On the Nature of Bifurcation in a Ratio-Dependent Predator-Prey Model with Delays

Figure 2

Trajectory portrait and phase portrait of system (57) with 𝜏₁=0, 𝜏₂=2.5>𝜏₂₀≈2.3345. Hopf bifurcation occurs from the positive equilibrium 𝐸(5.61,7.02). The initial value is (5.6, 7.45).

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