Fig. 5.

Plots of the pairwise invasibility scenarios possible for nonproducing (NP), producing (P), and hyperproducing (HP) phenotypes. Arrows point away from the dominant phenotype in a pair, which is defined as that with a larger invasion probability (Fig. S3). Nontransitive dynamics are not possible. It is possible, however, for an optimal intermediate good production rate to emerge (cyan and purple regions), if $a_p<a_b.$ In this scenario the hyperproducer receives diminishing good production as a function of cost to birth rate compared with the producer. (Left) $a_b=1.3$ and $a_p=\mathrm{1.5.}$ (Right) $a_b=3$ and $a_p=\mathrm{1.5.}$ Remaining parameters given in Table S2.