放牧对鹿鼠的影响及其对人类暴露于Sin Nombre病毒的影响。

Abigail J Leary, Amy J Kuenzi, Richard J Douglass
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引用次数: 0

摘要

利用被动集成应答器(PIT)技术和位于0.6 ha处理(放牧)和对照(不放牧)地块的小型模拟建筑物,研究了放牧对鹿鼠(Peromyscus maniculatus)进入建筑物的影响。在研究过程中进行了12次为期9天的试验。在这些试验中,在三个时间段(每3天)监测鼠标进入建筑物的运动。在试验区,这些时间段对应于马的放牧前、放牧和放牧后。在每次试验的9天内,放牧地和对照地的鹿鼠个体进入建筑物的数量随时间的推移而减少。在放牧前、放牧期和放牧后,雄性和雌性在对照地和处理地的人均出入口数量不同。在放牧地和对照地,3个时期雄性和雌性的入口/个体分布存在差异。放牧引起的生境改变似乎减少了建筑物内鹿鼠的活动(入口/个体),但不影响进入建筑物的老鼠数量。通过放牧或割草减少植被覆盖可能不会影响调查小型结构的小鼠数量,但放牧会对邻近的鹿鼠在结构中产生不同的活动模式。
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Grazing Effects on Deer Mice with Implications to Human Exposure to Sin Nombre Virus.

We examined the effects of grazing on deer mouse (Peromyscus maniculatus) movements into buildings using passive integrated transponder (PIT) technology and small simulated buildings located on 0.6-ha treatment (grazing) and control (no grazing) plots. Twelve experimental 9-day trials were conducted over the course of the study. During these trials, mouse movements into buildings were monitored during three time periods (each 3 days in length). In the treatment plots these time periods corresponded to pre-grazing, grazing, and post grazing by horses. The number of individual deer mice entering buildings over time decreased in both the grazed and control plots during the 9 days of each experiment. The number of entrances per/individual among the pre-grazing, grazing and post grazing periods was different between control and treated plots for both males and females. The distribution of entrances/individual among the three periods differed between males and females in both grazed and control plots. The habitat modification caused by grazing appeared to reduce deer mouse activity (entrances/individual) in buildings but does not affect the number of mice entering buildings. Reducing vegetative cover by grazing or mowing may not affect the number of mice investigating small structures but grazing creates different activity patterns in the structures for neighboring deer mice.

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