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arXiv 1407.8477q-bio.PEcond-mat.stat-mech
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作为Lotka-Volterra竞争模型限制形式的遗传漂变模型

Models of genetic drift as limiting forms of the Lotka-Volterra competition model

George W. A. Constable, Alan J. McKane

摘要:

通过时标分离论证,探讨了Moran模型与随机Lotka-Volterra竞争(SLVC)模型之间的关系.对于中性系统,发现两者在长时间内是等价的。对于具有选择性压力的系统,它们的行为不同。有人认为,SLVC是更可取的Moran模型,因为在SLVC的人口规模是由竞争调节,而不是任意固定的Moran模型。因此,在莫兰模型中发现的与引入更复杂的过程(如选择)相关的模糊性得以避免。

英文摘要:

The relationship between the Moran model and stochastic Lotka-Volterra competition (SLVC) model is explored via timescale separation arguments. For neutral systems the two are found to be equivalent at long times. For systems with selective pressure, their behavior differs. It is argued that the SLVC is preferable to the Moran model since in the SLVC population size is regulated by competition, rather than arbitrarily fixed as in the Moran model. As a consequence, ambiguities found in the Moran model associated with the introduction of more complex processes, such as selection, are avoided.

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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