A5103058003- Wildlife Ecology and Conservation
- Vector-borne infectious diseases
- Viral Infections and Vectors
- Animal Ecology and Behavior Studies
- Rangeland and Wildlife Management
- Vector-Borne Animal Diseases
- Yersinia bacterium, plague, ectoparasites research
- Bartonella species infections research
- Species Distribution and Climate Change
- Animal Disease Management and Epidemiology
- Virology and Viral Diseases
- Zoonotic diseases and public health
- Rabies epidemiology and control
- Fire effects on ecosystems
- Genetic diversity and population structure
- Cannabis and Cannabinoid Research
- Ecology and biodiversity studies
- Dermatological diseases and infestations
- Veterinary medicine and infectious diseases
- Avian ecology and behavior
- Toxoplasma gondii Research Studies
- Environmental DNA in Biodiversity Studies
- Diphtheria, Corynebacterium, and Tetanus
- Insect and Pesticide Research
- Insurance, Mortality, Demography, Risk Management
University of California, Davis
2008-2024
US Forest Service
2021-2023
Pacific Southwest Research Station
2021
Integra (United States)
2018
California Department of Fish and Wildlife
2015
The Nature Conservancy
2015
University of California, Berkeley
2015
Indiana University of Pennsylvania
2011
Humboldt State University
2006-2009
The status of many carnivore populations is growing concern to scientists and conservationists, making the need for data pertaining distribution, abundance, habitat use ever more pressing. Recent developments in noninvasive research techniques - those that minimize disturbance animal being studied have resulted a greatly expanded toolbox wildlife practitioner.Presented straightforward readable style, Noninvasive Survey Methods Carnivores comprehensive guide researchers who seek conduct...
Anticoagulant rodenticide (AR) poisoning has emerged as a significant concern for conservation and management of non-target wildlife. The purpose these toxicants is to suppress pest populations in agricultural or urban settings. potential direct indirect exposures illicit use ARs on public community forest lands have recently raised fishers (Martes pennanti), candidate listing under the federal Endangered Species Act Pacific states. In an investigation threats fisher population persistence...
Abstract Secondary exposure of wildlife to pesticides has been well documented, yet is typically associated with agricultural or wildland‐urban interface areas. Wildlife in undeveloped areas generally presumed free from risk. In 2009, a male fisher was found dead the Sierra National Forest and subsequent necropsy revealed that animal died acute rodenticide poisoning. Follow‐up testing 85% carcasses recovered by two research projects previous three years tested positive for rodenticides....
Trypanosoma cruzi, the causative agent of Chagas' disease, is a substantial public health concern in Latin America. Although rare humans and domestic animals United States, T. cruzi commonly detected some wildlife species, most raccoons (Procyon lotor) Virginia opossums (Didelphis virginiana). To increase our understanding reservoir host species range geographic distribution, 11 mammals from six states spanning known (Arizona, California, Florida, Georgia, Missouri, Virginia) were tested for...
The liberalization of marijuana policies, including the legalization medical and recreational marijuana, is sweeping United States other countries. Marijuana cultivation can have significant negative collateral effects on environment that are often unknown or overlooked. Focusing state California, where by some estimates 60%–70% consumed in grown, we argue (a) environmental harm caused merits a direct policy response, (b) current approaches to governing inadequate, (c) neglecting discussion...
Wildlife populations of conservation concern are limited in distribution, population size and persistence by various factors, including mortality. The fisher (Pekania pennanti), a North American mid-sized carnivore whose range the western Pacific United States has retracted considerably past century, was proposed for threatened status protection late 2014 under Endangered Species Act Fish Service its West Coast Distinct Population Segment. We investigated mortality 167 fishers from two...
ABSTRACT Two species of Bartonella , a novel clarridgeiae -like bacterium and B. vinsonii subsp. berkhoffii were isolated from rural dogs gray foxes in northern California. A was 3 (1.7%) 182 22 (42%) 53 foxes, while 1 dog (0.5%) 5 (9.4%). PCR DNA sequence analyses the citrate synthase ( gltA ) gene 16S-23S intergenic spacer region suggested that strains infecting identical. Fifty-four (29%) 48 (89%) had reciprocal titers antibodies against spp. ≥64. The high prevalence bacteremia...
ABSTRACT Interspecific killing is common among carnivores and can have population‐level effects on imperiled species. The fisher ( Pekania [ Martes ] pennanti ) a rare forest carnivore in western North America candidate for listing under the United States Endangered Species Act. intraguild predation are poorly understood fishers potential threats to existing populations. We studied prevalence patterns of interspecific southern Sierra Nevada Coastal Range California. collected forensic...
Gabriel, M. W., L. V. Diller, J. P. Dumbacher, G. Wengert, Higley, R. H. Poppenga, and S. Mendia. 2018. Exposure to rodenticides in Northern Spotted Barred Owls on remote forest lands northwestern California: evidence of food web contamination. Avian Conservation Ecology 13(1):2. https://doi.org/10.5751/ACE-01134-130102
The first case of canine endocarditis caused by "Bartonella rochalimae" is reported. By PCR-restriction fragment length polymorphism, sequence, and phylogenetic analyses, Bartonella isolates from a dog with endocarditis, 22 gray foxes, three dogs, described as B. clarridgeiae like, were confirmed to belong the new species "B. rochalimae," suggesting canids natural reservoir.
