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首页> 外文期刊>Journal of Medical Entomology >Relative Humidity and Activity Patterns of Ixodes scapularis (Acari: Ixodidae)
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Relative Humidity and Activity Patterns of Ixodes scapularis (Acari: Ixodidae)

机译：肩I的相对湿度和活动模式（Acari：x科）

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摘要

Laboratory studies have shown clear relationships between relative humidity (RH) and the activity and survival of Ixodes scapularis Say (blacklegged tick). However, field studies have produced conflicting results. We examined this relationship using weekly tick count totals and hourly RH observations at three field sites, stratified by latitude, within the state of Rhode Island. Records of nymphal tick abundance were compared with several RH-related variables (e.g., RH at time of sampling and mean weekly daytime RH). In total, 825 nymphs were sampled in 2009, a year of greater precipitation, with a weighted average leaf litter RH recorded at time of sampling of 85.22%. Alternatively, 649 nymphs were collected in 2010, a year of relatively low precipitation, and a weighted average RH recorded at time of sampling was 75.51%. Negative binomial regression analysis of tick count totals identified cumulative hours <82% RH threshold as a significant factor observed in both years (2009: P = 0.0037; 2010: P < 0.0001). Mean weekly daytime RH did not significantly predict tick activity in either year. However, mean weekly daytime RH recorded with 1-wk lag before sample date was a significant variable (P = 0.0016) in 2010. These results suggest a lag effect between moisture availability and patterns of tick activity and abundance. Differences in the relative importance of each RH variable between years may have been due to abnormally wet summer conditions in 2009
机译：实验室研究表明，相对湿度（RH）与肩x小腿虾（黑脚tick）的活动和生存之间存在明确的关系。但是，实地研究产生了矛盾的结果。我们使用罗德岛州内三个按纬度分层的野外地点的每周滴答计数总数和每小时RH观测值检查了这种关系。将若虫壁虱丰度的记录与几个与RH相关的变量进行比较（例如，采样时的RH和日均RH）。在2009年（降水量较大的一年）中，总共采样了825个若虫，采样时记录的加权平均落叶RH为85.22％。另外，在相对低降水的一年2010年，收集到649份若虫，采样时记录的加权平均RH为75.51％。滴答计数总计的负二项回归分析确定了累积小时数<82％RH阈值是两年中观察到的重要因素（2009年：P = 0.0037; 2010年：P <0.0001）。在任何一年中，平均每周白天相对湿度均未显着预测tick活动。但是，2010年样本日期前1周滞后记录的每周平均RH是一个显着变量（P = 0.0016）在2010年。这些结果表明水分有效性与of活动和丰度模式之间存在滞后效应。年份之间每个RH变量相对重要性的差异可能是由于2009年夏季异常潮湿

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