Bifurcation for a functional yield chemostat when one competitor produces a toxin

Amodel, with general yield functions: Fi(S), i = 1, 2, of competition in the chemostat of two competitors for a single nutrient when one of the competitors produces toxin against its opponent is studied in this paper. The conditions in terms of the relevant parameters for the Hopf bifurcation of the three-dimensional system have been proved, which implies the existence of limit cycles in the 3-D system. © 2006 Elsevier Inc. All rights reserved.