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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.
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A stochastic population model of mid-continental mallards A stochastic population model of mid-continental mallards
We developed a simulation model that integrates infonnation on factors affecting the population dynamics of mallards in the mid-continental region of the United States. In the model we vary age, body mass, and reproductive and molt status of simulated females. Females use several types of nesting and foraging habitat in 15 geographic areas. Deterministic and stochastic events cause...
Authors
Rolf R. Koford, J.R. Sauer, Douglas H. Johnson, J.D. Nichols, M.D. Samuel
A survey of naturally occurring radionuclides in groundwa ter in selected bedrock aquifers in Connecticut and implications for public health policy A survey of naturally occurring radionuclides in groundwa ter in selected bedrock aquifers in Connecticut and implications for public health policy
No abstract available
Authors
C.J. Dupuy, D. F. Healy, M.A. Thomas, D.R. Brown, A.J. Siniscalchi, Z.F. Dembek
A warbler in trouble: Dendroica cerulea A warbler in trouble: Dendroica cerulea
The Cerulean Warbler, like other Neotropical migrants, has suffered extensive loss of breeding habitat during the past century. It differs from many other migrants in its preference for mature floodplain forest with tall trees, a habitat that has become scarce over much of the warbler's original nesting range. Sensitivity to fragmentation within remaining suitable tracts places this...
Authors
C.S. Robbins, J.W. Fitzpatrick, P.B. Hamel
Air pollution effects on terrestrial and aquatic animals Air pollution effects on terrestrial and aquatic animals
No abstract available at this time
Authors
J.R. Newman, R.K. Schreiber, E. Novakova
Alien plants at Channel Islands National Park Alien plants at Channel Islands National Park
No abstract available at this time
Authors
W. L. Halvorson
Aminostratigraphy and oxygen isotope stratigraphy of marine terrace deposits, Palos Verdes Hills and San Pedro areas, Los Angeles County, California Aminostratigraphy and oxygen isotope stratigraphy of marine terrace deposits, Palos Verdes Hills and San Pedro areas, Los Angeles County, California
No abstract available.
Authors
D.R. Muhs, G. H. Miller, J. F. Whelan, G. L. Kennedy
Amyloidosis in a captive colony of endangered masked bobwhites Amyloidosis in a captive colony of endangered masked bobwhites
No abstract available.
Authors
P. N. Klein
An overview of the regulatory aspects of chemotherapy in aquaculture An overview of the regulatory aspects of chemotherapy in aquaculture
Abstract not submitted to date
Authors
R. A. Schnick
Application of a computer simulation model to migrating white-fronted geese in the Klamath Basin Application of a computer simulation model to migrating white-fronted geese in the Klamath Basin
The Pacific greater white-fronted goose (Anser albifrons) population has declined precipitously over the past 20 years. Loss of wetland habitat in California wintering areas has had a significant effect on the population, so recovery of the population may depend on innovative management of the few remaining wetlands. A computer simulation model, REFMOD, was applied to greater white...
Authors
R.B. Frederick, William R. Clark, John Y. Takekawa
Approaches to the study of the major histocompatibility complex in birds Approaches to the study of the major histocompatibility complex in birds
No abstract available.
Authors
S.I. Jarvi, R.M. Goto, G.F. Gee, W.E. Briles, M.M. Miller
Avian toxicology of anticholinesterases Avian toxicology of anticholinesterases
No abstract available.
Authors
E. F. Hill