Results of competition experiments. Mean fitness of contest (grey) and turn-taking (black) strategies that evolved for benefit values of one (a, c) and four (b,d). (a,b) in groups of size two (which illustrates effects of direct competition in dyads) and ten (which are conditions under which these strategies evolved). For each group all possible frequencies of the two strategies were investigated (the number of individuals with the turn-taking strategy increases from the left to the right).
Franz et al. BMC Evolutionary Biology 2011 11:323 doi:10.1186/1471-2148-11-323