Figure 5
Coexistence of metabolic and parasitic replicators in Model II. The rows of the figure differ in the number of diffusion steps per update: first row: D = 0, second row: D = 4; third row: D = 100. x- and y-axes are metabolic (h) and replication (r) neighbourhood sizes respectively (N: von Neumann neighbourhood; 3: 3×3, 5: 5×5, 7: 7×7, 25: 25×25 and 37: 37×37 Moore neighbourhoods). The gray-scale shades of the boxes correspond to average replicator densities (%, see scale bar) on the whole grid at the end of the simulations (at t = 1.000). The numbers within the boxes of the panels indicate the average ratio (%) of the numbers of phenotype- and genotype forms of metabolic and parasite replicators at the end of the simulations (100 × Phenx/Genx, x = 1, .., 3 and Parasite means both replicator-forms) in five replicate runs of the simulation program in each parameter set. Zeros mean that the system collapses (no replicator survives to t = 1.000). Replication constants of metabolic replicators: k 1p = 3.0, k 1g = 4.0, k 2p = 5.0, k 2g = 6.0 , k 3p = 7.0, k 3g = 8.0. Replication constants of parasite replicators k 4p = 9.0 and k 4g = 10.0. Subscripts p and g denote phenotype-forms and genotype-forms of replicator types, respectively.