James C. Beasley

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Baylisascaris procyonis roundworms, a parasite of raccoons, can infect humans, sometimes fatally. Parasite eggs can remain viable in raccoon latrines for years. To develop a management technique for parasite eggs, we tested anthelmintic baiting. The prevalence of eggs decreased at latrines, and larval infections decreased among intermediate hosts,(More)
The objective of this study was to characterize the antibody prevalence of important livestock and domestic animal pathogens in raccoons (Procyon lotor) trapped and sampled in 39 forest patches in north-central Indiana, USA, between 2004 and 2005. A total of 459 serum samples were tested for antibodies to Leptospira serovars, 512 for Canine distemper virus(More)
Despite the widespread use of aerial baiting to manage epizootics among free-ranging populations, particularly in rabies management, bait acceptance and seroconversion rates often are lower than required to eliminate spread of disease. Our objectives in this study, therefore, were to evaluate the performance of stratified bait distribution models derived(More)
Mass aerial delivery of dead mouse baits treated with acetaminophen has been evaluated as a means to reduce brown tree snake (Boiga irregularis) populations over large areas, increasing the likelihood of wide-scale eradication on Guam. Given the high density of snakes in some areas of their invasive range, eradication efforts could result in a resource(More)
Twelve polymorphic microsatellite loci were developed for the American dog tick (Dermacentor variabilis), an important vector of infectious diseases in humans and animals. Four multiplexed panels comprising the loci were developed and 45 ticks collected from two raccoons (Procyon lotor) were genotyped. The number of alleles per locus ranged from nine to 30,(More)
Population genetics is increasingly being used to study the biology of parasites at the scales of both the host (infrapopulation, IP) and host population (component population, CP). In this study we tested three mechanistic hypotheses that could explain deviations from Hardy-Weinberg equilibrium (HWE) expectations due to heterozygote deficits (HDs) at the(More)
R824 Current Biology 25, R811–R826, Octob N.C. and 15-34-50151 as a scholarship for A.P.), Zoological Institute of Russian Academy of Sciences (research grant 01201351182), St. Petersburg State University (research grant 1.37.149.2014 to N.C.), The VolkswagenStiftung (Lichtenberg professorship to H.M.), the German Research Foundation (DFG) (MO 1408/2-2 to(More)
Although numerous studies have examined habitat use by raccoons (Procyon lotor), information regarding seasonal habitat selection related to resource availability in agricultural landscapes is lacking for this species. Additionally, few studies using radiotelemetry have investigated habitat selection at multiple spatial scales or core-use areas by raccoons.(More)
Anthropogenic pollutants disrupt global biodiversity, and terrestrial sentinels of pollution can provide a warning system for ecosystem-wide contamination. This study sought to assess whether raccoons (Procyon lotor) are sentinels of local exposure to trace element contaminants at a coal fly ash site and whether exposure resulted in health impairment or(More)
Human land-use practices have dramatically altered the composition and configuration of native habitats throughout many ecosystems. Within heterogeneous landscapes generalist predators often thrive, causing cascading effects on local biological communities, yet there are few data to suggest how attributes of fragmentation influence local population dynamics(More)