Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 22 of 22

Full-Text Articles in Physical Sciences and Mathematics

The Devil You Know And The Devil You Don’T: Current Status And Challenges Of Bovine Tuberculosis Eradication In The United States, Daniel J. O'Brien, Tyler C. Thacker, Liliana C.M. Salvador, Anthony G. Duffiney, Suelee Robbe‑Austerman, Mark S. Camacho, Jason E. Lombard, Mitchell V. Palmer Aug 2023

The Devil You Know And The Devil You Don’T: Current Status And Challenges Of Bovine Tuberculosis Eradication In The United States, Daniel J. O'Brien, Tyler C. Thacker, Liliana C.M. Salvador, Anthony G. Duffiney, Suelee Robbe‑Austerman, Mark S. Camacho, Jason E. Lombard, Mitchell V. Palmer

USDA Wildlife Services: Staff Publications

Having entered into its second century, the eradication program for bovine tuberculosis (bTB, caused by Mycobacterium bovis) in the United States of America occupies a position both enviable and daunting. Excepting four counties in Michigan comprising only 6109 km2 (0.06% of US land area) classified as Modified Accredited, as of April 2022 the entire country was considered Accredited Free of bTB by the US Department of Agriculture for cattle and bison. On the surface, the now well-described circumstances of endemic bTB in Michigan, where white-tailed deer (Odocoileus virginianus) serve as a free-ranging wildlife maintenance host, may appear to be …


Social Network Analysis Of White-Tailed Deer Scraping Behavior: Implications For Disease Transmission, Michael E. Egan, Kim M. Pepin, Justin Fischer, Scott R. Hygnstrom, Kurt C. Vercauteren, Guillaume Bastille-Rousseau Jan 2023

Social Network Analysis Of White-Tailed Deer Scraping Behavior: Implications For Disease Transmission, Michael E. Egan, Kim M. Pepin, Justin Fischer, Scott R. Hygnstrom, Kurt C. Vercauteren, Guillaume Bastille-Rousseau

USDA Wildlife Services: Staff Publications

Host contact structure affects pathogen transmission in host populations, but many measures of host contact do not distinguish contacts that are relevant to pathogen transmission from those that are not. Scrapes are sites for chemical communication by white-tailed deer (Odocoileus virginianus) during the breeding season and potential sites of transmission of prions, the causative agent of chronic wasting disease (CWD). Scrape-related behaviors vary in their probability of transmitting prions to or from the environment, suggesting that behavior be combined with contact structure to better reflect potential heterogeneity in prion transmission at scrapes. We recorded visits and behaviors by …


Deciphering Interactions Between White-Tailed Deer And Approaching Vehicle, Morgan Pfeiffer, Raymond B. Iglay, Thomas W. Seamans, Bradley F. Blackwell, Travis L. Devault May 2020

Deciphering Interactions Between White-Tailed Deer And Approaching Vehicle, Morgan Pfeiffer, Raymond B. Iglay, Thomas W. Seamans, Bradley F. Blackwell, Travis L. Devault

USDA Wildlife Services: Staff Publications

Deer-vehicle collisions are a major transportation hazard, but factors affecting deer escape decision-making in response to vehicle approach remain poorly characterized. We made opportunistic observations of deer response to vehicle approach during daylight hours on a restricted- access facility in Ohio, USA (vehicle speeds were ≤64 km/h). We hypothesized that animal proximity to the road, group size, vehicle approach, and ambient conditions would affect perceived risk by white-tailed deer (Odocoileus virginianus) to vehicle approach, as measured by flight-initiation distance (FID). We constructed a priori models for FID, as well as road-crossing behavior. Deer responses were variable and did not demonstrate …


Regulated Commercial Harvest To Manage Overabundant White-Tailed Deer: An Idea To Consider?, Kurt C. Vercauteren, Charles W. Anderson, Timothy R. Van Deelen, David Drake, W. David Walter, Stephen Vantassel, Scott E. Hygnstrom Jan 2011

