Northern Rocky Mountain Science Center

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: 996
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Year Published: 2002

Estimating the number of females with cubs-of-the-year in the Yellowstone grizzly bear population

Keating, K.A.; Schwartz, C.C.; Haroldson, M.A.; Moody, D.
Estimating the number of females with cubs-of-the-year in the Yellowstone grizzly bear population; 2002; Article; Journal; Ursus; Keating, K. A.; Schwartz, C. C.; Haroldson, M. A.; Moody, D.

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Year Published: 2002

Estimating total human-caused mortality from reported mortality using data from radio-instrumented grizzly bears

 Tracking mortality of the Yellowstone grizzly bear (Ursus arctos horribilis) is an essential issue of the recovery process. Problem bears removed by agencies are well documented. Deaths of radiocollared bears are known or, in many cases, can be reliably inferred. Additionally, the public reports an unknown proportion of deaths of...

Cherry, S.; Haroldson, M.A.; Robison-Cox, J.; Schwartz, C.C.

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Year Published: 2002

Evaluation of 2-soft-release techniques to reintroduce black bears

Black bear (Ursus americanus) were extirpated from most of their range by the early 1900s by habitat destruction and unregulated hunting. Since then, bear habitat has recovered in many areas, but isolation may prevent natural recolonization. Black bear translocations often have limited success because of high mortality rates and low site fidelity...

Eastridge, Rick; Clark, Joseph D.

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Year Published: 2002

Genetic structure of Columbia River redband trout populations in the Kootenai River drainage, Montana, revealed by microsatellite and allozyme loci

We describe the genetic divergence among 10 populations of redband trout Oncorhynchus mykiss gairdneri from the upper Columbia River drainage. Resident redband trout from two watersheds in the Kootenai River drainage and hatchery stocks of migratory Kamloops redband trout from Kootenay Lake, British Columbia, were analyzed using allele frequency...

Knudsen, Kathy L.; Muhlfeld, Clint C.; Sage, George K.; Leary, Robb F.
Genetic structure of Columbia River redband trout populations in the Kootenai River drainage, Montana, revealed by microsatellite and allozyme loci; 2002; Article; Journal; Transactions of the American Fisheries Society; Knudsen, K. L.; Muhlfeld, C. C.; Sage, G. K.; Leary, R. F.

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Year Published: 2002

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-...

Janis, Michael W.; Clark, Joseph D.

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Year Published: 2002

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...

Corn, P. S.; Muths, E.
Variable breeding phenology affects the exposure of amphibian embryos to ultraviolet radiation; 2002; Article; Journal; Ecology; Corn, P. S.; Muths E.

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Year Published: 2002

Distribution of grizzly bears in the Greater Yellowstone Ecosystem, 1990-2000

The Yellowstone grizzly bear (Ursus arctos horribilis) has been expanding its range during the past 2 decades and now occupies historic habitats that had been vacant. A current understanding of the distribution of grizzly bears within the ecosystem is useful in the recovery process and to help guide the state and federal land management agencies...

Schwartz, Charles C.; Haroldson, Mark A.; Gunther, Kerry A.; Moody, D.

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Year Published: 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...

Schwartz, Charles C.; Haroldson, Mark A.

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Year Published: 2001

Ecological studies of bison in the Greater Yellowstone Area: Development and implementation

Bison (Bison bison) of the Greater Yellowstone Area (GYA) are perhaps best known to the scientific community from the classic study of Meagher (1973) that reviewed their ecological status and management from the time of establishment of Yellowstone National Park in 1872 through the last National Park Service (NPS) removals of bison within the park...

Gogan, Peter J.; Mack, John A.; Brewster, Wayne G.; Olexa, Edward M.; Clark, Wendy E.

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Year Published: 2001

The condition of browse plants at the Theodore Roosevelt Memorial Ranch (TRMR)

The Theodore Roosevelt Memorial Ranch (TRM), owned and operated by the Boone and Crockett Club, spans 6,000 acres along the Rocky Mountain East Front. The ranch is located west of Dupuyer, Montana, on the forks of Dupuyer and Scoffin Creeks. Each fall, mule deer migrate from the Bob Marshall Wilderness and adjacent Lewis and Clark and Flathead...

Keigley, R.B.; Olson, Gary R.

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Year Published: 2001

Status and distribution of whitebark and limber pine in Glacier, Yellowstone, and Grand Teton National Parks

To sample and map whitebark pine communities in the greater Glacier-Waterton ecosystem. The information will be combined with data collected at other locales to assess the status of whitebark pine throughout the central and northern Rocky Mountains.

Kendall, Katherine C.

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Year Published: 2001

Survival and immobilizing moose with carfentanil and xylazine

The use of carfentanil with other drugs to immobilize moose (Alces alces) has yielded mixed results. Previous work on chemically immobilizing moose with these drugs reported mortality of 6–19%. Even the most recent study of free-ranging moose using the same drug combination as we used in this report (carfentanil and xylazine) had 6%...

Roffe, Thomas J.; Coffin, K.; Berger, Joel