TY - JOUR

T1 - Stabilization due to predator interference: Comparison of different analysis approaches

AU - van Voorn, George

AU - Stiefs, Dirk

AU - Gross, Thilo

AU - Kooi, Bob

AU - Feudel, Ulrike

AU - Kooijman, Sebastiaan A. L. M.

PY - 2008

Y1 - 2008

N2 - We study the influence of the particular form of the functional response in two-dimensional predator-prey models with respect to the stability of the non-trivial equilibrium. This equilibrium is stable between its appearance at a transcritical bifurcation and its destabilization at a Hopf bifurcation giving rise to periodic behavior. Based on local bifurcation analysis we introduce a classification of stabilizing effects. The classical Rosenzweig-MacArthur model can be classified as weakly stabilizing, undergoing the paradox of enrichment, while the well-known Beddington-DeAngelis model can be classified as strongly stabilizing. Under certain conditions we obtain a complete stabilization resulting in an avoidance of limit cycles. Both models, in their conventional formulation, are compared to a generalized, steady-state independent two-dimensional version of these models, based on a previously developed normalization method. We show explicitly how conventional and generalized models are related and how to interpret the results from the rather abstract stability analysis of generalized models.

AB - We study the influence of the particular form of the functional response in two-dimensional predator-prey models with respect to the stability of the non-trivial equilibrium. This equilibrium is stable between its appearance at a transcritical bifurcation and its destabilization at a Hopf bifurcation giving rise to periodic behavior. Based on local bifurcation analysis we introduce a classification of stabilizing effects. The classical Rosenzweig-MacArthur model can be classified as weakly stabilizing, undergoing the paradox of enrichment, while the well-known Beddington-DeAngelis model can be classified as strongly stabilizing. Under certain conditions we obtain a complete stabilization resulting in an avoidance of limit cycles. Both models, in their conventional formulation, are compared to a generalized, steady-state independent two-dimensional version of these models, based on a previously developed normalization method. We show explicitly how conventional and generalized models are related and how to interpret the results from the rather abstract stability analysis of generalized models.

M3 - Article (Academic Journal)

VL - 5

SP - 567

EP - 583

JO - Mathematical Biosciences and Engineering

JF - Mathematical Biosciences and Engineering

SN - 1547-1063

IS - 3

ER -