Abstract This paper models the population dynamics and competition of two sympatric species of lizards Liolaemus cyanogaster and Liolaemus tenuis under the following scenarios: (a) population dynamics of each species, (b) competition to thermoregulate, and (c) competition for the substrate. The hypothesis was that a variant of the Lotka–Volterra model is able to explain patterns related to population dynamics and competition between both species. The data used come from a study carried out between spring and autumn of 2011, 2012 and 2013, in the Chilean locality of Nonguen Valley. With these data we estimate the number of individuals of each species as well as their body temperature and the place where it was found (on the ground or higher). The model analyzed was appropriate for the three scenarios studied and it described a parsimonious coexistence between the species and a point of equilibrium that turned out to be an asymptotically stable attractor; that is, if these species start with a certain initial amount, they will always reach an equitable final amount.

中文翻译：

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Lotka-Volterra 模型在竞争中应用于 Liolaemus 的两个同域物种

摘要 本文模拟了两种同域蜥蜴 Liolaemus cyanogaster 和 Liolaemus tenuis 在以下情况下的种群动态和竞争：（a）每个物种的种群动态，（b）体温调节的竞争，以及（c）底物的竞争。假设是 Lotka-Volterra 模型的一个变体能够解释与种群动态和两个物种之间的竞争相关的模式。所使用的数据来自于 2011 年、2012 年和 2013 年春秋期间在智利农根谷地区进行的一项研究。有了这些数据，我们估计了每个物种的个体数量、体温和发现地点（地面或更高处）。所分析的模型适用于所研究的三种情况，它描述了物种与平衡点之间的简约共存，该平衡点被证明是渐近稳定的吸引子；也就是说，如果这些物种以某个初始数量开始，它们将始终达到公平的最终数量。