Rabajante Jomar F, Tubay Jerrold M, Uehara Takashi, Morita Satoru, Ebert Dieter, Yoshimura Jin
1] Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, 432-8561, Japan [2] Mathematics Division, Institute of Mathematical Sciences and Physics, University of the Philippines Los Baños, College, Laguna 4031, Philippines.
Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, 432-8561, Japan.
Sci Rep. 2015 Apr 22;5:10004. doi: 10.1038/srep10004.
In host-parasite systems, dominant host types are expected to be eventually replaced by other hosts due to the elevated potency of their specific parasites. This leads to changes in the abundance of both hosts and parasites exhibiting cycles of alternating dominance called Red Queen dynamics. Host-parasite models with less than three hosts and parasites have been demonstrated to exhibit Red Queen cycles, but natural host-parasite interactions typically involve many host and parasite types resulting in an intractable system with many parameters. Here we present numerical simulations of Red Queen dynamics with more than ten hosts and specialist parasites under the condition of no super-host nor super-parasite. The parameter region where the Red Queen cycles arise contracts as the number of interacting host and parasite types increases. The interplay between inter-host competition and parasite infectivity influences the condition for the Red Queen dynamics. Relatively large host carrying capacity and intermediate rates of parasite mortality result in never-ending cycles of dominant types.
在宿主 - 寄生虫系统中，由于其特定寄生虫的效力增强，优势宿主类型最终预计会被其他宿主所取代。这导致宿主和寄生虫数量的变化呈现出交替优势的循环，称为红皇后动态。已证明少于三个宿主和寄生虫的宿主 - 寄生虫模型会呈现红皇后循环，但自然的宿主 - 寄生虫相互作用通常涉及许多宿主和寄生虫类型，从而导致一个具有许多参数的难以处理的系统。在此，我们展示了在没有超级宿主和超级寄生虫的条件下，具有十个以上宿主和专性寄生虫的红皇后动态的数值模拟。随着相互作用的宿主和寄生虫类型数量增加，红皇后循环出现的参数区域会收缩。宿主间竞争与寄生虫感染力之间的相互作用影响红皇后动态的条件。相对较大的宿主承载能力和中等的寄生虫死亡率会导致优势类型的无休止循环。
