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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
The North American Breeding Bird Survey The North American Breeding Bird Survey
A brief history of the North American Breeding Bird Survey (BBS) and a discussion of the technique are presented. The approximately 2000 random roadside routes conducted yearly during the breeding season throughout North America produce an enormous bank of data on distribution and abundance of breeding birds with great potential use. Data on about one million total birds of 500 species...
Authors
D. Bystrak
The relation between exploration economics and the characteristics of mineral deposits The relation between exploration economics and the characteristics of mineral deposits
No abstract available.
Authors
Donald A. Singer, D.L. Mosier
The role of captive propagation in preserving endangered species The role of captive propagation in preserving endangered species
No abstract available.
Authors
J. W. Carpenter, S.R. Derrickson
The role of observer bias in the North American Breeding Bird Survey The role of observer bias in the North American Breeding Bird Survey
Ornithologists sampling breeding bird populations are subject to a number of biases in bird recognition and identification. Using Breeding Bird Survey data, these biases are examined qualitatively and quantitatively, and their effects on counts are evaluated. Differences in hearing ability and degree of expertise are the major observer biases considered. Other, more subtle influences are...
Authors
C. A. Faanes, D. Bystrak
Theoretical Wenner and Schlumberger vertical electrical soundings Theoretical Wenner and Schlumberger vertical electrical soundings
No abstract available.
Authors
David V. Haines, D. L. Campbell
Viral diseases of fish and their relation to public health Viral diseases of fish and their relation to public health
No abstract available at this time
Authors
K. Wolf
Vulnerability of young lake trout to predation after chronic exposure to PCB's and DDE Vulnerability of young lake trout to predation after chronic exposure to PCB's and DDE
The vulnerability of fry of Lake Michigan lake trout (Salvelinus namaycush) to predation by rainbow trout (Salmo gairdneri) was tested after the fry had been exposed to PCB's, DDE, and a combination of these contaminants in both water and food at concentrations corresponding to ambient levels (1X) in water and plankton in Lake Michigan and at levels 5 and 25 times higher. Vulnerability...
Authors
Michael J. Mac
Biostratigraphy of the Tertiary strata of the core Biostratigraphy of the Tertiary strata of the core
No abstract available.
Authors
T. G. Gibson, George W. Andrews, Laurel M. Bybell, R. J. Witmer, D. S. Van Nieuwenhuise
Bibliography: Solar stimulated luminescence and related topics Bibliography: Solar stimulated luminescence and related topics
The purpose of the Workshop on Luminescence Techniques was threefold: (1) to review the state-of-the-art capabilities of luminescence methods, (2) to consider a variety of concepts for the development of future luminescence sensor systems, and (3) to discuss appropriate research and development strategies for advancing the current state-of-the-art.
Surficial deposits, weathering processes, and evolution of an inner Coastal Plain landscape, Augusta, Georgia Surficial deposits, weathering processes, and evolution of an inner Coastal Plain landscape, Augusta, Georgia
No abstract available.
Authors
Wayne L. Newell, Milan J. Pavich, David C. Prowell, Helaine W. Markewich, Thorton L. Neathery, Robert W. Frey