Publications
Below is a list of available NOROCK peer reviewed and published science. If you are in search of a specific publication and cannot find it below or through a search, please contact twojtowicz@usgs.gov.
Filter Total Items: 1316
Yellowstone grizzly bear investigations: Annual report of the Interagency Grizzly Bear Study Team, 2001 Yellowstone grizzly bear investigations: Annual report of the Interagency Grizzly Bear Study Team, 2001
The contents of this Annual Report summarize results of monitoring and research from the 2001 field season. The report also contains a summary of nuisance grizzly bear (Ursus arctos horribilis) management actions. In addition to our normal monitoring, we completed an array of studies addressing the potential impacts of winter recreation on denning grizzly bears. This research was in...
A model to predict the occurrence of surviving butternut trees in the southern Appalachian region: Chapter 43 A model to predict the occurrence of surviving butternut trees in the southern Appalachian region: Chapter 43
No abstract available.
Authors
Frank T. van Manen, Joseph D. Clark, Scott E. Schlarbaum, Kristine D. Johnson, Glenn Taylor
History of pronghorn population monitoring, research, and management in Yellowstone National Park History of pronghorn population monitoring, research, and management in Yellowstone National Park
Pronghorn antelope in Yellowstone National Park (YNP) persist in a small population that historically has experienced recurrent, sometimes dramatic declines. They apparently are isolated from other pronghorns, depend partly on private lands for winter range, experience heavy predation of fawns, and concentrate during winter in a relatively small area, thereby increasing their...
Authors
Kim A. Keating
Projecting the demographic consequences of management of Yellowstone Bison: Slaughtered bison sampling winter 2001 - 2002 Projecting the demographic consequences of management of Yellowstone Bison: Slaughtered bison sampling winter 2001 - 2002
Abstract not available
Authors
Peter J. Gogan, K.M. Podruzny, Edward M. Olexa
Grizzly bear denning and potential conflict areas in the Greater Yellowstone Ecosystem Grizzly bear denning and potential conflict areas in the Greater Yellowstone Ecosystem
Increasing winter use of steep, high-elevation terrain by backcountry recreationists has elevated concern about disturbance of denning grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem (GYE). To help identify areas where such conflicts might occur, we developed a spatially explicit model to predict potential denning areas in the GYE. Using a scan area of 630 m around each...
Authors
Shannon Podruzny, Steve Cherry, Charles C. Schwartz, Lisa Landenburger
Estimating the number of females with cubs-of-the-year in the Yellowstone grizzly bear population Estimating the number of females with cubs-of-the-year in the Yellowstone grizzly bear population
No abstract available.
Authors
K.A. Keating, C.C. Schwartz, M.A. Haroldson, D. Moody
An application of queuing theory to waterfowl migration An application of queuing theory to waterfowl migration
There has always been great interest in the migration of waterfowl and other birds. We have applied queuing theory to modelling waterfowl migration, beginning with a prototype system for the Rocky Mountain Population of trumpeter swans (Cygnus buccinator) in Western North America. The queuing model can be classified as a D/BB/28 system, and we describe the input sources, service...
Authors
Richard S. Sojda, John E. Cornely, Leigh H. Fredrickson
Variable breeding phenology affects the exposure of amphibian embryos to ultraviolet radiation Variable breeding phenology affects the exposure of amphibian embryos to ultraviolet radiation
Reduced water depth in dry years has been proposed to interact with ultraviolet- B (UV-B) radiation and a pathogenic fungus to cause episodes of high mortality of amphibian embryos. Observations of breeding phenology of boreal chorus frogs (Pseudacris maculata) in Colorado from 1986 to 2001 show that dry years result in earlier breeding. The earliest and latest dates of maximum calling...
Authors
P.S. Corn, E. Muths
Chronic Wasting Disease (CWD): Just the Facts Chronic Wasting Disease (CWD): Just the Facts
Chronic Wasting Disease (CWD) has appeared widely in the media lately, but has actually been around for a while. It was first recognized in Colorado in 1967, in a captive research herd of mule deer. Its rapid expansion, to include eight states and two provinces by the year 2002, has created a crisis.
Authors
Thomas J. Roffe, Dick Jachowski
Modeling and monitoring ecosystem responses to climate change in 3 North American mountain ranges Modeling and monitoring ecosystem responses to climate change in 3 North American mountain ranges
No abstract available
Authors
Daniel B. Fagre, D. L. Peterson
Effectiveness of Brucella abortus Strain 19 single calfhood vaccination in elk (Cervus elaphus) Effectiveness of Brucella abortus Strain 19 single calfhood vaccination in elk (Cervus elaphus)
Brucellosis in Greater Yellowstone Area (GYA) bison and elk has been a source of controversy and focus of the Greater Yellowstone Interagency Brucellosis Committee (GYIBC) for years. Brucellosis has been eradicated from cattle in the 3 states of Wyoming, Montana, and Idaho and all three states currently are classified as “brucellosis free” with regard to livestock. Yet free-ranging elk...
Authors
Thomas J. Roffe, Lee C. Jones, Kenneth Coffin, Steven J. Sweeney
Responses of Florida panthers to recreational deer and hog hunting Responses of Florida panthers to recreational deer and hog hunting
Big Cypress National Preserve constitutes approximately one-third of the range of the endangered Florida panther (Puma concolor coryi). Because recreational hunting is allowed in Big Cypress National Preserve, we examined 8 response variables (activity rates, movement rates, predation success, home-range size, home-range shifts, proximity to off-road vehicle trails, use of areas with...
Authors
Michael W. Janis, Joseph D. Clark