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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 6173
Distribution and abundance of aquatic vegetation in the upper Chesapeake Bay, 1971-1974 Distribution and abundance of aquatic vegetation in the upper Chesapeake Bay, 1971-1974
No abstract available.
Authors
J.A. Kerwin, R. E. Munro, W.W.A. Peterson
Distribution and abundance of non-waterfowl avifauna of the lower Columbia River Basin Distribution and abundance of non-waterfowl avifauna of the lower Columbia River Basin
No abstract available.
Authors
J. M. Scott, R.T. Reynolds
Dominance and dominance-related behavior in the whooping crane Dominance and dominance-related behavior in the whooping crane
No abstract available.
Authors
C. B. Kepler
Faunal remains from the excavated sites Faunal remains from the excavated sites
No abstract available.
Authors
C. L. Douglas
Foodborne parasites Foodborne parasites
No abstract available at this time
Authors
G.R. Healy, G.J. Jackson, Hoffman G. L. Lichtenfels J. R., T.C. Cheng
Incidence of lead shot in canvasbacks Incidence of lead shot in canvasbacks
During 1975 and 1976, 2,544 canvasbacks (Aythya valisineria) from North Dakota, Wisconsin, Illinois, and Maryland were flouroscoped to determine the incidence of body shot. A significant increase from west to east was detected in the incidence of shot for immatures from the four states. The incidence of shot in immatures after the 1975-76 hunting season was 18 percent in Maryland and 20...
Authors
Matthew C. Perry
Inhibition of mallard salt gland function by DDE and organophosphates Inhibition of mallard salt gland function by DDE and organophosphates
The effects of selected environmental pollutants on avian salt gland function were studied in the mallard duck, Anas pZatyrhynchos. DDE and several organophosphates were found to have an inhibitory effect on the ability of these glands to concentrate and secrete salt from the body. DDE significantly reduced secretion rates from the salt glands. More severe effects were observed following...
Authors
Milton Friend, John H. Abel
Monitoring the breeding habitats of migratory waterfowl Monitoring the breeding habitats of migratory waterfowl
No abstract available at this time
Authors
D.S. Gilmer, A.T. Klett, E.A. Work
Mortality in captive sandhill cranes at the Patuxent Wildlife Research Center, 1966-1975 Mortality in captive sandhill cranes at the Patuxent Wildlife Research Center, 1966-1975
No abstract available.
Authors
J. W. Carpenter, L. N. Locke, J.C. Miller
Nighttime tests of remote sensors for census of sandhill cranes Nighttime tests of remote sensors for census of sandhill cranes
No abstract available.
Authors
R. E. Munro, J. C. Lewis
Preliminary assessment of aerial photography techniques for canvasback population analysis Preliminary assessment of aerial photography techniques for canvasback population analysis
Recent intensive research on the canvasback has focused attention on the need for more precise estimates of population parameters. During the 1972-75 period, various types of aerial photographing equipment were evaluated to determine the problems and potentials for employing these techniques in appraisals of canvasback populations. The equipment and procedures available for automated...
Authors
R. E. Munro, D.L. Trauger
Studies of bighorn in Joshua Tree National Monument Studies of bighorn in Joshua Tree National Monument
No abstract available at this time
Authors
C. L. Douglas