%0 Journal Article %T Multiple positive periodic solutions for a food-limited two-species ratio-dependent predator-prey patch system with delay and harvesting %A Hui Fang %J Electronic Journal of Differential Equations %D 2012 %I Texas State University %X By using Mawhin's coincidence degree theory, this paper establishes some sufficient conditions on the existence of four positive periodic solutions for a food-limited two-species ratio-dependent predator-prey patch system with delay and harvesting. Some novel techniques are employed to obtain the appropriate a priori estimates. An example is given to illustrate our results. %K Coincidence degree %K periodic solution %K food-limited supply %K predator-prey patch system %K harvesting rate %U http://ejde.math.txstate.edu/Volumes/2012/150/abstr.html