Table 1.

Summary of notation used.

symbol	description
p	proportion of S patches, i.e. containing the sexual species only
q	proportion of B patches, i.e. containing both species
1−p−q	proportion of E patches, i.e. empty patches
cS	rate at which sexuals, that originate from S patches, colonize empty (E) patches
cA	rate at which asexuals (from B patches) colonize sexual (S) patches
α	proportion of sexual colonization rate cS that is still maintained if the departure patch contains asexuals
β	proportion of colonizations of empty (E) patches which include both sexuals and asexuals, to form patches with both (B)
eS	extinction rate of sexual (S) patches
eB	extinction rate of patches containing both species (B)
eA	rate at which patches containing both species become sexual-only patches due to extinction of the asexuals