具有脉冲投放捕食者阶段结构时滞的捕食-食饵模型

讨论了具有阶段结构脉冲时滞的HollinglI功能反应的捕食模型，其中天敌（益虫）进行人工脉冲周期投放，害虫具有阶段结构及成熟期的时滞现象，并进行了系统的数学及生物方面的研究．利用脉冲及时滞微分方程的基本知识证明了该害虫根除周期解的唯一性和全局吸引性．进一步证明了当天敌的投放量或者投放周期在一定的范围内，能够控制害虫在作物的经济危害水平（EIL）运行的情况下使天敌与害虫可以共存．得出的结论为害虫治理提供了策略基础．

Stage-Structured Predator-Prey Model with Delay and Impulsive Perturbations on Predator

In this paper, Predator-prey model of a stage structured impulse delay HollingII functional response ,in which predator（natural enemy ）is released impulsively and the prey has stage structured and maturation time delay ,and we perform a systematic mathematical and ecological study, we obtain that the pest-eradication periodic solution is unique and globally attractive by using the basis of impulse and delay differential equation. Further ,we prove that if the pulse releasing rate or impulsive period for natural enemy is within an appropriate range,then the pest population can be controlled under the economic injury level（EIL）E, that is, the pest population and the natural enemy population may coexist. The results provide reliable tactical basis for the practical pest management.