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首页> 外文期刊>The Herpetological journal >Susceptibility of newly-metamorphosed frogs to a pathogenic water mould (Saprolegnia sp.)
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Susceptibility of newly-metamorphosed frogs to a pathogenic water mould (Saprolegnia sp.)

机译：新变态的青蛙对病原体水霉菌（Saprolegnia sp。）的敏感性

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摘要

Recent losses of worldwide biodiversity include population declines and extinctions in many amphibian populations. Many factors, including pathogens, are contributing to amphibian population declines. One pathogen, a water mould of the genus Saprolegnia, causes mortality in early life stages of amphibians and may contribute to the declines of specific amphibian populations. Most of our knowledge of how Saprolegnia affects amphibians comes from studies of embryos. The effects of Saprolegnia on post-metamorphic amphibians are poorly known. Therefore, in the laboratory, we investigated the susceptibility of newly-metamorphosed juvenile amphibians to Saprolegnia in four frog species: Bufo boreas (western toad), Pseudacris regilla (Pacific treefrog), Rana aurora (red-legged frog) and R. cascadae (Cascades frog). We found that juvenile R. cascadae exposed to Saprolegnia had greater rates of mortality than unexposed controls. In the other species, survival was also lower in the Saprolegnia treatments compared with controls but these differences were not statistically significant. Combined effects of Saprolegnia in both embryonic and juvenile stages may make the populations of R. cascadae especially vulnerable.
机译：最近全球生物多样性的丧失包括许多两栖动物种群的减少和灭绝。许多因素，包括病原体，助长了两栖动物数量的下降。一种病原体，即腐殖质属的水霉菌，会导致两栖动物在生命的早期阶段死亡，并可能导致特定两栖动物种群的减少。我们对腐烂症如何影响两栖动物的大多数知识来自对胚胎的研究。腐烂症对变质后两栖动物的影响知之甚少。因此，在实验室中，我们研究了新变态的两栖类幼虫对腐烂症的易感性，其中四种蛙属为：蟾蜍（西蟾蜍），雷氏假单胞菌（太平洋树蛙），极光蛙（红脚蛙）和鼠尾草（R. cascadae）。级联青蛙）。我们发现暴露于腐烂菌的幼年级联体的死亡率高于未暴露的对照组。在其他物种中，腐烂症治疗的存活率也比对照组低，但这些差异在统计学上并不显着。腐霉菌在胚胎期和幼年期的综合作用可能使级联R. cadcadae的种群特别脆弱。

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