In this paper, a mathemat ical model is proposed to study the effect of exotic predator population on a system of native prey-predator population. The model includes three state variables viz., density of native prey, density of native predator and density of exotic predator. The stability analysis of all the feasible equilibria are carried out and also the possibility of Hopf-bifu rcation of the interior equilibriu m point is investigated for the parameter 2 ; the predation rate of exotic predator. By vary ing the parameter 2 , a change in stability behaviour of the interior equilibriu m is also observed. The stability and direction of bifurcating periodic solution is discussed. Finally the analytical results are supported by numerical simulat ion.
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