From: Evolution of female carotenoid coloration by sexual constraint in Carduelis finches
Model | Step 1: Brownian motion | Step 2: Block reversed sexual dichromatism | Step 3: Simulate constraint |
---|---|---|---|
Constraint on females | M = MP + R | M = MP | M = MP |
 | F = FP + R | if FP > MP, then, F = MP, else, F = FP | F = FP + C*(MP - FP) |
Constraint on males | as above | F = FP | F = FP |
 |  | if FP > MP, then, M = FP, else, M = MP | M = MP + C*(FP - MP) |
Mutual constraint | as above | if FP > MP, then, M = (MP + FP)/2, and F = (MP + FP)/2, | M = MP + C*(FP - MP) |
 |  | else, M = MP, and F = FP | F = FP + C*(MP - FP) |