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University of Nebraska - Lincoln

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Full-Text Articles in Physical Sciences and Mathematics

Preliminary Evidence Of Anticoagulant Rodenticide Exposure In American Kestrels (Falco Sparverius) In The Western United States, Evan R. Buechley, Dave Oleyar, Jesse L. Watson, Jennifer Bridgeman, Steven Volker, David A. Goldade, Catherine E. Swift, Barnett A. Rattner Jun 2023

Preliminary Evidence Of Anticoagulant Rodenticide Exposure In American Kestrels (Falco Sparverius) In The Western United States, Evan R. Buechley, Dave Oleyar, Jesse L. Watson, Jennifer Bridgeman, Steven Volker, David A. Goldade, Catherine E. Swift, Barnett A. Rattner

United States Geological Survey: Staff Publications

Although there is extensive evidence of declines in the American Kestrel (Falco sparverius) population across North America, the cause of such declines remains a mystery. One hypothesized driver of decline is anticoagulant rodenticide (AR) exposure, which could potentially cause mortality or reduced fitness. We investigated AR exposure in wild American Kestrels in Utah, USA. We collected and tested for AR residues in liver samples (n = 8) from kestrels opportunistically encountered dead and in blood samples (n = 71) from live wild kestrels, both nestlings and adults. We found high detection rates in both tissues. Adult …

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Conflict, Coexistence, Or Both? Cougar Habitat Selection, Prey Composition, And Mortality In A Multiple-Use Landscape, David C. Stoner, Mark A. Ditmer, Dustin L. Mitchell, Julie K. Young, Michael L. Wolfe Jan 2021

Conflict, Coexistence, Or Both? Cougar Habitat Selection, Prey Composition, And Mortality In A Multiple-Use Landscape, David C. Stoner, Mark A. Ditmer, Dustin L. Mitchell, Julie K. Young, Michael L. Wolfe

USDA Wildlife Services: Staff Publications

Western North America is experiencing remarkable human population growth and land-use change. Irrigation and associated cultivation have led to colonization of urban-wildland interface (UWI) environments by mule deer (Odocoileus hemionus), and consequently, cougars (Puma concolor). In the wake of these changes, human-wildlife conflicts have increased in tandem with questions about long-term species conservation. To address these concerns, we fit 79 cougars with radio-telemetry collars in the Oquirrh Mountains near Salt Lake City, Utah (2002–2010). Our goal was to evaluate variation in cougar habitat selection, diet, and cause-specific mortality in a landscape dominated by urban, military, and industrial activities. We used …

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First Report On Dinosaur Tracks From The Burro Can Yon Formation, San Juan County, Utah, Usa – Evidence Of A Diverse, Hitherto Un Known Lower Cretaceous Dinosaur Fauna, Jesper Milan, Luis M. Chiappe, David B. Loope, James I. Kirkland, Martin G. Lockley Jan 2015

First Report On Dinosaur Tracks From The Burro Can Yon Formation, San Juan County, Utah, Usa – Evidence Of A Diverse, Hitherto Un Known Lower Cretaceous Dinosaur Fauna, Jesper Milan, Luis M. Chiappe, David B. Loope, James I. Kirkland, Martin G. Lockley

Department of Earth and Atmospheric Sciences: Faculty Publications

The newly discovered White Mesa tracksite in the Burro Canyon Formation represents a snap shot of a diverse, Lower Cretaceous dinosaur fauna from south-eastern Utah. The tracks were found at a construction site where the sand stone had been bull dozed and broken up. All tracks were found as deep, well-preserved natural casts on the under side of the sand stone slabs. Individual theropod tracks are 19–57 cm in length; one peculiar track shows evidence of a possible pathological swelling in the middle of digit III and an apparently didactyl track is tentatively as signed to a dromaeosaurid. Individual sauropod …

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Assessment Of Costs Associated With Deer–Vehicle Collisions: Human Death And Injury, Vehicle Damage, And Deer Loss, John A. Bissonette, Christine A. Kassar, Lawrence J. Cook Jan 2008

Assessment Of Costs Associated With Deer–Vehicle Collisions: Human Death And Injury, Vehicle Damage, And Deer Loss, John A. Bissonette, Christine A. Kassar, Lawrence J. Cook

