Periodic solutions of delayed predator-prey model with the Beddington-DeAngelis functional response

By using the continuation theorem based on Gaines and Mawhin's coincidence degree, sufficient and realistic conditions are obtained for the global existence of positive periodic solutions for a delayed predator-prey model with the Beddington-DeAngelis functional response. Our results are applicable to state dependent and distributed delays. (c) 2006 Elsevier Ltd. All rights reserved.