Periodic Solutions and Homoclinic Bifurcations of Two Predator-Prey Systems with Nonmonotonic Functional Response and Impulsive Harvesting

Figure 9

The time series and the portrait phase of the system (1) when 𝑟=0.5, 𝐾=15, 𝑎=100, 𝜇=0.8, 𝐷=0.038, and (𝑥(0),𝑦(0))=(12,20).