A5017761400- Wildlife Ecology and Conservation
- Rangeland and Wildlife Management
- Ecology and biodiversity studies
- Rangeland Management and Livestock Ecology
- Species Distribution and Climate Change
- Animal Ecology and Behavior Studies
- Ecology and Vegetation Dynamics Studies
- Forensic Fingerprint Detection Methods
- Wildlife-Road Interactions and Conservation
- Fire effects on ecosystems
- Nanofabrication and Lithography Techniques
- Genetic and phenotypic traits in livestock
- Physical Unclonable Functions (PUFs) and Hardware Security
- Recycling and Waste Management Techniques
- Avian ecology and behavior
- Animal Behavior and Welfare Studies
- Milk Quality and Mastitis in Dairy Cows
- Vector-Borne Animal Diseases
- Genetic diversity and population structure
- Engineering Applied Research
- Viral Infections and Vectors
- Animal Disease Management and Epidemiology
- Polymer Science and PVC
- Surface Modification and Superhydrophobicity
- Ruminant Nutrition and Digestive Physiology
Colorado Parks and Wildlife
2011-2025
University of Montana
2020
Montana State University
2005-2008
Mitel (Canada)
2007
National Park Service
2005
Yellowstone National Park
2005
St. Olaf College
2005
Montana Fish, Wildlife & Parks
2005
Within predator-prey systems behavior can heavily influence spatial dynamics, and accordingly, the theoretical study of how dynamics relate to stability within these has a rich history. However, our understanding behaviors in large mammalian is poorly developed. To address relationship between predator selection patterns, prey density, vulnerability, we quantified patterns for two fine-scale recovering wolf (Canis lupus) population Yellowstone National Park, Wyoming, USA. Wolf data were...
In the absence of natural or anthropogenic disturbance, many pinyon pine (Pinus edulis)–Utah juniper (Juniperus osteosperma) woodland habitats reach late seral stages that encroach into forest openings. This encroachment typically occurs at expense browse species are preferred by mule deer (Odocoileus hemionus). Wildlife managers often treat habitat management as a tool to bolster populations, but documented changes in vital rates response manipulations lacking. We evaluated effects...
Movement is a fundamental aspect of animal ecology that varies across space, time, and among individuals or groups within population. Broad-scale patterns movement are often classified into different strategies, such as resident, nomadic, migratory. While landscape-level environmental can predict the presence strategies in an area, elucidating how these downscale to fine-scale resource selection behaviors remains challenge. Partially migratory systems, where both migrants residents coexist,...
The suite of demands competing for wildlife management funds necessitates direct assessment decisions, especially when these decisions have costs, as well tangible opportunity costs. We conducted a mark–resight study that estimated mule deer (Odocoileus hemionus) density across multiple units in southwest Colorado had been exposed to different intensities habitat treatments. Our treatments were comprised common techniques including hydro-axe and roller-chopper disturbances chemical control...
Abstract Land‐use change due to anthropogenic development is pervasive across the globe and commonly associated with negative consequences for biodiversity. While land‐use has been linked shifts in behavior habitat‐use patterns of wildlife species, little known about its influence on animal population dynamics, despite relevance such information conservation. We conducted first broad‐scale investigation correlating temporal demographic rates mule deer, an iconic species western United States...
By migrating, ungulates take advantage of cyclical fluctuations in resources, which allows them to persist at greater population numbers than they would the absence these seasonal movements. We sought identify drivers spring elk (Cervus canadensis) migration and evaluate how well individuals were able optimize access forage prior departure, while upon arrival on summer range. Specifically, we investigated timing duration four Colorado herds test quality snow dynamics pre-, during,...
Abstract Observed links between parasites, such as ticks, and climate change have aroused concern for human health, wildlife population dynamics, broader ecosystem effects. The one‐host life history of the winter tick ( Dermacentor albipictus ) each annual cohort to environmental conditions during three specific time periods when they are predictably vulnerable: spring detachment from hosts, summer larval stage, fall questing hosts. We used mixed‐effects generalized linear models investigate...
Although numerous authors are investigating indirect effects of wolf recovery, the most fundamental ecological impact Greater Yellowstone Area reintroduction, predation on ungulate populations, remains unclear. We report a 5-year comparative study (Canis lupus)-elk (Cervus elaphus) dynamics an elk herd in headwaters Madison River within National Park and lower that winters 40 km downriver outside Park. A resident pack became established area 1997 grew to multiple packs totaling 30–40 animals...
