Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

184800 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 4458, results 111426 - 111450

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Habitat relationships and nest site characteristics of cavity-nesting birds in cottonwood floodplains
James A. Sedgwick, Fritz L. Knopf
1990, Journal of Wildlife Management (54) 112-124
We examined habitat relationships and nest site characteristics for 6 species of cavity-nesting birds--American kestrel (Falco sparverius), northern flicker (Colaptes auratus), red-headed woodpecker (Melanerpes erythrocephalus), black-capped chickadee (Parus atricapillus), house wren (Troglodytes aedon), and European starling (Sturnus vulgaris)--in a mature plains cottonwood (Populus sargentii) bottomland along the South Platte River...
Kidney lesions associated with mortality in chickens inoculated with waterfowl influenza viruses
R.D. Slemons, L. N. Locke, Martha G. Sheerar, R. M. Duncan, Virginia S. Hinshaw, B.C. Easterday
1990, Avian Diseases (34) 120-128
Seventy-six type A influenza viruses recovered from waterfowl in Wisconsin, California, South Dakota, Florida, Texas, Alabama, and Nebraska were tested for virulence in chickens. The challenge to chickens was intravenous inoculation of first-, second-, or third-egg-passage virus. Each of the virus strains was tested separately in three or four chickens....
Comparative susceptibility of Culex tarsalis, a Nopheles franciscanus, and Culiseta inornata (Diptera: Culicidae) to Plasmodium relictum (Haemosporidia: Plasmodiidae)
Thierry M. Work, Robert K. Washino, Charles van Riper III
1990, Journal of Medical Entomology (27) 68-71
Repeated laboratory attempts failed to infect Culiseta inornata (Williston) and Anopheles franciscanus McCracken with Plasmodium relictum as efficiently as Culex tarsalis Coquillett controls. Of 210 An. franciscanus that imbibed a replete meal from a parasitemic canary, two were found with oocysts and none with sporozoites. Of 112 Cs. inornata similarly...
Wilderness perception
Jonathan G. Taylor
1990, Book, Proceedings of the 4th World Wilderness Congress
No abstract available....
Land-surface subsidence resulting from ground-water withdrawals in the Houston-Galveston region, Texas, through 1987
R.K. Gabrysch, L.S. Coplin
1990, Report
The ground-water system in the Houston-Galveston region, Texas is composed of layers of sand and compressible clay. The system has been divided into two major aquifers, the Chicot and Evangeline, and the underlying Burkeville confining unit. The Chicot aquifer overlies the Evangeline aquifer. The Chicot aquifer contains the most permeable sand layers and...
Early-winter diet of woodland caribou in relation to snow accumulation, Selkirk Mountains, British Columbia, Canada
Eric M. Rominger, John L. Oldemeyer
1990, Canadian Journal of Zoology (68) 2691-2694
Woodland caribou (Rangifer tarandus caribou) in the southern Selkirk Mountains of British Columbia shift from a diet of primarily vascular taxa during snow-free months to an arboreal lichen – conifer diet during late winter. We present evidence that caribou diets, during the early-winter transition period, are influenced by snow accumulation...
Berry production in three whitebark pine forest types
T. Weaver, K.C. Kendall, F. Forcella
1990, Book, Proceedings--Symposium on Whitebark Pine Ecosystems : Ecology and Management of a High-Mountain Resource
In the whitebark pine /whortleberry (Pinus albicaulis/Vaccinium scoparium) habitat type of southwestern Montana, whortleberry plants produced seven to 69 berries/m2 x yr in 1974. In subalpine fir (Abies lasiocarpa) habitat types of northwestern Montana, huckleberry plants (Vaccinium globulare) may produce from 13 to 228 berries/m2 X yr. While removal of...
Bioaccumulation of selenium in birds at Kesterson Reservoir, California
Harry M. Ohlendorf, Roger L. Hothem, Christine M. Bunck, Katherine C. Marois
1990, Archives of Environmental Contamination and Toxicology (19) 495-507
This study was conducted to determine selenium (Se) concentrations in tissues of birds collected during the 1983-1985 nesting seasons at Kesterson Reservoir (an area receiving high-Se irrigation drainage water), compare them with birds from reference sites within California's Central Valley, and relate them to food-chain Se concentrations at the study...
Fluoride accumulation and bone strength in wild black-crowned night-herons
Charles J. Henny, P. M. Burke
1990, Archives of Environmental Contamination and Toxicology (19) 132-137
Fluoride was measured in femurs of black-crowned night-herons (Nycticorax nycticorax) living adjacent to a phosphate processing complex near Pocatello, Idaho. Fluoride (ash wt.) in femurs ranged from 540 μg/g to 11,000 μg/g and increased (P=0.0001) with age, but with no difference (P=0.80) between sexes. Adult males (⩾4 years) contained 5,409...
Embryotoxicity and teratogenicity of environmental contaminants to bird eggs
David J. Hoffman
1990, Book chapter, Reviews of environmental contamination and toxicology: Continuation of residue reviews
In light of recent ecological disasters such as the Exxon Valdez oil spill of 1989, which has already claimed the lives of thousands of aquatic birds with the reproductive success of countless others at risk, there is a need to evaluate the embryotoxic potential of a continuously growing number of...
Acid precipitation and food quality: Inhibition of growth and survival in black ducks and mallards by dietary aluminum, calcium and phosphorus
Donald W. Sparling
1990, Archives of Environmental Contamination and Toxicology (19) 457-463
In areas impacted by acid precipitation, water chemistry of acidic ponds and streams often changes, resulting in increased mobilization of aluminum and decreased concentration of calcium carbonate. Aluminum binds with phosphorus and inhibits its uptake by organisms. Thus, invertebrate food organisms used by waterfowl may have inadequate Ca and P...