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arXiv 1612.04049q-bio.PEmath.PR
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确定突变体入侵适应度和进化奇异策略的数值方法

A numerical approach to determine mutant invasion fitness and evolutionary singular strategies

Coralie Fritsch, Fabien Campillo, Otso Ovaskainen

摘要:

我们提出了一种数值方法来研究入侵适应度的突变体,并确定进化奇异策略的进化结构模型中的竞争排斥原则。我们的方法是基于一个双重表示,其中包括一个随机模型和计算其相应的确定性模型的小尺寸的突变体人口的建模。确定性模型的使用极大地方便了入侵可行性的数值判定以及演化奇异策略的收敛稳定性。我们的方法结合了标准的自适应动态与突变体的生存标准之间的联系在随机模型和相应的确定性模型的特征值的符号。我们提出了我们的方法的背景下,大规模结构的个人为基础的恒化器模型。我们利用先前推导的数学关系的随机和确定性表示的突变种群的恒化器模型,推导出一个通用的数值方法,用于分析入侵适应度的随机模型。我们的方法可以应用到广泛的类的进化模型,可以建立随机和确定性的入侵适合度之间的联系。

英文摘要:

We propose a numerical approach to study the invasion fitness of a mutant and to determine evolutionary singular strategies in evolutionary structured models in which the competitive exclusion principle holds. Our approach is based on a dual representation, which consists of the modelling of the small size mutant population by a stochastic model and the computation of its corresponding deterministic model. The use of the deterministic model greatly facilitates the numerical determination of the feasibility of invasion as well as the convergence-stability of the evolutionary singular strategy. Our approach combines standard adaptive dynamics with the link between the mutant survival criterion in the stochastic model and the sign of the eigenvalue in the corresponding deterministic model. We present our method in the context of a mass-structured individual-based chemostat model. We exploit a previously derived mathematical relationship between stochastic and deterministic representations of the mutant population in the chemostat model to derive a general numerical method for analyzing the invasion fitness in the stochastic models. Our method can be applied to the broad class of evolutionary models for which a link between the stochastic and deterministic invasion fitnesses can be established.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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