Spatial Distribution of Larval Ixodes scapularis (Acari: Ixodidae) on Peromyscus leucopus and Microtus pennsylvanicus at Two Island Sites

1997 ◽  
Vol 83 (2) ◽  
pp. 207 ◽  
Author(s):  
Daniel Markowski ◽  
Kerwin E. Hyland ◽  
Howard S. Ginsberg ◽  
Renjie Hu
Author(s):  
Francesca I. Rubino ◽  
Kelly Oggenfuss ◽  
Richard S. Ostfeld

Physical impairments are widely assumed to reduce the viability of individual animals, but their impacts on individuals within natural populations of vertebrates are rarely quantified. By monitoring wild populations of white-footed mice over 26 years, we assessed whether missing or deformed limbs, tail or eyes influenced the survival, body mass, movement and ectoparasite burden of their bearers. Of the 27 244 individuals monitored, 543 (2%) had visible physical impairments. Persistence times (survival) were similar between mice with and without impairments. Mice with eye and tail impairments had 5% and 6% greater mass, respectively, than unimpaired mice. Mice with tail impairments had larger home ranges than did unimpaired mice. Burdens of black-legged ticks ( Ixodes scapularis ) were higher among mice with tail and limb impairments while burdens of bot fly larvae ( Cuterebra ) were higher among mice with cataracts compared to mice without impairments. Our findings do not support the presupposition that physical impairments reduce viability in their bearers and are inconsistent with the devaluation of impaired individuals that pervaded early thinking in evolutionary biology.


Author(s):  
Megan A Linske ◽  
Scott C Williams ◽  
Kirby C Stafford ◽  
Andrew Y Li

Abstract Integrated tick management (ITM) is a comprehensive strategy used to reduce presence of ticks and their associated pathogens. Such strategies typically employ a combination of host and non-host targeted treatments which often include fipronil-based, rodent-targeted bait boxes. Bait boxes target small-bodied rodents, specifically white-footed mice (Peromyscus leucopus Rafinesque) that not only play a crucial role in the blacklegged tick (Ixodes scapularis Say (Ixodida: Ixodidae)) life cycle, but also in the transmission of numerous pathogens, primarily Borrelia burgdorferi Johnson, Schmid, Hyde, Steigerwalt & Brenner (Spirochaetales: Spirochaetaceae), the causal agent of Lyme disease. This study aimed to determine the effect of bait box deployment configuration on tick burden reduction while also further exploring bait consumption and P. leucopus abundances as measures of bait box usage and effectiveness. Boxes were deployed on nine properties within each of six neighborhoods (n = 54) in two different configurations: grid and perimeter. Multiple factors were analyzed as potential predictors for reduction in tick burdens using a backward stepwise selection procedure. Results confirmed the perimeter configuration was a more effective deployment strategy. In addition, overall P. leucopus abundance was a significant predictor of tick burden reduction while bait consumption was not. These findings not only further support the recommended perimeter deployment configuration but provide insight into effective utilization in areas of high P. leucopus abundance. The identification of this significant relationship, in addition to configuration, can be utilized by vector control professionals and homeowners to make informed decisions on bait box placement to make sustained impacts on the I. scapularis vector and associated pathogens within an ITM framework.


2020 ◽  
Vol 13 (1) ◽  
Author(s):  
David M. Poché ◽  
Gregory Franckowiak ◽  
Tyler Clarke ◽  
Batchimeg Tseveenjav ◽  
Larisa Polyakova ◽  
...  

1984 ◽  
Vol 12 (4) ◽  
pp. 435-440 ◽  
Author(s):  
Terrance Davin ◽  
Raymond P. Morgan ◽  
George A. Feldhamer

1996 ◽  
Vol 77 (1) ◽  
pp. 266-273 ◽  
Author(s):  
R. S. Ostfeld ◽  
M. C. Miller ◽  
K. R. Hazler

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