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首页> 外文期刊>Chelonian conservation and biology >Conservation Status and Sex Ratios of the Coahuila Box Turtle (Terrapene coahuila) in the Cuatro Cienegas Valley of Coahuila, Mexico, 2011-2018
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Conservation Status and Sex Ratios of the Coahuila Box Turtle (Terrapene coahuila) in the Cuatro Cienegas Valley of Coahuila, Mexico, 2011-2018

机译：Coahuila Coahuila，Mexico，2011-2018的Coahuila龟（Terrapene Cohuila）的保护状况和性别比例

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摘要

The Coahuila box turtle (Terrapene coahuila) is an endangered species of chelonian endemic to the Cuatro Cienegas valley in northern Mexico. It is the only aquatic member of the genus Terrapene and is dependent on permanent and seasonal wetlands. Over the past several decades, T coahuila populations have declined from habitat loss as the wetlands have dried due to human modification of the valley. We conducted a survey of the status of the species from 2011 to 2018, updating previous estimates of population density and overall population size. We also collected data on sex ratio in each of the 8 wetland study areas in the valley and report a strongly male-biased sex ratio. Our results indicate a total population size of approximately 1791 individuals, based on recorded densities from 0.24 to 3.3 individuals/ha among 539.76 ha of suitable habitat in the 8 wetland areas. This estimate is lower than previous studies indicated, implying direct effects of habitat loss on T. coahuila. If habitat loss due to lowering of the water table continues, this species will become extinct. We recommend conservation measures including upgrading the species' International Union for Conservation of Nature Red List status to Critically Endangered, protecting and restoring key wetlands in the valley, and establishing captive assurance colonies in Mexico.
机译：Coahuila Box Turtle（Terrapene Coahuila）是墨西哥北部Cuatro Cienegas山谷的Chelonian流行的濒危物种。它是Tritapene属的唯一水生成部分，依赖于永久和季节性湿地。在过去的几十年中，由于湿地由于人类修改而干燥，Coahuila人口从栖息地损失下降。我们从2011年到2018年对物种状况进行了调查，更新了以前的人口密度和整体人口规模的估计。我们还收集了山谷8湿地研究区域中的每一个的性别比例，并报告了强烈的男性偏见的性别比例。我们的结果表明，总人口总数约为1791人，基于0.24至3.3个个人/公顷的记录密度，在8次湿地地区的合适栖息地中的539.76公顷。这种估计低于以前的研究表明，暗示栖息地损失对Coahuila的直接影响。如果持续下降导致的栖息地损失，这种物种将灭绝。我们建议保护措施，包括升级物种国际联盟，以保护自然红色名单地位，以危及危害，保护和恢复谷的主要湿地，并在墨西哥建立俘虏保证殖民地。

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