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首页> 外文期刊>Parasitology >Interactions of warming and exposure affect susceptibility to parasite infection in a temperate fish species
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Interactions of warming and exposure affect susceptibility to parasite infection in a temperate fish species

机译：变暖和暴露的相互作用影响温带鱼类对寄生虫感染的敏感性

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Predicting how elevated temperatures from climate change alter host-parasite interactions requires understandings of how warming affects host susceptibility and parasite virulence. Here, the effect of elevated water temperature and parasite exposure level was tested on parasite prevalence, abundance and burden, and on fish growth, using Pomphorhynchus laevis and its fish host Squalius cephalus. At 60 days post-exposure, prevalence was higher at the elevated temperature (22 degrees C) than ambient temperature (18 degrees C), with infections achieved at considerably lower levels of exposure. Whilst parasite number was significantly higher in infected fish at 22 degrees C, both mean parasite weight and parasite burden was significantly higher at 18 degrees C. There were, however, no significant relationships between fish growth rate and temperature, parasite exposure, and the infection parameters. Thus, whilst elevated temperature significantly influenced parasite infection rates, it also impacted parasite development rates, suggesting warming could have complex implications for parasite dynamics and host resistance.
机译：预测气候变化引起的高温如何改变宿主-寄生虫的相互作用，需要了解变暖如何影响宿主的易感性和寄生虫的毒力。在这里，使用蓬蓬鱼及其鱼类寄主Squalius cephalus，测试了升高的水温和寄生虫暴露水平对寄生虫患病率，丰度和负担以及鱼类生长的影响。暴露后60天，升高的温度（22摄氏度）比环境温度（18摄氏度）的患病率更高，感染的暴露水平要低得多。虽然在22摄氏度时受感染的鱼类中的寄生虫数量显着较高，但在18摄氏度时平均寄生虫重量和寄生虫负担均显着较高。但是，鱼的生长速度和温度，寄生虫暴露与感染之间没有显着关系。参数。因此，尽管温度升高对寄生虫感染率有显着影响，但同时也影响了寄生虫的发生率，这表明变暖可能会对寄生虫动力学和宿主抵抗力产生复杂影响。

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