Dynamics of a non-autonomous density-dependent predator-prey model with Beddington-DeAngelis type  

作　　者：Haiyin Li Zhikun She 

机构地区：[1]LMIB and School of Mathematics and Systems Science Beihang University, Beijing, P. R. China [2]Department of Mathematics and Information Henan University of Economics and Law Zhengzhou, P. R. China

出　　处：《International Journal of Biomathematics》2016年第4期15-39,共25页生物数学学报（英文版）

摘　　要：The goal of this paper is to investigate the dynamics of a non-autonomous density- dependent predator-prey system with Beddington-DeAngelis functional response, where not only the prey density dependence but also the predator density dependence are considered, such that the studied predator-prey system conforms to the realistically biological environment. We firstly introduce a sufficient condition for the permanence of the system and then use a specific set to obtain a weaker sufficient condition. Afterward, we provide corresponding conditions for the extinction of the system and the existence of boundary periodical solutions, respectively. ~rther, we get a sufficient condition for global attractiveness of the boundary periodic solution by constructing a Lyapunov function, arriving at the uniqueness of boundary periodic solutions since the uniqueness of boundary periodic solutions can be ensured by global attractiveness. Finally, based on the existence of positive periodic solutions, which can be ensured by the Brouwer fixed- point theorem, we provide a sufficient condition for the uniqueness of positive periodic solutions.

关 键 词：PERMANENCE Beddington-DeAngelis functional response global attractive-ness uniqueness of periodic solutions. 

分 类 号：Q141[生物学—生态学] TP242[生物学—普通生物学]