F(2) and 11(2) are shown. For single mating the corresponding dynamics of policing Intensity with gradual evolution are also shown. We use the forms Pat= 1 - P +P7 and 2(21= I +Ca+ (1/2)C222. For eadi of the four panels. we set: (a) F" = 0.5. C. =0.2. Co =O. corresponding to Zs = I: (b) P - 0.8. CI -0.1, C2 - O