Bartonella spp. are fastidious, gram-negative, rod-shaped bacteria and usually vector-borne. However, the vector has not been definitively identified for many recently described species. In northern California, gray foxes (Urocyon cinereoargenteus) infected with two zoonotic species, B. rochalimae vinsonii subsp. berkhoffii. Fleas (range 1-8 fleas per fox) were collected from 22 (41.5%) of 54 urban backcountry zones near Hoopa, California. The flea species determined, DNA was individually...
Marijuana (Cannabis spp.) growing operations (MGO) in California have increased substantially since the mid-1990s. One environmental side-effect of MGOs is extensive use anticoagulant rodenticides (AR) to prevent damage marijuana plants caused by wild rodents. In association with a long-term demographic study, we report on an observation brodifacoum AR exposure threatened species, northern spotted owl (Strix occidentalis caurina), found freshly dead within 669–1347 m at least seven active...
Many demographic parameters of imperiled fishers (Martes pennanti) in the Pacific Northwest remain poorly understood but are necessary to develop conservation strategies; herein we report on fisher reproduction, recruitment, and dispersal Hoopa Valley Indian Reservation, California, help fill key knowledge gaps. Forty radiocollared, breeding-age females exhibited denning behavior 80 (87%) 92 opportunities between 2005 2011. Twenty-eight female weaned offspring 55 (65%) 85 adequately...
Four fishers (Martes pennanti) from an insular population in the southern Sierra Nevada Mountains, California, USA died as a consequence of infection with canine distemper virus (CDV) 2009. Three were found close temporal and spatial relationship; fourth fisher 4 mo later at 70 km distance initial group. Gross lesions restricted to hyperkeratosis periocular skin ulcera-tion footpads. All animals had necrotizing bronchitis bronchiolitis syncytia intracytoplasmic inclusion bodies. Inclusion...
Identifying predators of threatened and endangered species is important for understanding reducing the impacts predation. Visible evidence collected from a carcass alone often insufficient to accurately identify predator species. The DNA left on allows definitive identification associated with carcass, but can be difficult isolate independently prey. We developed field collection molecular protocols amplifying canid felid saliva fisher (Martes pennanti) carcasses without itself. tested...
Abstract Pesticide use is pervasive and the exposure of non-target wildlife has been well documented over past half-century. Among pesticides, anticoagulant rodenticides (AR) have emerged as a particularly important threat in forests western United States, with mortality reported for several species conservation concern. To further quantify this threat, we collected specimens Barred Owls (Strix varia) Owl x Spotted hybrids from Klamath Cascade Mountains Sierra Nevada California, USA to...
Between 0 and 50 per cent of the dogs in eight rural villages far northern California with a high risk tickborne diseases were seropositive for Anaplasma phagocytophilum Bartonella vinsonii subspecies berkhoffii , between 10 Borrelia burgdorferi . The odds ratio co‐exposure individual to B A was 18·2. None associated sex dogs, whether they slept out doors, or tick‐preventive measures taken. When assessed landscape factors, particularly seroprevalence observed village at relatively altitude...
Understanding the role of disease in population regulation is important to conservation wildlife. We evaluated prevalence Toxoplasma gondii exposure and Sarcocystis spp. infection 46 road-killed accidentally trapper-killed fisher (Martes pennanti) carcasses collected stored at -20 C by Pennsylvania Game Commission from February 2002 October 2008. Blood samples were assayed for T. antibodies using modified agglutination test (MAT, 1 : 25) an indirect immunofluorescent antibody (IFAT, 128)....
The order Piroplasmida contains a diverse group of intracellular parasites, many which can cause significant disease in humans, domestic animals, and wildlife. Two piroplasm species have been reported from raccoons (Procyon lotor), Babesia lotori (Babesia sensu stricto clade) related to microti (called B. microti-like sp.). goal this study was investigate prevalence, distribution, diversity raccoons. We tested selected regions the United States Canada for presence sp. piroplasms. Infections...
Although granulocytic anaplasmosis, caused by infection of Anaplasma phagocytophilum, is an emerging human and domestic animal disease, the ecology natural history parasite not well understood. Gray foxes (Urocyon cinereoargenteus) are relatively common, occasionally peri-urban mesocarnivores whose geographic distribution overlaps reported anaplasmosis in humans animals North America. We evaluated potential as hosts reservoirs A. phagocytophilum both urban backcountry habitats Hoopa Valley...
Abstract Effects of historical fire suppression in forested ecosystems, combined with increasingly frequent and prolonged periods drought due to a changing climate, are predicted drive increases the extent intensity wildfires western North America elsewhere. Understanding effects on forest‐dependent species interactions among is important for conservation management decisions. We used data collected from long‐term carnivore monitoring program northern California southern Oregon, USA...