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Zbl 1146.34057
Liu, Shengqiang; Zhang, Jianhua
Coexistence and stability of predator-prey model with Beddington-DeAngelis functional response and stage structure. (English)
[J] J. Math. Anal. Appl. 342, No. 1, 446-460 (2008). ISSN 0022-247X

Authors' abstract: We present a predator-prey model of Beddington-DeAngelis type functional response with stage structure on prey. The constant time delay is the time taken from birth to maturity about the prey. By the uniform persistence theories and monotone dynamic theories, sharp threshold conditions which are both necessary and sufficient for the permanence and extinction of the model as well as the sufficient conditions for the global stability of the coexistence equilibria are obtained. Biologically, it is proved that the variation of prey stage structure can affect the permanence of the system and drive the predator into extinction by changing the prey carrying capacity: Our results suggest that the predator coexists with prey permanently if and only if predator's recruitment rate at the peak of prey abundance is larger than its death rate; and that the predator goes extinct if and only if predator's possible highest recruitment rate is less than or equal to its death rate; furthermore, our results also show that a sufficiently large mutual interference by predators can stabilize the system.
[Fuhua Ling (Milpitas)]
MSC 2000:
*34K60 Applications of functional-differential equations
34K20 Stability theory of functional-differential equations
92D25 Population dynamics
34K25 Asymptotic theory of functional-differential equations

Keywords: delay; predator interference; stage structure; Beddington-DeAngelis

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