Human–Wildlife Interactions

Collisions between large vertebrates and vehicles along roadways are an increasing concern, not only because of ecological consequences, but also because of associated economic and social costs. We used a large-scale, long-term data set comprising several databases from Utah to summarize and analyze these costs. The overall cost for 13,020 collisions from 1996 to 2001 in Utah was approximately $45,175,454, resulting in an estimated average per year cost of about $7,529,242 and a mean collision cost of $3,470. These figures include human fatality costs of $24 million (53% of total costs); vehicle damage costs of $18 million (39%); loss of …

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Take Action! The Past, Present, And Future Of Sage-Grouse Conservation In Utah, Sarah G. Lupis, Terry A. Messmer, Todd A. Black, S. Nicole Frey, Dean Mitchell, Joan Degiorgio Oct 2006

Take Action! The Past, Present, And Future Of Sage-Grouse Conservation In Utah, Sarah G. Lupis, Terry A. Messmer, Todd A. Black, S. Nicole Frey, Dean Mitchell, Joan Degiorgio

11th Triennial National Wildlife and Fisheries Extension Specialists Conference (2006)

Utah has a 10-year history of local conservation planning for sage-grouse populations. The San Juan County Gunnison Sage-Grouse Local Working Group (SWOG) was formed in 1996 and completed a local conservation plan in 2000; the Parker Mountain Adaptive Resource Management Local Working Group (PARM) was established in 1998 and has been a model for sagegrouse conservation planning throughout the state. In July 2006, most of Utah’s 12 adaptive resource management local working groups completed local conservation plans for sage-grouse that address the unique issues affecting their respective areas. Each local working group is made up of diverse stakeholders including landowners, …

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The “We Know, We Believe, And We Feel” Approach To Implementing Projects Under The Farm Bill To Benefit Sage-Grouse, Terry A. Messmer Oct 2006

The “We Know, We Believe, And We Feel” Approach To Implementing Projects Under The Farm Bill To Benefit Sage-Grouse, Terry A. Messmer

11th Triennial National Wildlife and Fisheries Extension Specialists Conference (2006)

Sage-grouse occupy less than 8% of their historic range. To address these declines, the western states and provinces have implemented sage-grouse management plans. These plans identified the need for local working groups (LWGs) to develop and implement conservation plans to address high priority issues. To facilitate LWGs in Utah, the Division of Wildlife Resources entered into a cooperative agreement with Utah State University Extension in 2001 to develop a Utah Community-Based Conservation (CBCP) program. Because sage-grouse occupy diverse landscapes each exhibiting different land ownership patterns, each of the sage-grouse management areas are somewhat unique. Thus, we believe the success of …

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Accuracy Of Aerial Telemetry Locations In Mountainous Terrain, Glen F. Gantz, L. Charles Stoddart, Frederick F. Knowlton Feb 2006

Accuracy Of Aerial Telemetry Locations In Mountainous Terrain, Glen F. Gantz, L. Charles Stoddart, Frederick F. Knowlton

USDA Wildlife Services: Staff Publications

Aerial telemetry is commonly used to locate wildlife in remote areas (Gilmer et al. 1981, White and Garrott 1990, Samuel and Fuller 1996). If locations are used to determine home range, habitat use, or similar parameters, error associated with locations must be estimated (Cederlund et al. 1979, Laundre et al. 1987, White and Garrott 1990, Carrel et al. 1997).

Typically, aerial locations are subject to 2 sources of error. If the transmitter-equipped animals are not sighted from the aircraft, their ground location must be estimated. Then, the estimated ground location must be identified on a map and recorded. The combined …

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Wild Ungulate Depredation On Winter Wheat: Effects On Grain Yield, Dennis D. Austin, Philip J. Urness Apr 1995

Wild Ungulate Depredation On Winter Wheat: Effects On Grain Yield, Dennis D. Austin, Philip J. Urness

Great Plains Wildlife Damage Control Workshop Proceedings

The effects of big game grazing of winter wheat on grain yield were studied during 12 trials in northern Utah between 1990-92. Differences in yield were measured for each trial using 20 sets of 1-m2 plots protected and variously grazed by mule deer (Odocoileus hemionus), pronghorn (Antilocapra americana) and Rocky Mountain elk (Cervus elaphus) in a randomized block design along the edges of sampled fields. Plots were hand cut at the beginning of commercial harvest. Grazing impacts were indexed by nighttime counts of game animals, pellet-group counts, and ocular estimates of percent track …

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