Search results for: Justin W. Fischer

Items from 1 to 13 out of 13 results

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Locating and eliminating feral swine from a large area of fragmented mixed forest and agriculture habitats in north-central USA

Richard M. Engeman, Bradley E. Wilson, Scott F. Beckerman, Justin W. Fischer, more

Environmental Science and Pollution Research > 2019 > 26 > 2 > 1654-1660

Illinois is one of the US states where elimination of feral swine (Sus scrofa) was determined practical, as only a few isolated populations were established. A particularly important step towards feral swine elimination from Illinois was to eliminate the population in Fulton County. We describe the approaches applied to systematically detect, locate, and eliminate feral swine in a successful county-wide...

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Attractants for wild pigs: current use, availability, needs, and future potential

Michael J. Lavelle, Nathan P. Snow, Justin W. Fischer, Joe M. Halseth, more

European Journal of Wildlife Research > 2017 > 63 > 6 > 1-14

Populations of wild pigs (Sus scrofa) are burgeoning around the globe, and they are currently the target of extensive research and management efforts. Wild pigs are a highly successful invasive species that cause extensive damage to agriculture and native plant and animal communities. Lethal control is the most common management strategy used to reduce wild pig populations and their damage, and many...

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Quantifying drivers of wild pig movement across multiple spatial and temporal scales

Shannon L. Kay, Justin W. Fischer, Andrew J. Monaghan, James C. Beasley, more

Movement Ecology > 2017 > 5 > 1 > 1-15

Background The movement behavior of an animal is determined by extrinsic and intrinsic factors that operate at multiple spatio-temporal scales, yet much of our knowledge of animal movement comes from studies that examine only one or two scales concurrently. Understanding the drivers of animal movement across multiple scales is crucial for understanding the fundamentals of movement ecology, predicting...

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Effects of simulated removal activities on movements and space use of feral swine

Justin W. Fischer, Dan McMurtry, Chad R. Blass, W. David Walter, more

European Journal of Wildlife Research > 2016 > 62 > 3 > 285-292

Abundance and distribution of feral swine (Sus scrofa) in the USA have increased dramatically during the last 30 years. Effective measures are needed to control and eradicate feral swine populations without displacing animals over wider areas. Our objective was to investigate effects of repeated simulated removal activities on feral swine movements and space use. We analyzed location data from 21...

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Deer response to exclusion from stored cattle feed in Michigan, USA

Michael J. Lavelle, Campa III Henry, Kyle LeDoux, Patrick J. Ryan, more

Preventive Veterinary Medicine > 2015 > 121 > 1-2 > 159-164

Disease and damage from white-tailed deer (Odocoileus virginianus) continually threaten the livelihood of agricultural producers and the economy in the United States, as well as challenge state and federal wildlife managers. Threats can be partially addressed by excluding free-ranging deer from livestock-related resources. Throughout the year, use of stored livestock feed by deer in northern Lower...

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Is there a single best estimator? Selection of home range estimators using area-under-the-curve

W David Walter, Dave P Onorato, Justin W Fischer

Movement Ecology > 2015 > 3 > 1 > 1-11

Background Global positioning system (GPS) technology for monitoring home range and movements of wildlife has resulted in prohibitively large sample sizes of locations for traditional estimators of home range. We used area-under-the-curve to explore the fit of 8 estimators of home range to data collected with both GPS and concurrent very high frequency (VHF) technology on a terrestrial mammal, the...

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Mineral licks: motivational factors for visitation and accompanying disease risk at communal use sites of elk and deer

Michael J. Lavelle, Gregory E. Phillips, Justin W. Fischer, Patrick W. Burke, more

Environmental Geochemistry and Health > 2014 > 36 > 6 > 1049-1061

Free-ranging cervids acquire most of their essential minerals through forage consumption, though occasionally seek other sources to account for seasonal mineral deficiencies. Mineral sources occur as natural geological deposits (i.e., licks) or as anthropogenic mineral supplements. In both scenarios, these sources commonly serve as focal sites for visitation. We monitored 11 licks in Rocky Mountain...