Regulated Commercial Harvest To Manage Overabundant White-Tailed Deer: An Idea To Consider?, Kurt C. Vercauteren, Charles W. Anderson, Timothy R. Van Deelen, David Drake, W. David Walter, Stephen Vantassel, Scott E. Hygnstrom

USDA Wildlife Services: Staff Publications

Declines in hunter recruitment coupled with dramatic growth in numbers of white-tailed deer (Odocoileus virginianus) have challenged our ability to manage deer populations through regulated hunting. We review the efficacy of current regulated hunting methods and explain how they are unable to reduce deer numbers sufficiently in some environments. Regulated commercial harvest would provide an additional tool to help state wildlife agencies manage overabundant populations of white-tailed deer. We outline potential means to govern regulated commercial deer harvest and explain how it is compatible with the North American Model of Wildlife Conservation. We identified several benefits, including reduced …


Regional Assessment On Influence Of Landscape Configuration And Connectivity On Range Size Of White-Tailed Deer, W. David Walter, Kurt C. Vercauteren, Henry Campa Iii, William R. Clark, Justin W. Fischer, Scott E. Hygnstrom, Nancy E. Mathews, Clayton K. Nielsen, Eric M. Schauber, Timothy R. Van Deelen, Scott R. Winterstein Jan 2009

Regional Assessment On Influence Of Landscape Configuration And Connectivity On Range Size Of White-Tailed Deer, W. David Walter, Kurt C. Vercauteren, Henry Campa Iii, William R. Clark, Justin W. Fischer, Scott E. Hygnstrom, Nancy E. Mathews, Clayton K. Nielsen, Eric M. Schauber, Timothy R. Van Deelen, Scott R. Winterstein

USDA Wildlife Services: Staff Publications

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 contributes to variation in size of home range of deer for the region is needed to fully understand differences and similarities of deer ecology throughout the Midwest. We developed a research team from four Midwestern states to investigate how size of …


Physiological Effects Of Gonadotropin-Releasing Hormone Immunocontraception On White-Tailed Deer, Paul D. Curtis, Milo E. Richmond, Lowell A. Miller, Fred W. Quimby May 2008

Physiological Effects Of Gonadotropin-Releasing Hormone Immunocontraception On White-Tailed Deer, Paul D. Curtis, Milo E. Richmond, Lowell A. Miller, Fred W. Quimby

USDA Wildlife Services: Staff Publications

Before immunocontraceptives can be considered safe to use on wildlife species, potential health risks should be assessed. Gonadotropin-releasing hormone (GnRH) immunocontraceptive has successfully reduced fertility of white-tailed deer (Odocoileus virginianus); however, associated deer physiology has rarely been examined. We conducted gross necropsy examinations, histology, and blood chemistry comparisons on euthanized deer previously vaccinated with immunogenic GnRH (n = 18 females and n = 4 males), or left as untreated controls (n = 7 females and n = 6 males). Granulomas were found at injection sites of most deer, even 3 years post-treatment. There were no significant differences in …


Gnrh Immunocontraception Of Male And Female White-Tailed Deer Fawns, Lowell A. Miller, James P. Gionfriddo, Jack C. Rhyan, Kathleen A. Fagerstone, Donald C. Wagner, Gary J. Killian May 2008

Gnrh Immunocontraception Of Male And Female White-Tailed Deer Fawns, Lowell A. Miller, James P. Gionfriddo, Jack C. Rhyan, Kathleen A. Fagerstone, Donald C. Wagner, Gary J. Killian

USDA Wildlife Services: Staff Publications

Immunocontraceptive vaccines based on gonadotropin-releasing hormone (GnRH) have been tested in adult white-tailed deer (Odocoileus virginianus), but their effects on fawns are unknown. The purpose of this study was to determine if early immunization against GnRH would induce a long-lasting immune response in fawns, and if it would delay or prevent sexual development. We gave primary and subsequent booster injections of a KLH-GnRH/Freund’s vaccine to 6 male and 6 female fawns. This vaccine contained the same active ingredients as GonaCon™ vaccine, but it contained Freund’s adjuvant instead of AdjuVac™ adjuvant. Two 450-μg injections were given 1 month apart …


