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Page 6270, results 156726 - 156750

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Migrational homing by a pair of mallards
T.J. Dwyer, S.R. Derrickson, D.S. Gilmer
1973, The Auk (90) 687-687
It is generally assumed that wild, North American female dabbling ducks (Anatinae: Anatini) select new mates each year and may return to the same nesting areas in consecutive years (McKinney 1964, Wildfowl 16: 93). Lincoln (1934, Bird-Banding 5: 151) first documented migrational homing in a female Mallard (Anas platyrhynchos), and...
Federal Great Lakes fishery research objectives, priorities, and projects
Howard D. Tait
1973, Conference Paper, Proceedings of the First Federal Conference on the Great Lakes
Fishery productivity of the Great Lakes has declined drastically since settlement of the area. Premium quality fishes of the Great Lakes such as whitefish, lake trout, and walleyes have been replaced by less desired species. This change is attributed to selective overfishing, pollution, and the extreme instability of fish populations....
The role of the Bureau of Sport Fisheries and Wildlife in the Great Lakes
F. Eugene Hester
1973, Conference Paper, Proceedings of the First Federal Conference on the Great Lakes
Ecological blunders of man, such as timber exploitation, draining of wetlands, construction of canals and dams, and pollution have been mainly responsible for serious environmental degradation and catastrophic losses of fish and wildlife values in the Great Lakes Basin. Consequently, the major emphasis of the Bureau of Sport Fisheries and...
Selective predation by mink, Mustela vison, on waterfowl
Alan B. Sargeant, George A. Swanson, Harold A. Doty
1973, American Midland Naturalist (89) 208-214
Predation by mink (Mustela vison) on three types of ducks (captive, pen-reared-released and wild) was documented in two studies at the Northern Prairie Wildlife Research Center, Jamestown, North Dakota. In the first study, 36 of 60 flightless adult and juvenile ducks held on eight 0.1-acre experimental ponds disappeared between 10...
Rapid determination of sulfur in rocks
Leonard Shapiro
1973, Journal of Research of the U.S. Geological Survey (1) 81-84
Sulfur is determined turbidimetrically as barium sulfate after an aqua regia attack. The turbidity is formed in an ammoniacal solution from which R2O3 has been centrifuged. Reproducibility of turbidity is obtained by adding barium chloride as a solid rather than as a solution. Sulfur is determined in the range 0.01-4 percent within ±0.02 absolute, or...
Determination of lead, uranium, thorium, and thallium in silicate glass standard materials by isotope dilution mass spectrometry
I. L. Barnes, E. L. Garner, J. W. Gramlich, L. J. Moore, T. J. Murphy, L. A. Machlan, W. R. Shields, Mitsunobu Tatsumoto, R. J. Knight
1973, Analytical Chemistry (45) 880-885
A set of four standard glasses has been prepared which have been doped with 61 different elements at the 500-, 50-, 1-, and 0.02-ppm level. The concentrations of lead, uranium, thorium, and thallium have been determined by isotope dilution mass spectrometry at a number of points in each of the...
The Great Tunisian Flood
Frank Eldridge Clarke
1973, Journal of Research of the U.S. Geological Survey (1) 121-124
In the autumn of 1969, unusual meteorological conditions over Europe and northern Africa caused an enormous persistent desert storm in Tunisia and eastern Algeria. Poorly developed drainage patterns and gypsum-encrusted surfaces of these desert regions intensified effects of the storm and contributed to the heavy loss of life and property. Destruction of Roman bridges suggests...
New data on cuprobismutite
Charles M. Taylor, Arthur S. Radtke, C. L. Christ
1973, Journal of Research of the U.S. Geological Survey (1) 99-103
Cuprobismutite from Tunnel Extension Number Two mine, Ohio mining district, Utah, was chemically analyzed using theelectron microprobe.  Its empirical formula was determined to be Cu20.8 Ag0.97 Pb0.35 Mn0.22 Bi26.7Sb0.06 Te0.05 Se0.55 S50.4.  The tentative conclusion is that unsubstituted cuprobismutite has the chemical formula 6Cu2S*6Bi2S3 rather than the previously ascribed formula 6Cu2S*6Bi2S3 and that cuprobismutite...
Drought displaced movement of North American pintails into Siberia
Charles J. Henny
1973, Journal of Wildlife Management (37) 23-29
During the years 1954-70, 230 pintails (Anas acuta) banded in North America were reported from eastern Asia, primarily Siberia. Most of the birds were shot on the breeding grounds in May. The movement into eastern Asia of pintails banded in the interior of North America was directly correlated with the...
The selenium content of U.S.G.S. standard rocks
M. M. Schnepfe, F.J. Flanagan
1973, Chemical Geology (12) 77-80
Selenium was determined in duplicate portions from three bottles of six U.S.G.S. standard rocks by a spect rofluorimetric procedure. The following averages, as p.p.m. Se, were obtained: PCC-1, 0.031; GSP-1, 0.088; BCR-1, 0.12; SCo-1, 0.91; MAG-1, 1.3; and SGR-1, 3.7. One-way analysis...
Point of zero charge of weathered forsterite
R.W. Luce, George A. Parks
1973, Chemical Geology (12) 147-153
The point of zero charge of forsterite shifts from an estimated 8.9 for the unaltered mineral to 8.4 and 8.0, respectively, after being weathered artificially for 1 h and 4 h. These results corroborate the presence of magnesium-deficient surfaces on the weathered...
Floods in New York, 1971
F. Luman Robison
1973, Report
This report, for the calendar year 1971, was prepared at the request of the New York State Department of Transportation under provisions of an agreement between the New York State Department of Environmental Conservation and the U.S. Geological Survey fore a cooperative statewide program investigate the water resources of the...