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: 1211
Spread of hybridization between native westslope cutthroat trout, Oncorhynchus clarki lewisi, and nonnative rainbow trout, Oncorhynchus mykiss
We examined spatial and temporal patterns of hybridization between native westslope cutthroat trout, Oncorhynchus clarki lewisi, and nonnative rainbow trout, O. mykiss, in streams of the Flathead River system in Montana, U.S.A. We detected hybridization in 24 of 42 sites sampled from 1998 to 2001. We found new Oncorhynchus mykiss introgression in seven of 11 sample populations that were determined
Authors
Nathaniel P. Hitt, Christopher A. Frissell, Clint C. Muhlfeld, Fred W. Allendorf
Large carnivores, moose, and humans: A changing paradigm of predator management in the 21st century
We compare and contrast the evolution of human attitudes toward large carnivores between Europe and North America. In general, persecution of large carnivores began much earlier in Europe than North America. Likewise, conservation programs directed at restoration and recovery appeared in European history well before they did in North America. Together, the pattern suggests there has been an evolut
Authors
Charles C. Schwartz, J. E. Swenson, Sterling D. Miller
Modeling a complex conceptual theory of population change in the Shiras moose: History and recasting as a structural equation model
No abstract available.
Authors
Bruce H. Pugesek
Ecological implications of bovine tuberculosis in African Buffalo herds
Following the recent invasion of bovine tuberculosis (BTB) into the Kruger National Park, South Africa, we conducted a study on the maintenance host, African buffalo, to investigate associations between BTB prevalence and calf:cow ratio, age structure, body condition, and endoparasite load. Statistical analyses compared herds of zero, medium (1–40%), and high (>40%) BTB prevalence. To control for
Authors
Alex Caron, Paul C. Cross, Johan T. du Toit
Amphibian breeding and climate change: The importance of snow in the mountains
The breeding phenologies of ectotherms are inextricably linked to weather, and amphibians in some temperate locations may have been breeding earlier in recent years in response to warmer spring temperatures (Beebee 1995: Forchhammer et al. 1998; Gibbs & Breisch 2001). Directional change in the timing of breeding resulting from climate change may have consequences for the fitness of individuals and
Authors
P. Stephen Corn
Lessons from the fires of 2000: Post-fire heterogeneity in ponderosa pine forests
We evaluate burn-severity patterns for six burns that occurred in the southern Rocky Mountains and the Colorado Plateau in 2000. We compare the results of two data sources: Burned Area Rehabilitations Teams (BAER) and a spatial burnseverity model derived from satellite imagery (the Normalized Burn Ratio; NBR). BAER maps tended to overestimate area of severe burns and underestimate area of moderate
Authors
Natasha B. Kotliar, Sandra L. Haire, Carl H. Key
Guidelines for the implementation and publication of structural equation models
No abstract available
Authors
Bruce H. Pugesek, Adrian Tomer
Climate variability and change in high elevation regions: Past, present & future
This special issue of Climatic Change contains a series of research and review articles, arising from papers that were presented and discussed at a workshop held in Davos, Switzerland on 25–28 June 2001. The workshop was titled ‘Climate Change at High Elevation Sites: Emerging Impacts’, and was convened to reprise an earlier conference on the same subject that was held in Wengen, Switzerland in 19
Authors
Henry F. Diaz, Martin Grosjean, Lisa J. Graumlich
Quaternary geology and ecology of the Greater Yellowstone area
This field guide focuses on the glacial geology, ecology, paleoecology, caldera unrest, and archeology in Yellowstone and Grand Teton national parks and vicinity (Fig. 1). Some previous field guides of Yellowstone are Locke et al. (1995) for the Yellowstone valley, Fournier et al. (1994) for hydrothermal and volcanic geology of Yellowstone, and Pierce and Good (1992) for the Quaternary of Jackson
Authors
Kenneth L. Pierce, Don G. Despain, Cathy Whitlock, Kenneth P. Cannon, Grant A. Meyer, Lisa Morgan, Joseph M. Licciardi
Winter diel habitat use and movement by subadult bull trout in the upper Flathead River, Montana
We evaluated the diel habitat use and movement of subadult bull trout Salvelinus confluentus by use of radiotelemetry during winter in the upper Flathead River, Montana. Of the 13 monitored bull trout, 12 (92%) made at least one diel movement to other habitat locations during their respective day–night tracking surveys and moved an average of 73% of the time. The median distance moved from day to
Authors
Clint C. Muhlfeld, Steve Glutting, Rick Hunt, Durae Daniels, Brian Marotz
Modeling means in latent variable models of natural selection
No abstract available.
Authors
Bruce H. Pugesek
Concepts of structural equation modeling in biological research
No abstract available.
Authors
Bruce H. Pugesek