Evaluation Of An Electrified Mat As A White-Tailed Deer (Odocoileus Virginianus) Barrier, Thomas W. Seamans, David A. Helon Jan 2008

Evaluation Of An Electrified Mat As A White-Tailed Deer (Odocoileus Virginianus) Barrier, Thomas W. Seamans, David A. Helon

USDA Wildlife Services: Staff Publications

White-tailed deer (Odocoileus virginianus) pose economic and safety problems for agricultural and transportation industries. We tested an electronic mat to determine if it would reduce deer crossing through fence openings. We measured deer intrusions and corn consumption at five sites with charged mats and five sites with non-charged mats. Weekly intrusions at treated sites decreased an average of 95% from pre-treatment. Weekly intrusions at control sites were reduced 60% during weeks 1 and 2 and increased to 10% reduction by week 6. Weekly corn consumption at treated sites decreased from pretreatment through all treatment weeks. Weekly corn consumption …


The Single-Shot Gnrh Immunocontraceptive Vaccine (GonaconTm ) In White-Tailed Deer: Comparison Of Several Gnrh Preparations, Lowell A. Miller, James P. Gionfriddo, Kathleen A. Fagerstone, Jack C. Rhyan, Gary J. Killian Jan 2008

The Single-Shot Gnrh Immunocontraceptive Vaccine (GonaconTm ) In White-Tailed Deer: Comparison Of Several Gnrh Preparations, Lowell A. Miller, James P. Gionfriddo, Kathleen A. Fagerstone, Jack C. Rhyan, Gary J. Killian

USDA Wildlife Services: Staff Publications

Problem: An effective, single-injection, multi-year, GnRH contraceptive agent is needed to control reproduction in overabundant white-tailed deer populations.

Method of study: Two GnRH conjugates, GonaConTM (GnRH–KLH) and GonaCon-BTM (GnRH–blue protein), were prepared in emulsion form as one-injection and two-injection immunocontraceptive vaccine formulations. In addition, the GnRH–KLH protein conjugate was lyophilized and suspended in AdjuVacTM adjuvant to produce a fifth vaccine formulation. Each formulation was administered to a group of five captive adult female white-tailed deer. Reproductive performance of treated female deer was monitored for 5 years to determine the comparative efficacy of the various treatments.

Results: The …


Fence-Line Contact Between Wild And Farmed White-Tailed Deer In Michigan: Potential For Disease Transmission, Kurt C. Vercauteren, Michael J. Lavelle, Nathan W. Seward, Justin W. Fischer, Gregory E. Phillips Jun 2007

Fence-Line Contact Between Wild And Farmed White-Tailed Deer In Michigan: Potential For Disease Transmission, Kurt C. Vercauteren, Michael J. Lavelle, Nathan W. Seward, Justin W. Fischer, Gregory E. Phillips

USDA Wildlife Services: Staff Publications

Interactions between wild and farmed white-tailed deer (Odocoileus virginianus) along perimeter fences may play a role in the transmission of diseases like bovine tuberculosis and chronic wasting disease. However, no study has evaluated direct contact between wild and farmed deer through fences. We used animal-activated cameras to estimate rates of interaction between wild and farmed deer at 6 high-fenced commercial white-tailed deer farms in Michigan, USA, during October 2003 to January 2005. We recorded only 2 direct, naso-oral contacts between wild and farmed deer during >77,000 hours of camera monitoring. We documented little direct contact between wild and …


A Frightening Device For Deterring Deer Use Of Cattle Feeders, Nathan W. Seward, Gregory E. Phillips, Jared F. Duquette, Kurt C. Vercauteren Feb 2007

A Frightening Device For Deterring Deer Use Of Cattle Feeders, Nathan W. Seward, Gregory E. Phillips, Jared F. Duquette, Kurt C. Vercauteren

USDA Wildlife Services: Staff Publications

The presence of bovine tuberculosis (TB) in cattle can negatively impact a state’s economy and cattle industry. In Michigan, USA, wild white-tailed deer (Odocoileus virginianus) are a reservoir for reinfecting cattle herds. Although direct TB transmission between deer and cattle is rare, infected deer may contaminate cattle feed. To mitigate this risk, we designed and evaluated a deer-resistant cattle feeder (DRCF) device for deterring deer from feeders. The device delivered negative stimuli to condition deer to avoid cattle feeders. We tested the device by conducting a comparative change experiment at a high-density captive white-tailed deer operation in northeastern …


