Publications
Filter Total Items: 2073
Elk in Olympic National Park: Will they persist over time? Elk in Olympic National Park: Will they persist over time?
No abstract available.
Authors
D.B. Houston, Edward G. Schreiner, Bruce B. Moorhead, K.A. Krueger
Effects of livestock grazing on raptors with emphasis on the southwestern U.S. Effects of livestock grazing on raptors with emphasis on the southwestern U.S.
No abstract available
Authors
Michael N. Kochert, B.A. Millsap, K. Steenhof
Energetic constraints on winter habitat selection by cervids in Glacier National Park Energetic constraints on winter habitat selection by cervids in Glacier National Park
No abstract available.
Authors
K.J. Jenkins, R.G. Wright
Roosevelt elk density in old-growth forests of Olympic National Park Roosevelt elk density in old-growth forests of Olympic National Park
We explored the feasibility of censusing Roosevelt elk from a helicopter in the dense old growth forests of Olympic National Park. WA. Mean observed densities ranged from 8.0-11.6 elk/km2, with coefficients of variation averaging 19.9 percent. A provisional sightability factor of 74 percent suggested that actual mean densities ranged from 10.8-16.0 elk/km2. We conclude that estimates of...
Authors
D.B. Houston, Bruce B. Moorhead, R.W. Olson
Organochlorine-induced mortality and residues in long-billed curlews from Oregon Organochlorine-induced mortality and residues in long-billed curlews from Oregon
No abstract available.
Authors
L. J. Blus, Charles J. Henny, A. J. Krynitsky
Elk and deer diets in old-growth forests in western Washington Elk and deer diets in old-growth forests in western Washington
Dietary quality and overlap of sympatric Roosevelt elk (Cervus elaphus roosevelti) and Columbian black-tailed deer (Odocoileus hemionus columbianus) were investigated in old-growth forests of the Hoh Valley, Olympic National Park, Washington. Diets of both cervids were comprised mainly of common old-growth flora, particularly in winter. High dietary overlap suggested competitive...
Authors
David M. Leslie, Edward E. Starkey, Martin Vavra
Mapping of hydrothermal alteration in the Cuprite mining district, Nevada, using aircraft scanner images for the spectral region 0.46 to 2.36µm Mapping of hydrothermal alteration in the Cuprite mining district, Nevada, using aircraft scanner images for the spectral region 0.46 to 2.36µm
Color composites of Landsat Multispectral Scanner ratio images that display variations in the intensity of ferric-iron absorption bands are highly effective for mapping limonitic altered rocks but are ineffective for mapping nonlimonitic altered rocks. Analysis of 0.45- to 2.5-µm field and laboratory spectra shows that iron-deficient opalized rocks in the Cuprite mining district, Nevada...
Authors
M. J. Adams, Roger P. Ashley, L. C. Rowan, Alexander F.H. Goetz, A.B. Kahle
The 1973 distribution and abundance of breeding ospreys in the Chesapeake Bay The 1973 distribution and abundance of breeding ospreys in the Chesapeake Bay
An aerial survey in association with several intensive ground surveys yielded the first estimate of the size of the osprey (Pandion haliaetus carolinensis) nesting population in Chesapeake Bay. The 1973 population was estimated at 1,450 ± 30 pairs, of which 713 were on the western shore and 737 on the eastern shore. A small percentage of nonbreeders (possibly 2-5 percent) may be included...
Authors
Charles J. Henny, Morton M. Smith, Vernon D. Stotts
Aerial surveys of waterfowl production in North America, 1955-71 Aerial surveys of waterfowl production in North America, 1955-71
No abstract available.
Authors
Charles J. Henny, David R. Anderson, Richard S. Pospahala