应用重合度延拓定理和一些不等式技巧，研究了一类时间尺度上带有收获项的三种群捕食-食饵系统，得到其至少存在八个正周期解的充分条件，并用一个例子验证了所得结果的有效性。%In this paper,a general class of predator-prey system with harvesting terms on time scales is studied by u-sing Mawhin′s continuation theorem of coincidence degree theory and some skills of inequalities.The sufficient condition is established for the existence of at least eight positive periodic solutions.An example is given to illustrate the effectiveness of the result.
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