Total aggression in allocolonial confrontations between parabiotic partners assays, pooled for variety combinations. Data are from , given as proportions in relation to the total number of interactions. The numbers above each plot indicate the overall number of replicates and the number of colony combinations tested. P values are given according to GLMs with binomial error distribution. (a) Cr. modiglianii towards Ca. rufifemur, (b) Ca. rufifemur towards Cr. modiglianii.