在掠食者-猎物模型中探索独特的动态,在猎物中使用一般主义的掠食者和群体防御
Vaibhava Srivastava1, Kwadwo Antwi-Fordjour2, Rana D Parshad1
1Department of Mathematics, Iowa State University, Ames, Iowa 50011, USA.
Chaos (Woodbury, N.Y.)
|January 9, 2024
概括
这项研究引入了一种具有群体防御的掠食者-猎物模型,揭示了捕食者的有限时间膨胀和猎物的火. 数字分析探讨了吸引力和分叉的盆地,延迟模型确保了全球现有的解决方案.
科学领域:
- 数学生物学 数学生物学
- 生态建模 生态建模
- 动态系统 动态系统
背景情况:
- 捕食者-猎物模型对于理解生态动态至关重要.
- 现有的模型通常假设更简单的捕食者反应和猎物行为.
- 莱斯利-高尔方案和通用的功能反应是生态建模的关键组成部分.
研究的目的:
- 为了研究一种新的捕食者-猎物模型,该模型包含一个通用主义的捕食者 (修改的莱斯利-高尔) 和用群体防御 (通用反应) 捕食的猎物.
- 在这个生态模型中分析有限时间膨胀和火现象的潜力.
- 探索模型参数和延迟对人口动态和稳定性的影响.
主要方法:
- 开发和数学分析修改的莱斯利-高尔捕食者-猎物模型.
- 使用理论分析对有限时间膨胀和火的研究.
- 数字模拟来探索吸引力盆地,分叉和限制周期.
- 对全球解决方案存在模型的延迟版本的分析.
主要成果:
- 该模型展示了捕食者群体的有限时间膨胀和猎物群体的有限时间火,这是一个新的发现.
- 爆发和火时间被证明是一致的.
- 数字模拟揭示了复杂的动态,包括丰富的分叉导致多个极限周期.
- 群体防御指数显著影响了膨胀解决方案的吸引力盆地.
- 一个延迟的模型变体保证了所有初始条件的全球现有解决方案.
结论:
- 修改后的捕食者-猎物模型提供了比以前研究的模型更丰富的动态行为,包括有限时间的膨胀和火.
- 捕食者食策略和猎物群体防御之间的相互作用极大地影响了种群动态.
- 数字探索为系统的稳定性和长期行为提供了关键的见解.
- 推迟的引入使系统稳定,确保可预测的人口动态.
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