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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.
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: 6158
Recent numerical changes in North American roseate terns and their conjectured cause Recent numerical changes in North American roseate terns and their conjectured cause
No abstract available.
Authors
J.J. Hatch, J. A. Spendelow, J.D. Nichols, J.E. Hines
Reconsidering paradigms of overpopulation in ungulates: white-tailed deer at Saratoga National Historical Park Reconsidering paradigms of overpopulation in ungulates: white-tailed deer at Saratoga National Historical Park
No abstract available.
Authors
H.B. Underwood, W.F. Porter
Reproductive strategies for coping with poor conditions: responses of roseate terns to low food availability during the egg-laying period at Falkner Island, Connecticut Reproductive strategies for coping with poor conditions: responses of roseate terns to low food availability during the egg-laying period at Falkner Island, Connecticut
No abstract available.
Authors
J. A. Spendelow, James M. Zingo, Jeff S. Hatfield
Results of an experiment to lead cranes on migration behind motorized ground vehicles Results of an experiment to lead cranes on migration behind motorized ground vehicles
Ten greater sandhill cranes (Grus canadensis tabida), trained to enter and ride in a specially equipped truck, were transported at 80? days of age from their rearing site at Patuxent Wildlife Research Center (Patuxent), Maryland, to a reintroduction site located within the species? former breeding range in northern Arizona. After 5 additional weeks of training, these juvenile cranes were...
Authors
D. H. Ellis, B. Clauss, T. Watanabe, R.C. Mykut, M. Kinloch, Catherine H. Ellis
Semen collection and fertility in naturally fertile sandhill cranes Semen collection and fertility in naturally fertile sandhill cranes
Aviculturists often ask if semen collection will interfere with fertility in naturally fertile pairs of cranes. We used 12 naturally fertile Florida sandhill crane (Grus canadensis pratensis) pairs for this study, 6 control and 6 experimental. All pairs had produced fertile eggs in previous years and were in out-of-doors pens scattered throughout different pen complexes, within auditory...
Authors
G. Chen, G.F. Gee, Jane M. Nicolich, J.A. Taylor
Soil, plant, and structural considerations for surface barriers in arid environments: Application of results from studies in the Mojave Desert near Beatty, Nevada Soil, plant, and structural considerations for surface barriers in arid environments: Application of results from studies in the Mojave Desert near Beatty, Nevada
The suitability of a waste-burial site depends on hydrologic processes that can affect the near-surface water balance. In addition, the loss of burial trench integrity by erosion and subsidence of trench covers may increase the likelihood of infiltration and percolation, thereby reducing the effectiveness of the site in isolating waste. Although the main components of the water balance...
Authors
Brian J. Andraski, David E. Prudic
Status and restoration of the Etowah River, an imperiled Southern Appalachian Ecosystem Status and restoration of the Etowah River, an imperiled Southern Appalachian Ecosystem
Abstract not supplied at this time
Authors
N.M. Burkhead, S. J. Walsh, B. J. Freeman, J.D. Williams
Status of aquatic mollusks in the southeastern United States: a downward spiral of diversity Status of aquatic mollusks in the southeastern United States: a downward spiral of diversity
Abstract not supplied at this time
Authors
R. J. Neves, A.E. Bogan, J.D. Williams, S.A. Ahlstedt, P.D. Hartfield
Studies of sea ducks in the Atlantic flyway Studies of sea ducks in the Atlantic flyway
No abstract available.
Authors
D.G. Krementz, David F. Caithamer
Subspecies composition of sandhill crane harvest in North Dakota, 1968-94 Subspecies composition of sandhill crane harvest in North Dakota, 1968-94
North Dakota is a major fall staging area for the Midcontinent Population of sandhill cranes (Grus canadensis), which is composed of three subspecies: the greater (G. c. tabida), Canadian (G. c. rowani), and lesser (G. c. canadensis). The number of cranes killed by hunters in North Dakota averaged 6,793 during 1990-94 seasons, ranking second highest among crane-hunting states. The...
Authors
W. L. Kendall, Douglas H. Johnson, S. C. Kohn
Survival and fates of staging juvenile, female mallards in the Vermont / Quebec border region Survival and fates of staging juvenile, female mallards in the Vermont / Quebec border region
We alternately marked 80 juvenile, female mallards (Anas platyrhynchos), half with transmitters and bands and half with only bands in 1990 and 1991. Survival of radio-marked ducks was monitored daily and then summarized weekly for the periods 31 August - 6 December, 1990 (weeks 5-18) and 11 September - 6 December, 1991) (weeks 6-18). The pattern of survival throughout the staging period...
Authors
J. R. Longcore, D.G. McAuley, C.M. Bunck