A5063060492- Wildlife Ecology and Conservation
- Rangeland and Wildlife Management
- Animal Ecology and Behavior Studies
- Species Distribution and Climate Change
- Ecology and Vegetation Dynamics Studies
- Avian ecology and behavior
- Genetic diversity and population structure
- Wildlife-Road Interactions and Conservation
- Fire effects on ecosystems
- Marine animal studies overview
- Animal Disease Management and Epidemiology
- Ecology and biodiversity studies
- Virology and Viral Diseases
- Forest Management and Policy
- Fish Ecology and Management Studies
- Rabies epidemiology and control
- Mechanical Engineering and Vibrations Research
- Soil Mechanics and Vehicle Dynamics
- Animal Behavior and Welfare Studies
- Winter Sports Injuries and Performance
- Zoonotic diseases and public health
- Archaeology and Cultural Heritage
- Animal Virus Infections Studies
- Human-Animal Interaction Studies
- Animal Behavior and Reproduction
Oregon State University
2017-2025
California State Polytechnic University
2023
Wildlife Conservation Society
2006-2015
University of Massachusetts Amherst
2010-2011
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...
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...
The acquisition of behavior in animals is a function both inheritance and learning, where learning can occur asocially (independent other animals), socially (by observing or both. For species that have prolonged parent–offspring relationship live solitary adult lives, social between parents offspring may be dominant form learning. If avenue for acquiring if inherited, then behaviors confer significant fitness advantages should lead to subpopulations genetically related individuals with...
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...
ABSTRACT Understanding animal space use can inform management and conservation, particularly in landscapes where conservation of imperiled species must be balanced with resource by humans. We used GPS collar data to evaluate fisher ( Pekania pennanti ) behavior at multiple spatial scales relation a multi‐scale vegetation structure the southern Cascade mountains Oregon, USA. From 2015 2018, we estimated 9 individual fishers collared during 25 deployments. To whether affected within areas,...
The management of human–American black bear (Ursus americanus) conflict has been significant concern for Yosemite National Park (YNP) personnel since the 1920s. managers implemented YNP Human–Bear Management Plan in 1975 an effort to reduce human–bear conflicts, especially extensively developed Valley (YV). We used scat analysis estimate annual and seasonal food habits bears YV during 2001–02. assessed success efforts availability anthropogenic foods, including garbage, by examining changes...
Determining how species coexist is critical for understanding functional diversity, niche partitioning and interspecific interactions. Identifying the direct indirect interactions among sympatric carnivores that enable their coexistence particularly important to elucidate because they are integral maintaining ecosystem function. We studied effects of removing nine fishers (Pekania pennanti) on population dynamics used this perturbation fishers, grey foxes (Urocyon cinereoargenteus) ringtails...
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...
Abstract Estimating density and population size is often more challenging than measuring indices of abundance because uncertainty about the effective area surveys. We combined hierarchical modeling detection/non‐detection data from camera stations with auxiliary information on home range sizes to address this issue. used approach estimate total fishers ( Pekania pennanti ) throughout largest remaining native (Northern California Southern Oregon [NCSO], 48,760 km 2 species in Pacific States...
The impacts of tourism, most notably food resource enrichment and harassment, have led to alterations in natural bear (Ursus sp.) behavior many National Parks throughout the United States. Comprehensive efforts reduce these restore activity patterns been elements US Park management for decades. We described black (U. americanus) during 2001 2002 assess influence human centers on Yosemite Park, California, USA. found movement patterns, habitat use, distance bears were located from developed...
Abstract We developed 22 new microsatellite loci for the fisher ( Martes pennanti ), a North American mesocarnivore. The were with samples from southern Sierra Nevada Mountains in California, and screened this population four other populations. observed range of six to 21 polymorphic per population, exhibiting markedly lower levels variation compared four.
Abstract Selection of habitat characteristics by reproductive females during neonate development can mediate the influence adverse environmental conditions on fitness offspring. Previous research has suggested that cavities and burrows used for reproduction cavity-obligate species offer thermoregulatory benefits, access to prey, limit predation pressure. As fishers (Pekania pennanti) are secondary breeders, we hypothesized they select particular den at discrete stages offspring biotic...
Abstract We used a mark–resight design to calculate density estimates of fisher ( Martes pennanti ), candidate for listing under the United States Endangered Species Act, on Hoopa Valley Indian Reservation in northwestern California, USA order determine population status 1998 and 2005. Our estimation results simultaneous population‐monitoring data provided post hoc opportunity evaluate relative efficacy 3 classical indexing techniques (catch‐per‐unit‐effort, frequency detection at camera...
Accurate and precise population estimates are necessary to answer many management questions, but these generally unavailable for large carnivores because of their extensive movements, low densities, secretive natures. These traits also often prevent the bounding occupied areas estimate densities. We used a modified Petersen mark–recapture methodology black bear density in 1998 at 2 study sites on Hoopa Valley Reservation, California, from mark–resight data. culvert traps capture,...
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...
Conservation concern for fishers (Pekania [Martes] pennanti) in the Pacific states has highlighted a need to develop cost-effective methods of monitoring reproduction extant and reintroduced fisher populations. We evaluated efficacy nipple size as predictive index weaning success females with known reproductive histories from 3 study areas California. captured radiocollared 91 female on 146 occasions between 2004 2011 measured width height all 4 nipples quantified status via radiotelemetry....
We developed and tested a system that alerts personnel when radiocollared animal enters an area designated as off-limits. The remote alarm combines the monitoring capabilities of data loggers with message transmitter sends voice via 2-way radios monitored area. food-conditioned American black bears (Ursus americanus) in Yosemite National Park by setting up 6 alarms areas off-limits to (i.e., campgrounds parking lots) alternated nights transmitters on were activated. recorded number times...
Wildlife managers often need to assess the current health status of wildlife communities before implementation management actions involving surveillance, reintroductions, or translocations. We estimated sensitivity and specificity a commercially available domestic canine rapid diagnostic antigen test for parvovirus enzyme-linked immunosorbent assay detection antibodies toward Anaplasma phagocytophilum on populations fishers (Martes pennanti) sympatric gray foxes (Urocyon cinereoargenteus)....
Understanding the role of landscapes managed for timber production in conservation forest-obligate species is a priority preserving ecological integrity and fostering socioeconomic wellbeing. The forest characteristics generally associated with survival, reproduction, persistence (e.g., large-diameter trees, standing dead understory vegetation, downed logs) are often believed to be at odds production. One such fisher (Pekania pennanti), mesocarnivoran (member order Carnivora) mature whose...
North American Porcupines (Erethizon dorsatum) have a broad geographic distribution across much of the continent, but recent evidence suggests that their populations may be declining in some areas, including Pacific Northwest. Estimating baseline historical and contemporary distributions is necessary for initiating monitoring efforts and, if necessary, informing strategic conservation actions. We compiled 1905 occurrence records Washington, Oregon, northern California from 1908 to 2018....