Bifurcation analysis in a diffusive predator–prey system with Michaelis–Menten-type predator harvesting

Qiannan Song, Ruizhi Yang, Chunrui Zhang, Leiyu Tang
2018 Advances in Difference Equations  
In this paper, we consider a modified predator-prey model with Michaelis-Menten-type predator harvesting and diffusion term. We give sufficient conditions to ensure that the coexisting equilibrium is asymptotically stable by analyzing the distribution of characteristic roots. We also study the Turing instability of the coexisting equilibrium. In addition, we use the natural growth rate r 1 of the prey as a parameter and carry on Hopf bifurcation analysis including the existence of Hopf
more » ... on, bifurcation direction, and the stability of the bifurcating periodic solution by the theory of normal form and center manifold method. Our results suggest that the diffusion term is important for the study of the predator-prey model, since it can induce Turing instability and spatially inhomogeneous periodic solutions. The natural growth rate r 1 of the prey can also affect the stability of positive equilibrium and induce Hopf bifurcation. MSC: 34K18; 35B32
doi:10.1186/s13662-018-1741-5 fatcat:2wipyelm4fbwtgpsv6hxro4pzi