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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: 6151
Aquatic birds and selenium in the San Joaquin Valley Aquatic birds and selenium in the San Joaquin Valley
Kesterton Reservoir is a series of ponds comprising 1,200 acres sitting in the grasslands of the Kesterton National Wildlife Refuge. It is bounded on the east by the San Luis Drain, a concrete-lined canal that discharges agricultural drainage into the ponds at their southern end, from which point it then flows northward through the twelve ponds (see the map on the page following). Mike...
Authors
Harry M. Ohlendorf
Attack patterns of merlins hunting flocking sandpipers Attack patterns of merlins hunting flocking sandpipers
No abstract available at this time
Authors
B.E. Kus
California condor recovery program California condor recovery program
No abstract available.
Authors
N.F.R. Snyder
Conservation of migratory raptors: An overview based on fifty years of raptor banding Conservation of migratory raptors: An overview based on fifty years of raptor banding
During the 50-year period 1931-80, 422,000 raptors were banded in the United States and Canada. Encounter rates were calculated, by decades of banding, for all birds reported outside of the l0-min block of latitude and longitude where they had been banded. Encounter rates for the various raptor species decreased from about 15-25% in the 1930s to about 1-5% in the 1970s. The percentage of
Authors
C.S. Robbins
Developing a practical model to predict nesting habitat of woodland hawks Developing a practical model to predict nesting habitat of woodland hawks
No abstract available.
Authors
J. A. Mosher, K. Titus, M.R. Fuller
Distribution of exotic fishes in North America Distribution of exotic fishes in North America
No abstract available at this time
Authors
W.R. Courtenay, D.A. Hensley, J.N. Taylor, J.A. McCann
Diversity, germ plasm, and natural resources Diversity, germ plasm, and natural resources
No abstract available at this time
Authors
C. Schonewald-Cox
Effects of temperature, diet composition, feeding rate, and cumulative loading level on production of tiger muskellunge Effects of temperature, diet composition, feeding rate, and cumulative loading level on production of tiger muskellunge
No abstract available at this time
Authors
J. W. Meade, C. A. Lemm
Evaluation of a mallard productivity model Evaluation of a mallard productivity model
A stochastic model of mallard (Anas platyrhynchos) productivity has been developed over a 10-year period and successfully applied to several management questions. Here we review the model and describe some recent uses and improvements that increase its realism and applicability, including naturally occurring changes in wetland habitat, catastrophic weather events, and the migrational...
Authors
Douglas H. Johnson, L.M. Cowardin, D. W. Sparling
Evaluation of hatchery-reared lake trout for reestablishment of populations in the Apostle Islands Region of Lake Superior, 1960-84 Evaluation of hatchery-reared lake trout for reestablishment of populations in the Apostle Islands Region of Lake Superior, 1960-84
No abstract available.
Authors
Charles C. Krueger, Bruce L. Swanson, James H. Selgeby
Fishery management in cooling impoundments Fishery management in cooling impoundments
No abstract available at this time
Authors
L.L. Olmstead, James P. Clugston