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首页> 外文会议>4th international symposium of integrative zoology : Biological Consequences of Global Change: Data Analysis amp; Sharing. >Effects of temperature and hydric environment on survival of the Panamanian Golden Frog infected with a pathogenic chytrid fungus
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Effects of temperature and hydric environment on survival of the Panamanian Golden Frog infected with a pathogenic chytrid fungus

机译：温度和水环境对感染病原性chytrid真菌的巴拿马金蛙存活的影响

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Considerable controversy exists concerning whether or not climate changes (particularly global warming) are causing outbreaks of a lethal amphibian pathogen,the chytrid fungus Batrachochytrium dendrobatidis (Longcore,Pessier & D.K. Nichols 1999). In the present study,groups of Panamanian golden frogs (Atelopus zeteki Dunn,1993),a critically endangered amphibian thought to be nearly extinct in Panama,were exposed to varying dosages of zoospores of Batrachochytrium dendrobatidis,temperatures and hydric environments in order to learn whether this species is susceptible to this pathogen and,if so,how environmental factors affect survival. This pathogen proved to be highly lethal for A. zeteki. Frogs exposed to a dosage of 100 Bd zoospores survived significantly (P<0.0001) longer than those that had been exposed to 104 or 106 zoospores. Exposed frogs housed at 23 ℃ survived significantly (P<0.0001) longer than those that were housed at 17 ℃. Exposed frogs held in dry conditions survived significantly longer than those in wet conditions (P<0.0001). As a laboratory study,these results do not directly test hypotheses about the relation between climate change and the decline of these frogs in the field,but they inform the discussion about how environmental conditions can have an impact on the interaction between a susceptible amphibian and this pathogen. These data do not support the contention that rising global temperatures are necessary to cause the death of amphibians infected with this pathogen because the pathogen was equally lethal at 17 as at 23 ℃,and frogs at the warmer temperature lived significantly longer than those at the cooler one.
机译：关于气候变化（尤其是全球变暖）是否引起致命的两栖性病原体，乳糜菌Batrachochytrium dendrobatidis的爆发，存在着很多争议（Longcore，Pessier和D.K. Nichols，1999年）。在本研究中，被认为在巴拿马几乎已灭绝的极度濒危的两栖动物-巴拿马金蛙群（Atelopus zeteki Dunn，1993），被暴露于不同剂量的梭状芽孢杆菌的孢子，温度和水环境中，以了解是否该物种对这种病原体很敏感，如果这样，环境因素如何影响其生存。该病原体被证明对zeteki高度致死。暴露于100 Bd游动孢子剂量的青蛙比暴露于104或106个游动孢子的青蛙存活时间长（P <0.0001）。与在17℃饲养的青蛙相比，在23℃饲养的暴露青蛙的存活时间长（P <0.0001）。在干燥条件下饲养的暴露青蛙比在潮湿条件下生存的青蛙长得多（P <0.0001）。作为一项实验室研究，这些结果并未直接检验关于气候变化与这些青蛙在田间衰落之间关系的假设，但它们为有关环境条件如何影响易感两栖动物与这种两栖动物之间相互作用的讨论提供了参考。病原。这些数据不支持这样的论点，即全球温度升高是造成感染该病原体的两栖动物死亡的必要条件，因为该病原体在17和23℃时具有相同的致死性，并且温度较高的青蛙的寿命比温度较低的青蛙更长。一。

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