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The dynamics of a predator-prey system with state-dependent feedback control. (English) Zbl 1243.34061
Summary: A Lotka-Volterra-type predator-prey system with state-dependent feedback control is investigated in both theoretical and numerical ways. Using the Poincaré map and the analogue of the Poincaré criterion, sufficient conditions for the existence and stability of semitrivial periodic solutions and positive periodic solutions are obtained. In addition, we show that there is no positive periodic solution with period greater than and equal to three under some conditions. The qualitative analysis shows that the positive period-one solution bifurcates from the semitrivial solution through a fold bifurcation. Numerical simulations to substantiate our theoretical results are provided. Also, the bifurcation diagrams of solutions are illustrated by using the Poincaré map, and it is shown that the chaotic solutions take place via a cascade of period-doubling bifurcations.
MSC:
34C60Qualitative investigation and simulation of models (ODE)
92D25Population dynamics (general)
93B52Feedback control
34C05Location of integral curves, singular points, limit cycles (ODE)
34C23Bifurcation (ODE)
34C28Complex behavior, chaotic systems (ODE)