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Science Quality and Integrity
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: 6195
Habitat damage by feral burros in Death Valley Habitat damage by feral burros in Death Valley
No abstract available at this time
Authors
C. L. Douglas, C. Norment
Identification of potential harvest units in the United States of the American woodcock Identification of potential harvest units in the United States of the American woodcock
Potential harvest units were examined in the United States for American woodcock (Philohela minor) based on the distribution of both direct and indirect recoveries of preseason bandings. Unweighted and weighted recoveries were used to definefour sets of units with a minimal interchange of birds. With a configuration that conforms to the existing boundary between the Atlantic and...
Authors
R.A. Coon, T.J. Dwyer, J.W. Artmann
Impact of estuarine pollution on birds Impact of estuarine pollution on birds
Pollution of estuaries affects bird populations indirectly through changes in habitat and food supply. The multi-factor pollution of Chesapeake Bay has resulted in diminution of submerged aquatic plants and consequent change in food habits of the canvasback duck. Although dredge-spoil operations can improve wildlife habitat, they often result in its demise. Pollution of estuaries also...
Authors
L. J. Blus, Stanley N. Wiemeyer, J.A. Kerwin, Rey C. Stendell, H. M. Ohlendorf, L.F. Stickel
Integration of geological remote-sensing techniques in subsurface analysis, subsurface geology, petroleum, and mining construction Integration of geological remote-sensing techniques in subsurface analysis, subsurface geology, petroleum, and mining construction
No abstract available.
Authors
J. V. Taranik, C. M. Trautwein
Maryland and the District of Columbia Maryland and the District of Columbia
No abstract available.
Authors
C.S. Robbins
Planning for the future survival of the California condor Planning for the future survival of the California condor
No abstract available.
Authors
S.R. Wilbur
Pollutants in Chesapeake bald eagle eggs Pollutants in Chesapeake bald eagle eggs
No abstract available.
Authors
Stanley N. Wiemeyer
Qualitative requirements and utilization of nutrients: fishes Qualitative requirements and utilization of nutrients: fishes
No abstract available at this time
Authors
H. G. Ketola
Quantitative analysis of American woodcock nest and brood habitat Quantitative analysis of American woodcock nest and brood habitat
Sixteen nest and 19 brood sites of American woodcock (Philohela minoI) were examined in northern lower Michigan between 15 April and 15 June 1974 to determine habitat structure associated with these sites. Woodcock hens utilized young, second-growth forest stands which were similar in species composition for both nesting and brood rearing. A multi-varIate discriminant function analysis...
Authors
A. Bourgeois
Reproductive maturation and breeding of woodcock in North Carolina Reproductive maturation and breeding of woodcock in North Carolina
Breeding woodcock (PhiJohela minor) were studied in North Carolina during the winters and springs of 1974-75 and 1975-76.. Measurements of testes and ovaries from 19 male and 30 female woodcock suggest that gonadal recrudescence in many woodcock occurs on the wintering grounds. In males, testicular recrudescence occurred as early as December and was accompanied by territory selection and...
Authors
R.T. Stamps, P.D. Doerr