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Graphically Characterizing the Movement of a Rabid Striped Skunk Epizootic Across the Landscape in Northwestern Wyoming

Craig A. Ramey, Kenneth W. Mills, Justin W. Fischer, Robert G. McLean, more

EcoHealth > 2013 > 10 > 3 > 246-256

A striped skunk (Mephitis mephitis) rabies epizootic in northwestern Wyoming was studied from the Index Case in 1988 to the last case in 1993, and possibly is the first rabies epizootic in a previously rabies-free zone monitored from beginning to end. The 843 km² study area comprised skunk habitat along 90 km of Shoshone River’s floodplain from Bighorn Lake upstream to Cody. Of 1,015 skunks tested,...

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Optimizing line intercept sampling and estimation for feral swine damage levels in ecologically sensitive wetland plant communities

Jacob F. Thomas, Richard M. Engeman, Eric A. Tillman, Justin W. Fischer, more

Environmental Science and Pollution Research > 2013 > 20 > 3 > 1503-1510

Ecological sampling can be labor intensive, and logistically impractical in certain environments. We optimize line intercept sampling and compare estimation methods for assessing feral swine damage within fragile wetland ecosystems in Florida. Sensitive wetland sites, and the swine damage within them, were mapped using GPS technology. Evenly spaced parallel transect lines were simulated across a digital...

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Using three-dimensional flight patterns at airfields to identify hotspots for avian–aircraft collisions

W. David Walter, Justin W. Fischer, John S. Humphrey, Trey S. Daughtery, more

Applied Geography > 2012 > 35 > 1-2 > 53-59

In the United States, black vulture (Coragyps atratus) and turkey vulture (Cathartes aura) pose significant birdstrike risks to aircraft. Understanding flight behaviors of vultures in and around military and civilian airfields is necessary to alleviate these risks. Using satellite telemetry data collected from 11 black vultures and 7 turkey vultures equipped with Global Positioning System backpack...

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Resource Selection by Elk in an Agro-Forested Landscape of Northwestern Nebraska

David M. Baasch, Justin W. Fischer, Scott E. Hygnstrom, Kurt C. VerCauteren, more

Environmental Management > 2010 > 46 > 5 > 725-737

In recent years, elk have begun recolonizing areas east of the Rocky Mountains that are largely agro-forested ecosystems composed of privately owned land where management of elk is an increasing concern due to crop and forage depredation and interspecific disease transmission. We used a Geographic Information System, elk use locations (n = 5013), random locations (n = 25,065), discrete-choice models,...

article

Regional assessment on influence of landscape configuration and connectivity on range size of white-tailed deer

W. David Walter, Kurt C. VerCauteren, Henry Campa, William R. Clark, more

Landscape Ecology > 2009 > 24 > 10 > 1405-1420

Variation in the size of home range of white-tailed deer (Odocoileus virginianus) has broad implications for managing populations, agricultural damage, and disease spread and transmission. Size of home range of deer also varies seasonally because plant phenology dictates the vegetation types that are used as foraging or resting sites. Knowledge of the landscape configuration and connectivity that...

article

A Fence Design for Excluding Elk Without Impeding Other Wildlife

Kurt C. VerCauteren, Nathan W. Seward, Michael J. Lavelle, Justin W. Fischer, more

Rangeland Ecology & Management > 2007 > 60 > 5 > 529-532

Concentrated herbivory by elk (Cervus elaphus) can degrade vegetative communities and alter ecosystem processes. Areas severely damaged by elk are commonly protected with woven wire fence, which can exclude other animals. Complete exclusion and prevention of large mammal herbivory might not always be necessary to restore vegetative communities. We designed and evaluated a simple fence that excluded...

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Search results for: Justin W. Fischer

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