一类捕食者具有传染病的时滞生态模型
Analysis of a Delayed Predator⁃prey Model with Disease in the Predator
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摘要: 研究了一类捕食者内部传播疾病且带时滞的捕食系统. 分析了非负不变集、边界平衡态和正平衡态.当时滞 τ 足够小时,无病平衡点和正平衡点是局部渐近稳定的,随着时滞的增加,将产生 Hopf 分支.Abstract: A system of delayed functional differential equations was proposed as a predator⁃prey model with diseasein the predator. The invariance of non⁃negativity, nature of boundary equilibria and the positive equilibrium were analyzed. It was showed that the disease⁃free and the positive equilibrium are locally asymptotically stable when time delay τ is suitable small, while a loss of stability by a Hopf bifurcation can occur as the delays increase.