Abstract Our understanding of factors that limit mule deer ( Odocoileus hemionus ) populations may be improved by evaluating neonatal survival as a function dam characteristics under free‐ranging conditions, which generally requires both neonates and dams are radiocollared. The most viable technique facilitating capture from radiocollared adult females is use vaginal implant transmitters (VITs). To date, VITs have allowed research opportunities were not previously possible; however, often...
The relationships between habitat, body condition, life history characteristics, and fitness components of ungulates are interwoven interest to researchers as they strive understand the impacts a changing environment. With increased availability portable ultrasound machines refinement hormonal assays, assessment ungulate condition has become an accessible monitoring strategy. We employed scoring, estimation % ingesta-free fat (%IFBF), free thyroid hormones (FT4 FT3), pregnancy, metrics...
Abstract We evaluated the biological and socio‐economic effects of statewide limitation mule deer ( Odocoileus hemionus ) hunting licenses, which began in Colorado 1999. implemented a before‐after‐control‐impact (BACI) analysis annual helicopter sex age class surveys, collected as part Division Wildlife's routine monitoring, to assess changes adult male/adult female ratios fawn/adult response this change harvest management. Following reduction license sales (1999–2006), we observed increases...
Abstract Subspecies designations within temperate species’ ranges often reflect populations that were isolated by past continental glaciation, and glacial vicariance is believed to be a primary mechanism behind the diversification of several subspecies North American cervids. We used genetics fossil record study phylogeography three moose (Alces alces andersoni, A. a. gigas, shirasi) in western America. sequenced complete mitochondrial genome (16,341 base pairs; n = 60 moose) genotyped 13...
Abstract Encounters between animals occur when are close in space and time. important many ecological processes including sociality, predation disease transmission. Despite this, there is little theory regarding the spatial distribution of encounters no formal framework to relate environmental characteristics encounters. The probability encounter could be estimated with resource selection functions (RSFs) by comparing locations where occurred available they may have occurred, but this...
Wildlife management agencies are obliged to provide evidence‐based recommendations stakeholders. However, allocation of resources towards the species is rarely uniform. The consideration life‐history characteristics moose offers wildlife managers a more robust understanding population ecology, while also providing insight into potential limiting factors for long‐term management. From 2014–2020 we simultaneously measured survival adult female moose, as well calf productivity, in relation...
Survey data improve population management, yet those often have associated bias. We quantified one source of bias in moose survey (observer detection probability, p), by using repeated ground-observations calves-at-heel radio-collared Colorado, USA. Detection probabilities, which varied both spatially and temporally, were estimated an occupancy-modelling framework. provide efficient offset for modelled calf-at-heel occupancy (ψ) estimates that accommodates summer calf mortality....
ABSTRACT The use of ultrasonograhic measurements muscle and body fat represent a relatively new data stream that can be used to address questions regarding ungulate condition. We have learned presumably overall condition among individual animals, even those taken from the same herd at time, are highly variable. Relatively little consideration has been given sources variation in other physiological parameters wildlife populations. evaluated components late‐winter mule deer ( Odocoileus...
Abstract Across much of North America, populations moose ( Alces alces ) are declining because disease, predation, climate change, and anthropogenic‐driven habitat loss. Contrary to this trend, in Colorado, USA, have continued grow. Studying successful (i.e., persistent or growing) can facilitate conservation by identifying features critical persistence moose. We hypothesized that using with higher quality willow Salix spp.) would a probability having calf‐at‐heel calving success). evaluated...
ABSTRACT Wildlife biologists capture deer ( Odocoileus spp.) annually to attach transmitters and collect basic information (e.g., animal mass sex) as part of ongoing research monitoring activities. Traditional techniques induce stress in animals can be expensive, inefficient, dangerous. They are also impractical for some urbanized settings. We designed evaluated a device mule O. hemionus ) that automatically attached an expandable radiocollar ≥6‐month‐old fawn recorded the fawn's sex,...
Ion implantation is one of many critical processes in the fabrication semiconductor devices. While device geometries have been shrinking, implant dose has typically increasing. Historically, photoresist removal achieved through a combination plasma “ashing” and subsequent wet clean, often using mixture sulfuric acid hydrogen peroxide at elevated temperature. The “piranha” or SPM strip followed by an ammonia based clean such as APM to remove particles sulfate residues from device. However,...