lines represent strongly asymmetric competition (ϕ = 5).