Research Strategies To Reduce Bovine Tuberculosis Transmission From Wildlife To Cattle, Are R. Brentensen, Mike R. Dunbar, Robert G. Mclean Jan 2007

Research Strategies To Reduce Bovine Tuberculosis Transmission From Wildlife To Cattle, Are R. Brentensen, Mike R. Dunbar, Robert G. Mclean

USDA Wildlife Services: Staff Publications

Bovine tuberculosis (bTB) is a zoonotic disease caused by Mycobaterium bovis, and is transmissible to humans, wildlife and domestic livestock. In the northern Lower Peninsula of Michigan, white-tailed deer (Odocoileus virginianus) serve as a reservoir for the disease and pose a significant threat to domestic cattle and captive cervids. Scientists at USDA, APHIS, Wildlife Services, National Wildlife Research Center have designed a variety of laboratory and field studies aimed at reducing or eliminating bTB infection in cattle by interrupting the transmission of the disease from wildlife reservoirs. These strategies include reducing bTB in deer by delivery of …


Green And Blue Lasers Are Ineffectivefor Dispersing Deer At Night, Kurt C. Vercauteren, Jason M. Gilsdorf, Scott E. Hygnstrom, Paul B. Fioranelli, John A. Wilson, Scott Barras Sep 2006

Green And Blue Lasers Are Ineffectivefor Dispersing Deer At Night, Kurt C. Vercauteren, Jason M. Gilsdorf, Scott E. Hygnstrom, Paul B. Fioranelli, John A. Wilson, Scott Barras

USDA Wildlife Services: Staff Publications

Over-abundant populations of white-tailed deer (Odocoileus virginianus) create agriculturaland human health and safety issues. The increased economic damage associated with locally overabundant deer populations accentuates the need for efficient techniques to mitigate the losses. Although red lasers can be an efficient tool for reducing damage caused by birds, they are not effective for deer because deer cannot detect wavelengths in the red portion of the spectrum. No research has been conducted to determine if lasers of lower wavelengths could function as frightening devices for deer. We evaluated agreen laser (534nm, 120mW)and 2 models of blue lasers (473nm, 5 mW and …


Fences And Deer-Damage Management: A Review Of Designs And Efficacy, Kurt C. Vercauteren, Michael J. Lavelle, Scott Hygnstrom Aug 2006

Fences And Deer-Damage Management: A Review Of Designs And Efficacy, Kurt C. Vercauteren, Michael J. Lavelle, Scott Hygnstrom

USDA Wildlife Services: Staff Publications

White-tailed deer (Odocoileus virginianus) may cause more damage than any other species of wildlife. These damages include crop loss, automobile and aviation collisions, disease transmission, environmental degradation, and destruction of ornamental plantings. One practical method of controlling deer damage is the use of exclusionary fences. The relatively high cost of labor and materials required to build effective fences has limited most applications to the protection of orchards, vegetable farms, other high-value resources, and mitigation of human health and safety risks. Improvements in fence technology resulting in less expensive, yet effective fences have expanded the use of fences to manage damage …


Cervid Disease Research At The National Wildlife Research Center, Kurt C. Vercauteren, Mike Lavelle, Dale L. Nolte, Scott E. Hygnstrom, Jason Gilsdorf Feb 2004

Cervid Disease Research At The National Wildlife Research Center, Kurt C. Vercauteren, Mike Lavelle, Dale L. Nolte, Scott E. Hygnstrom, Jason Gilsdorf

USDA Wildlife Services: Staff Publications

The realized and perceived threats of cervid diseases have immense implications for federal and state wildlife management agencies, captive cervid ranchers, hunters, and businesses and economies that rely on recreation associated with deer and elk. Therefore, the spread of diseases, primarily chronic wasting disease and bovine tuberculosis, in wild and captive cervids is of great concern. Research is paramount to closing information gaps associated with all aspects of cervid diseases. The Wildlife Disease Research Program of the USDA APHIS WS National Wildlife Research Center is engaged in considerable research on cervid diseases. Efforts focus on disease epidemiology, cervid ecology, and …


