Variation in individual temperature preferences, not behavioural fever, affects susceptibility to chytridiomycosis in amphibians

Variation in individual temperature preferences, not behavioural fever, affects susceptibility to chytridiomycosis in amphibians
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影响两栖动物壶菌病易感性的因素是个体温度偏好的变化,而不是行为发热

DOI:
10.1098/rspb.2018.1111
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发表时间:
2018
期刊:
Proceedings of the Royal Society B: Biological Sciences
影响因子:
--
通讯作者:
Rohr, Jason R.
Rohr, Jason R.
中科院分区:
--
文献类型:
--
作者:
Sauer, Erin L.;Fuller, Rebecca C.;Richards-Zawacki, Corinne L.;Sonn, Julia;Sperry, Jinelle H.;Rohr, Jason R.

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野生动物种群对新型病原体做出快速反应的能力对于减轻气候变化中疾病爆发的影响至关重要。实地研究表明,喜欢温暖温度的两栖动物不太可能感染真菌病原体Batrachochytrium dendrobatidis (Bd)。然而,目前尚不清楚这种现象是由行为发热还是热偏好的自然变化引起的。在这里,我们将青蛙置于热梯度中,测试温度偏好并测量受感染动物的生长、流行率和存活率。尽管个体和物种层面的温度偏好存在显着差异,但我们没有发现五个青蛙物种存在行为发烧的一致证据。有趣的是,对于喜欢较高温度的物种,个体的偏好温度与宿主的生长呈负相关,而对于喜欢较低温度的物种则相反。我们的结果表明,热偏好的变化,而不是行为发烧,可能会影响个体和群体的感染结果,从而可能导致选择个体宿主和宿主物种,其温度偏好会最大限度地减少宿主的生长并提高宿主在流行病期间的生存率。
The ability of wildlife populations to mount rapid responses to novel pathogens will be critical for mitigating the impacts of disease outbreaks in a changing climate. Field studies have documented that amphibians preferring warmer temperatures are less likely to be infected with the fungal pathogenBatrachochytrium dendrobatidis(Bd). However, it is unclear whether this phenomenon is driven by behavioural fever or natural variation in thermal preference. Here, we placed frogs in thermal gradients, tested for temperature preferences and measuredBdgrowth, prevalence, and the survival of infected animals. Although there was significant individual- and species-level variation in temperature preferences, we found no consistent evidence of behavioural fever across five frog species. Interestingly, for species that preferred warmer temperatures, the preferred temperatures of individuals were negatively correlated withBdgrowth on hosts, while the opposite correlation was true for species preferring cooler temperatures. Our results suggest that variation in thermal preference, but not behavioural fever, might shape the outcomes ofBdinfections for individuals and populations, potentially resulting in selection for individual hosts and host species whose temperature preferences minimizeBdgrowth and enhance host survival during epidemics.
DOI: --
发表时间: 2017
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影响因子: 2.5
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