Introduction - If you have any usage issues, please Google them yourself
Abstract:In this paper,we study the dynamic behavior of a class of predator prey system with stage-structure and
Beddington-DeAngelis functional response.Under certain assumptions,sut~cient an d necessary conditions which
guaran tee the predator and the prey species to be permanent are obtained.In addition,the suficient conditions are
derived for the existence of positive period ic solutions to the syste