研究了一类在捕食者种群中带有传染病结构的周期非自治Holling-Tanner捕食者-食饵模型,证明了所有正初始值的解保持正值,并利用重合度理论、 Mawhin’s的连续性定理,得到了周期非自治系统正周期解存在的充分条件。
An epidemic model of a Holling-Tanner predator-prey system with epidemic in predator is dis-cussed in this paper. The solution with initial data always remains positive in its region. The sufficient condi-tions are easily established for the existence of positive periodic solutions, by the methods of coincidence de-gree and Mawhin’s continuation theorem.