Feasibility Of Localized Management To Control White-Tailed Deer In Forest Regeneration Areas, Tyler A. Campbell, Benjamin R. Laseter, W. Mark Ford, Karl V. Miller Jan 2004

Feasibility Of Localized Management To Control White-Tailed Deer In Forest Regeneration Areas, Tyler A. Campbell, Benjamin R. Laseter, W. Mark Ford, Karl V. Miller

USDA Wildlife Services: Staff Publications

The deleterious effects of white-tailed deer (Odocoileus virginianus) on forest regeneration are well documented in many forested systems, but potential solutions to these problems on remote landholdings are limited in number and scope. Localized management proposes that a persistent area (<2 km2) of low density can be created by removing all individuals within matriarchal social groups of white-tailed deer. Our objective was to assess the feasibility of using localized management as a tool within forest regeneration areas. We present a comparison of seasonal home-range and core-area size and site fidelity of 148 radiomonitored female white-tailed deer in a forested landscape of the central Appalachians of West Virginia. We also characterized seasonal movements and dispersal. Adult female winter home-range size exceeded those of summer and autumn. Female deer displayed high fidelity, with home-range and core-area overlap being less in autumn than in summer or winter. Dispersal occurred in 1 of 28 (3.6%) female fawns and no deer >1 year old dispersed. Female white-tailed deer on our study site meet the a priori assumptions of localized management. We assert that experimental manipulations based on localized management concepts are prudent.


Evaluation Of A Deer-Activated Bioacoustic Frightening Device For Reducing Deer Damage In Cornfields, Jason M. Gildorf, Scott E. Hygnstrom, Kurt C. Vercauteren, Greg M. Clements, Erin E. Blankenship, Richard M. Engeman Jan 2004

Evaluation Of A Deer-Activated Bioacoustic Frightening Device For Reducing Deer Damage In Cornfields, Jason M. Gildorf, Scott E. Hygnstrom, Kurt C. Vercauteren, Greg M. Clements, Erin E. Blankenship, Richard M. Engeman

USDA Wildlife Services: Staff Publications

Deer (Odocoileus spp.) can cause substantial damage to agricultural crops, resulting in economic losses for producers. We developed a deer-activated bio-acoustic frightening device to reduce white-tailed deer (O. virginianus) damage in agricultural fields. The device consisted of an infrared detection system that activated an audio component which broadcast recorded distress and alarm calls of deer. We tested the device against unprotected controls in cornfields during the silking–tasseling stage of growth in July 2001. The device was not effective in reducing damage: track-count indices (F1,4=0.02, P=0.892), corn yield (F1,9=1.27, P=0.289), and estimated damage levels (F1,10=0.87, P=0.374) did not differ between experimental …


Propane Exploders And Electronic Guards Were Ineffective At Reducing Deer Damage In Cornfields, Jason M. Gilsdorf, Scott E. Hygnstrom, Kurt C. Vercauteren, Erin E. Blankenship, Richard M. Engeman Jan 2004

Propane Exploders And Electronic Guards Were Ineffective At Reducing Deer Damage In Cornfields, Jason M. Gilsdorf, Scott E. Hygnstrom, Kurt C. Vercauteren, Erin E. Blankenship, Richard M. Engeman

USDA Wildlife Services: Staff Publications

White-tailed deer (Odocoileus virginianus) cause millions of dollars of damage to agricultural crops annually. We tested the effectiveness of propane exploders and Electronic Guards (Pocatello Supply Depot, Pocatello, Id.) for reducing deer damage in cornfields during the silking–tasseling stage of growth. Track-count indices (F2,7=0.70, P=0.532), corn yields (F2,6=0.14, P=0.873), and estimated damage levels (F2,12=1.45 P=0.272) did not differ between experimental and control fields. The size (F2,11=0.08, P=0.924), location (F2,9=0.30, P=0.750), and percent overlap (F2,9=0.46, P=0.644) of use-areas of radiomarked female deer in the vicinity of experimental fields did not differ among before, during, and after 18-day treatment periods. In a …


