中文摘要：

主要研究了一类被捕食者含有非线性收获的比率依赖捕食被捕食系统的多种分支问题，如鞍一结点分支、Hopf分支、B-T分支等．和已有的结果比较，非线性收获的出现使得系统的动力学性质更加复杂．

英文摘要：

The existences of multiple bifurcationsfor a ratio dependent predator prey system with nonlinear harvestingare has been studied, such as saddle node bifurcation, Hopfbifurcation, B-T bifurcation etc. Compared with the existing results, the presence of nonlinear harvesting of the system let thedynamical properties of the system become more complicated.