Positive Periodic Solution of a Stage-Structured Species Model with Holling Type IV Functional Response and Cannibalism for Predator

Some species are cannibalistic and their lives can be divided into several stages. When this kind of species is predator, a stage-structured species model with time delay, Holling type IV functional response and cannibalism can be formulated. The sufficient condition for existence of positive periodic solution is obtained by using coincidence degree theory. Some new results are obtained.