A Review Of Color Vision In White-Tailed Deer, Kurt C. Vercauteren, Michael J. Pipas Dec 2003

A Review Of Color Vision In White-Tailed Deer, Kurt C. Vercauteren, Michael J. Pipas

USDA Wildlife Services: Staff Publications

A better understanding of the color vision abilities of white-tailed deer (Odocoileus virginianus) helps to determine how these animals interpret their environment. We review and summarize the literature related to the color vision abilities of white-tailed deer. Physiological measurements using advanced techniques such as molecular genetics, electroretinography, and electron microscopy have demonstrated conclusively that whitetailed deer possess the anatomical requisites for color vision. Operant conditioning techniques employed in pen studies using trained cervids confirm that deer see color. The eyes of white-tailed deer are characterized by 3 classes of photopigments: a short-wavelengthsensitive cone mechanism, a middle-wavelength-sensitive cone mechanism, …


Red Lasers Are Ineffective For Dispersing Deer At Night, Kurt C. Vercauteren, Scott E. Hygnstrom, Michael J. Pipas, Paul B. Fioranelli, Scott J. Werner, Bradley F. Blackwell Jul 2003

Red Lasers Are Ineffective For Dispersing Deer At Night, Kurt C. Vercauteren, Scott E. Hygnstrom, Michael J. Pipas, Paul B. Fioranelli, Scott J. Werner, Bradley F. Blackwell

USDA Wildlife Services: Staff Publications

Populations of white-tailed deer (Odocoileus virginianus) and the number of deer-human conflicts have increased in recent years, emphasizing the need for efficient and inexpensive methods to reduce site-specific deer damage. Recent research using laser technology to disperse a variety of bird species has yielded promising results, prompting wildlife professionals and the public to question whether lasers could play a role in reducing damage and conflict with mammals, primarily deer. We evaluated 2 red lasers (63-650 nm) to determine their effectiveness as devices to frighten deer. No differences occurred in flight response between lasers or between the control and …


Porcine Zona Pellucida Immunocontraception: Long-Term Health Effects On White-Tailed Deer, Lowell A. Miller, Ken Crane, Stan Gaddis, Gary J. Killian Oct 2001

Porcine Zona Pellucida Immunocontraception: Long-Term Health Effects On White-Tailed Deer, Lowell A. Miller, Ken Crane, Stan Gaddis, Gary J. Killian

USDA Wildlife Services: Staff Publications

As part of a 9-year study on the contraceptive effects of Porcine Zona Pellucida (PZP) on white-tailed deer (Odocoileus virginianus), we analyzed serum chemistry panels during the first 4 years. This included the first 2 years when does were being actively immunized, and 2 years post-immunization. The chemistry panel was designed to detect pathologies that might result from the immunization of the deer. Blood chemistry results did not suggest any pathological changes resulting from the immunization. Seasonal differences in serum cholesterol were similar in both the control and PZP-treated groups. Seasonal changes in the mean body weights of …


Porcine Zona Pellucida Immunocontraception: Long-Term Health Effects On White-Tailed Deer, Lowell A. Miller, Ken Crane, Stan Gaddis, Gary J. Killian Mar 2001

Porcine Zona Pellucida Immunocontraception: Long-Term Health Effects On White-Tailed Deer, Lowell A. Miller, Ken Crane, Stan Gaddis, Gary J. Killian

USDA Wildlife Services: Staff Publications

As part of a 9-year study on the contraceptive effects of Porcine Zona Pellucida (PZP) on white-tailed deer (Odocoileus virginianus), we analyzed serum chemistry panels during the first 4 years. This included the first 2 years when does were being actively immunized, and 2 years post-immunization. The chemistry panel was designed to detect pathologies that might result from the immunization of the deer. Blood chemistry results did not suggest any pathological changes resulting from the immunization. Seasonal differences in serum cholesterol were similar in both the control and PZP-treated groups. Seasonal changes in the mean body weights of …