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首页> 外文期刊>Freshwater science >Effects of nonnative Rainbow Trout on two species of endemic Mexican amphibians
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Effects of nonnative Rainbow Trout on two species of endemic Mexican amphibians

机译：非彩虹鳟鱼对两种地方墨西哥两栖动物的影响

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摘要

Introduction of nonnative salmonids into fishless aquatic ecosystems often can have negative effects on these ecosystems. Amphibians appear to be particularly susceptible to the introduction of trout. Nonnative Rainbow Trout (Oncorhynchus mykiss) have been introduced to Mexico, including to streams in the mountains around Mexico City that are home to several endemic Mexican amphibians. We examined the effect of Rainbow Trout on the distributions of 2 endemic Mexican amphibians, Ambystoma altamirani and Hyla plicata, in the Sierra de Las Cruces. Ambystoma altamirani was never found at sites with Rainbow Trout, and H. plicata was observed only once at sites with Rainbow Trout. Stream site characteristics, for the most part, did not vary among streams occupied by different species, suggesting environmental variables were not primarily responsible for the species distributions. Our results provide strong circumstantial evidence that the introduction of Rainbow Trout in streams in the Sierra de Las Cruces has a negative effect on the distribution of native Mexican amphibians.
机译：将非鲑鱼引入无鱼水生生态系统通常会对这些生态系统产生负面影响。两栖动物似乎特别容易受到鳟鱼的引入。没有非彩虹鳟鱼（Oncorhynchus mykiss）被介绍给墨西哥，包括在墨西哥城周围的山区溪流，这些城市是几个地方墨西哥两栖动物的家。我们在塞拉德拉斯克拉斯在塞拉德拉斯克拉斯审查了彩虹鳟鱼对2个地方墨西哥两栖动物分布的效果。 Ambystoma Altamirani从未在彩虹鳟鱼的遗址找到，H. Plicata仅在彩虹鳟鱼的地点观察一次。流域特征在大多数情况下，不同物种占据的溪流中没有变化，建议环境变量没有主要负责物种分布。我们的结果提供了强大的间接证据证明，塞拉德拉斯克拉斯溪流溪流中的虹鳟是对墨西哥大两栖动物的分布产生负面影响。

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