Bifurcation and chaotic behavior of a discrete-time predator-prey system

The dynamics of a discrete-time predator-prey system is investigated in the closed first quadrant R(+)(2). It is shown that the system undergoes flip bifurcation and Neimark-Sacker bifurcation in the interior R(+)(2) by using a center manifold theorem and bifurcation theory. Numerical simulations are presented not only to illustrate our results with the theoretical analysis, but also to exhibit the complex dynamical behaviors, such as orbits of period 7, 14, 21, 63, 70, cascades of period-doubling bifurcation in orbits of period 2. 4, 8, quasi-periodic orbits and chaotic sets. These results show far richer dynamics of the discrete model compared with the continuous model. Specifically, we have stabilized the chaotic orbits at an unstable fixed point using the feedback control method. (C) 2010 Elsevier Ltd. All rights reserved.