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

Figure 8

The time series and the portrait phase of the system (2) when 𝑟=0.5, 𝐾=15, 𝑎=100, 𝜇=0.5, 𝐷=0.01, ℎ=6, 𝜏=4, and (𝑥(0),𝑦(0))=(12,20).