Book Chapters
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: 6063
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
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, retention o
Authors
C.S. Robbins
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 Oregon and
Authors
L. J. Blus, C. J. Henny, D.J. Lenhart, E. Cromartie
Endrin in birds: Lethal residues and secondary poisoning
Endrin residues in brains that are diagnostic of death were determined for several species of birds. Residues of 0.8 ppm or more of endrin in brain meant death; 0.6 ppm or less meant survival; between was a zone of overlap. These criteria indicate that some wild birds of the U.S., particularly white pelicans in the Northwest and two bald eagles, have been killed by endrin. Signs of endrin poison
Authors
W. H. Stickel, W. L. Reichel, D.L. Hughes
Endrin versus 12-ketoendrin in birds and rodents
British workers showed that in rats the endrin metabolite, 12-ketoendrin, was five times as toxic as endrin, was probably the ultimate cause of death, and was the main form of endrin in the brain at death. In cows and rabbits, however, they detected little of this metabolite. They found none in hens. We found no 12-ketoendrin in birds of four orders that had been heavily exposed to or killed by
Authors
W. H. Stickel, T. E. Kaiser, W. L. Reichel
Estimating population densities from variable circular plot surveys
No abstract available.
Authors
F.L. Ramsey, J. M. Scott
Experimental lead poisoning in bald eagles
Captive, crippled bald eagles unsuitable for release were fed lead shot to determine diagnostic criteria for lead poisoning. The eagles were fluoroscoped and bled periodically to determine shot retention and blood delta--aminolevulinic acid dehydratase activity. Microscopic examination revealed renal tubular degeneration, arterial fibrinoid necrosis and myocardial necrosis. Acid-fast intra-nuclear
Authors
H. Pattee, S. Wiemeyer, P. Hoffman, J. Carpenter, L. Sileo
Fish diseases
No abstract available at this time
Authors
S. F. Snieszko, G. L. Hoffman, P. E. McAllister
Fish diseases
No abstract available at this time
Authors
G. L. Bullock, F. P. Meyer, S. F. Snieszko, K.E. Wolf