PERIODIC SOLUTION FOR DIFFUSIVE PREDATOR-PREY PATCH SYSTEMS WITH TIME DELAY AND PERIODIC STOCKING

摘要

＜正＞ In this paper, a three species difFusive predator-prey modei with functional response and periodic stocking is studied, where all parameters are time depen-dent. By using new theorem of coincidence degree theory, the existence of a positive periodic solution for this system is established.