Enhanced call effort in Japanese tree frogs infected by amphibian chytrid fungus
Enhanced call effort in Japanese tree frogs infected by amphibian chytrid fungus
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DOI：
10.1098/rsbl.2016.0018
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发表时间：
2016-03-01
期刊：
影响因子：
3.3
通讯作者：
Waldman, Bruce
中科院分区：
文献类型：
--
作者：
An, Deuknam;Waldman, Bruce
一些两栖动物已经进化出对与全球人口下降有关的毁灭性疾病壶菌病的抵抗力，但免疫防御可能是昂贵的。我们记录了雄性日本树蛙（Hyla japonica）在野外的广告叫声。然后，我们评估了个体是否感染了该疾病的病原菌-树枝状芽孢杆菌（Bd）。这使我们能够分析男性的呼叫属性作为其感染状态的函数。感染的男性呼吁更迅速，并产生更长的通话时间比未感染的男性。这种增强的呼叫努力可能反映了病原体操纵宿主行为以促进疾病传播。或者，增加呼叫可能是由于选择受感染的男性更早繁殖，因为他们的预期寿命缩短。我们的研究结果提高了Bd的亚致死效应改变两栖动物生活史的可能性，这有助于长期的人口下降。
Some amphibians have evolved resistance to the devastating disease chytridiomycosis, associated with global population declines, but immune defences can be costly. We recorded advertisement calls of male Japanese tree frogs (Hyla japonica) in the field. We then assessed whether individuals were infected by Batrachochytrium dendrobatidis (Bd), the causal agent of the disease. This allowed us to analyse call properties of males as a function of their infection status. Infected males called more rapidly and produced longer calls than uninfected males. This enhanced call effort may reflect pathogen manipulation of host behaviour to foster disease transmission. Alternatively, increased calling may have resulted from selection on infected males to reproduce earlier because of their shortened expected lifespan. Our results raise the possibility that sublethal effects of Bd alter amphibian life histories, which contributes to long-term population declines.