Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5654
Don't release exotic fish Don't release exotic fish
Abstract not supplied at this time
Authors
Dawn P. Jennings, J.D. Williams
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 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...
Authors
Lawrence M. Smith, Ted R. Schwartz, Kevin Feltz, Timothy J. Kubiak
Encephalization quotients and life-history traits in the Sirenia Encephalization quotients and life-history traits in the Sirenia
Relative brain size in the Sirenia is unusually small. Encephalization quotients are 0.27 for Florida manatees (Trichechus manatus) and 0.38 for dugongs (Dugong dugon). Estimates for Steller's sea cow (Hydrodamalis gigas) range from 0.12 to 0.19. These values are among the lowest known for Recent mammals, and seemingly have changed little since the Eocene. A body plan specialized for the...
Authors
T. J. O'Shea, R.L. Reep
Reconnaissance surficial geologic map of the mountainous parts of Loudoun County, Virginia Reconnaissance surficial geologic map of the mountainous parts of Loudoun County, Virginia
No abstract available.
Authors
Robert B. Jacobson, R. C. McDowell, D.J. Milton, Wayne L. Newell, J. S. Pomeroy, J.S. Schindler, C.S. Southworth
National contaminant biomonitoring program: Residues of organochlorine chemicals in U.S. Freshwater Fish, 1976–1984 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...
Authors
Christopher J. Schmitt, Jim L. Zajicek, Paul H. Peterman
Feeding chronology of juvenile piranhas, Pygocentrus notatus, in the Venezuelan llanos Feeding chronology of juvenile piranhas, Pygocentrus notatus, in the Venezuelan llanos
During the 1988 rainy season, I studied the 24 h feeding chronology of juvenile (40–68 mm standard length) piranhas, Pygocentrus notatus (Characidae: Serrasalminae) from a natural population inhabiting a small savanna stream in Apure State, Venezuela. Stomach contents analyses, supported by laboratory determinations of digestion rate, showed that these fish are primarily diurnal...
Authors
L.G. Nico
Distribucion y abundancia del manati, Trichechus manatus, en Venezuela Distribucion y abundancia del manati, Trichechus manatus, en Venezuela
Abstract not supplied at this time
Authors
M. Correa-Viana, T. J. O'Shea, M.E. Ludlow, J.G. Robinson
Florida manatees: distribution, geographically referenced data sets, and ecological and behavioral aspects of habitat use Florida manatees: distribution, geographically referenced data sets, and ecological and behavioral aspects of habitat use
Abstract not supplied at this time
Authors
T. J. O'Shea, H. I. Kochman
Toxicity of organic selenium in the diet to chinook salmon Toxicity of organic selenium in the diet to chinook salmon
The toxicity of two organoselenium diets was evaluated in 90- to 120-d partial life cycle tests with two life stages of chinook salmon (Oncorhynchus tshawytscha Walbaum). One of the diets contained fish meal made from high-selenium mosquitofish (Gambusia affinis Baird and Girard) collected from the selenium-laden San Luis Drain, California (here termed SLD diet) and the other contained...
Authors
Steven J. Hamilton, Kevin J. Buhl, Neil L. Faerber, Fern A. Bullard, Raymond H. Wiedmeyer
Wetland vegetation Wetland vegetation
No abstract available.
Authors
Glenn R. Guntenspergen, F. Stearns, J.A. Kadlec
Modeling coastal Louisiana's vulnerability to oil and toxic chemical spills Modeling coastal Louisiana's vulnerability to oil and toxic chemical spills
No abstract available.
Authors
Floyd O. Stayner, James B. Johnston, James D. Scurry