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首页> 外文期刊>Journal of Parasitology >ENVIRONMENTAL FACTORS INFLUENCING TREMATODE PREVALENCE IN GREY TREE FROG (HYLA VERSICOLOR) TADPOLES
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ENVIRONMENTAL FACTORS INFLUENCING TREMATODE PREVALENCE IN GREY TREE FROG (HYLA VERSICOLOR) TADPOLES

机译：影响灰树蛙（HYLA VERSICOLOR）羽衣甘菊三甲虫流行的环境因素

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摘要

The emergence or increased prevalence of various parasites may be linked to alterations in host—parasite interactions caused by environmental changes. We investigated prevalence of trematode infections in grey tree frog (Hyla versicolor) tadpoles from ponds in nonagricultural settings versus ponds adjacent to cornfields in southern Ontario. We found that agricultural activity was a significant factor in determining the percentage of tadpoles infected by 1 or more trematodes from 1 or more species (combined trematode infection). However, we found no associations between combined trematode infection and forest cover; pond size; road density; and measures of water quality, such as nitrate level and the presence of the herbicide atrazine. Although combined trematode prevalence was associated only with agricultural activity, prevalence of Alaria species showed a positive association with forest cover. This latter result probably reflects the importance of habitat suitability for the canid definitive hosts of this trematode species.
机译：各种寄生虫的出现或流行可能与环境变化引起的宿主－寄生虫相互作用的改变有关。我们调查了非农业环境池塘与安大略省南部玉米田附近池塘的灰色树蛙（Hyla versicolor）t中的吸虫感染情况。我们发现，农业活动是确定ad被1个或更多物种（合并的吸虫感染）的1个或多个吸虫感染的百分比的重要因素。但是，我们没有发现综合性吸虫感染与森林覆盖率之间的关联。池塘大小道路密度和水质的衡量标准，例如硝酸盐水平和除草剂at去津的存在。尽管综合吸虫流行仅与农业活动有关，但疟疾种类的流行与森林覆盖率呈正相关。后一结果可能反映了该吸虫物种的犬科定型寄主适合生境的重要性。

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