Local amphibian populations at the edge of a species range are possibly of greater conservation concern than any other amphibians group. They experience greater demographic fluctuation than populations at the core of the range. We detected the most suitable distribution range of R. macrocnemis by maximum entropy (MaxEnt) method at the end of the southeastern edge of natural distribution range to find out which environmental variables have a significant role in determining the distribution pattern of this species in marginal populations. According to the map constructed, three important variables had a high contribution to species presence as land cover (63.4%), annual precipitation (27%), and precipitation of coldest quarter of the year (5.4%) variables. Then, we described new methods for estimating detection probability for terrestrial frogs, specifically R. macrocnemis. Finally, we estimated the population size of mountain frogs by calculated detection probability. Our repeated capture–re-capture (RCR) results suggest that the estimated detection probability for R. macrocnemis is: \(\widehat{p} = 0.052\). Thus, the total average number of R. macrocnemis obtained from the 17 habitat sites is 982.5 adults (range: 708–1211 adults). In conclusion, the population estimates by detection probability index are generally much higher than densities reported for the Mountain frog populations than visual encounter estimation about 50.5 adults (range: 37–63 adults).

中文翻译：

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一种新的山蛙蛙分布范围末端的概率检测和种群数量估计方法（Boulenger，1885年）

在物种范围边缘的本地两栖动物种群可能比任何其他两栖动物种群都更关注保护问题。他们的人口波动要比该范围的核心人口大。我们通过最大熵（MaxEnt）方法在自然分布范围东南边缘的末端检测到了最适宜的大麦R分布范围，以找出哪些环境变量在决定该物种在边缘种群中的分布方式方面具有重要作用。根据构建的地图，三个重要变量对物种的存在具有很高的贡献，如土地覆盖（63.4％），年降水量（27％）和一年中最冷的季度的降水量（5.4％）。变量。然后，我们描述了一种新的方法，用于估计陆地蛙，特别是大肠蛙的检测概率。最后，我们通过计算出的检测概率来估计山蛙的种群数量。我们的重复捕获-重新捕获（RCR）结果表明，大棒金龟的估计检测概率为：\（\ widehat {p} = 0.052 \）。因此，从这17个栖息地获得的大圆角象的总平均数量为982.5只成年人（范围：708-1211只成年人）。总之，通过检测概率指数估算的种群数量通常比报告的山蛙种群密度要高得多，大约比目视相遇估算的成年人数量高50.5（范围：37-63个成年人）。