Seasonal Effects on a Beddington-DeAngelis Type Predator-Prey System with Impulsive Perturbations

Figure 6

Phase portraits of solutions for system (1.4) when 𝜆=0. (a) 𝑝=0.4, (b) 𝑝=3.1 (a 4𝜏-periodic solution), (c) 𝑝=4.

(a)

(b)

(c)