Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9967
Influence of ingested lead on body mass of wintering canvasbacks
We determined the prevalence of lead shotgun pellets in gizzards of canvasbacks (Aythya valisineria) collected at Catahoula Lake and the Mississippi River Delta, Louisiana, during winter 1987-88 to assess the influence of ingested lead shot on canvasback body mass. The prevalence of ingested lead shot was significantly higher at Catahoula Lake (27%) than at the Mississippi River Delta (4%). Canvas
Authors
William L. Hohman, Ronald D. Pritchert, Richard M. Pace, Dennis W. Woolington, Robert Helm
Basin analysis, paleoenvironment reconstruction and tectonic structures: Application of geologic interpretations to regional ground-water assessment in large sedimentary basins
No abstract available.
Authors
Robert A. Renken, Rene A. Barker, Fernando Gomez-Gomez
Laboratory simulation of the effects of overburden stress on the specific storage of shallow artesian aquifers
A laboratory experiment to measure the specific storage of an aquifer material was conducted. A known dead load, simulating an overburden load, was applied to a sample of completely saturated aquifer material contained inside a cylinder. After the dead load was applied, water was withdrawn from the sample, causing the hydrostatic pressure to decrease and the effective stress to increase. The resul
Authors
Nicasio Sepúlveda, A. L. Zack
Concentrations of boron, molybdenum, and selenium in chinook salmon
The concentrations of boron, molybdenum, and selenium in young chinook salmon Oncorhynchus tshawytscha were determined in three partial life cycle chronic toxicity studies. In each study, fish were exposed to a mixture of boron, molybdenum, selenate, and selenite in the proportions found in subsurface agricultural drainage water in the basin of the San Joaquin Valley, California. Tests were conduc
Authors
Steven J. Hamilton, Raymond H. Wiedmeyer
Behavioral toxicology: Stimulating challenges for a growing discipline
Since the early 1970s, contaminants have been shown to affect virtually every aspect of behavior in terrestrial and aquatic organisms. Behavior inte- grates many cellular processes and is essential to the viability of the organism, the population and the community. Therefore, observations of behavior provide a unique toxicological perspective - one that links the biochemical and ecological conse-
Authors
Edward E. Little
Compilation of hydrologic data for the Edwards aquifer, San Antonio area, Texas, 1989, with 1934-89 summary
No abstract available.
Authors
G.M. Nalley, M. W. Thomas
National contaminant biomonitoring program: concentrations of arsenic, cadmium, copper, lead, mercury, selenium, and zinc in U.S. Freshwater Fish, 1976–1984
From late 1984 to early 1985, the U.S. Fish and Wildlife Service collected a total of 315 composite samples of whole fish from 109 stations nationwide, which were analyzed for arsenic, cadmium, copper, lead, mercury, selenium, and zinc. Geometric mean, maximum, and 85th percentile concentrations (μg/g wet weight) for 1984 samples were as follows: arsenic-0.14, 1.5, 0.27; cadmium-0.03, 0.22, 0.05;
Authors
Christopher J. Schmitt, William G. Brumbaugh
National contaminant biomonitoring program: Residues of organochlorine chemicals in U.S. Freshwater Fish, 1976–1984
The U.S. Fish and Wildlife Service periodically determines concentrations of organochlorine chemicals in freshwater fish collected from a nationwide network of stations as part of the National Contaminant Biomonitoring Program (NCBP, formerly a part of the National Pesticide Monitoring Program). From late 1984 to early 1985, a total of 321 composite fish samples were collected from 112 stations an
Authors
Christopher J. Schmitt, Jim L. Zajicek, Paul H. Peterman
Determination and occurrence of AHH-active polychlorinated biphenyls, 2,3,7,8-tetrachloro-p-dioxin and 2,3,7,8-tetrachlorodibenzofuran in Lake Michigan sediment and biota. The question of their relative toxicological significance
An analytical procedure has been developed for the determination of the 18 PCB congeners which are inducers of methylcholanthrene-like mixed function oxidase activity in animals and include the most toxic PCBs. Determinations of the toxic PCB congeners in samples of eggs of predatory fish and piscivorous birds of the Great Lakes and in Aroclor mixtures demonstrate that the apparent toxic potency o
Authors
Lawrence M. Smith, Ted R. Schwartz, Kevin Feltz, Timothy J. Kubiak
Burrow associates of the gopher tortoise : proceedings of the 8th annual meeting of the Gopher Tortoise Council
No abstract available.
Authors
C. Kenneth Dodd, R.E. Ashton, R. Franz, E. Wester
Water-quality trends and basin activities and characteristics for the Albemarle-Pamlico estuarine system, North Carolina and Virginia
The Albemarle-Pamlico estuarine system has a total basin area of nearly 31,000 square miles and includes the Neuse, Tar, Pamlico, Roanoke, Chowan, and Alligator Rivers, and the Albemarle, Pamlico, Currituck, Croatan, and Roanoke Sounds. Albemarle Sound receives the greatest freshwater inflow of all the sounds in the estuarine system. Inflow to this sound averages about 13,500 cubic feet per second
Authors
D.A. Harned, M.S. Davenport