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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: 6155
Banding as a tool in bird studies Banding as a tool in bird studies
No abstract available.
Authors
G.M. Jonkel
Biotransformation of selected chemicals by fish Biotransformation of selected chemicals by fish
Abstract not submitted to date
Authors
J. L. Allen, V. K. Dawson, J. B. Hunn
Bird communities associated with succession and management of lowland conifer forests Bird communities associated with succession and management of lowland conifer forests
Data from published bird censuses were used to determine changes in avian communities in relation to plant succession, fire, type conversion, and timber management practices in lowland conifer forests in the northeastern United States. With modifications in current logging practices, habitat for the bird species that nest in undisturbed stands can be provided. Management guidelines are
Authors
D.K. Dawson
Brain cholinesterase activities of passerine birds in forests sprayed with cholinesterase inhibiting insecticides Brain cholinesterase activities of passerine birds in forests sprayed with cholinesterase inhibiting insecticides
Brain cholinesterase activities were determined in passerines collected from northwestern forests that had been sprayed with trichlorfon, acephate, and carbaryl at 0.56, 1.13 and 2.26 kg/ha. Trichlorfon and carbaryl inhibited cholinesterase activity slightly in only a few birds, primarily canopy dwellers. In contrast, acephate caused marked inhibition of cholinesterase activity in nearly...
Authors
J.G. Zinkl, Charles J. Henny, P.J. Shea
Chlordane in birds: A study of lethal residues and loss rates Chlordane in birds: A study of lethal residues and loss rates
Lethal residues of heptachlor epoxide in brains of birds fed heptachlor ranged from 9 to 27 ppm wet weight; residues of oxychlordane in birds fed oxychlordane ranged from 6 to 16 ppm; both were diagnostically distinct from those in equally exposed survivors. In birds fed chlordane, brains of those that died contained less than 30% of these amounts but also contained trans-nonachlor...
Authors
L.F. Stickel, W. H. Stickel, R.D. McArthur, D.L. Hughes
Cold-blooded vertebrate cell and tissue culture Cold-blooded vertebrate cell and tissue culture
No abstract available at this time
Authors
K. Wolf
Distribution and stable-isotope composition of carbon in San Francisco Bay Distribution and stable-isotope composition of carbon in San Francisco Bay
No abstract available.
Authors
E.C. Spiker, L. E. Schemel
Effect of forest fragmentation on bird populations Effect of forest fragmentation on bird populations
Many of the insectivorous songbird species that winter in the tropics are dependent on large unbroken tracts of forest during the breeding season. These species are disappearing from localities where forests are becoming fragmented. By long-range planning, managers can prevent local extinctions of these area-sensitive birds through use of such techniques as management in large units...
Authors
C.S. Robbins
Effects of heptachlor-treated cereal grains on Canada geese in the Columbia Basin Effects of heptachlor-treated cereal grains on Canada geese in the Columbia Basin
In 1976 and 1977, die-offs of birds of several species occurred in Umatilla and Morrow counties, Oregon. Detection of high levels of heptachlor epoxide (HE) in tissues of Canada geese (Branta canadensis) prompted this study to determine the extent and impact of heptachlor contamination on geese on two study areas on the Columbia River--the Umatilla National Wildlife Refuge (Umatilla) in...
Authors
L. J. Blus, Charles J. Henny, D.J. Lenhart, E. Cromartie