Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10486
Biomonitoring of Environmental Status and Trends (BEST) Program: Field Procedures for Assessing the Exposure of Fish to Environmental Contaminants Biomonitoring of Environmental Status and Trends (BEST) Program: Field Procedures for Assessing the Exposure of Fish to Environmental Contaminants
This document describes procedures used to collect information, tissues, and fluids for documenting the exposure of fish to environmental contaminants. For the procedures described here, fish are captured (preferably by electrofishing) and held alive until processing (generally
Authors
Christopher J. Schmitt, Vicki Blazer, Gail M. Dethloff, Donald E. Tillitt, Timothy S. Gross, Wade L. Bryant, L. Rod DeWeese, Stephen B. Smith, Ronald W. Goede, Timothy M. Bartish, Timothy J. Kubiak
Sedimentation, sea-level rise and circulation in Florida Bay Sedimentation, sea-level rise and circulation in Florida Bay
Authors
Water Resources Division U.S. Geological Survey
Site-specific estimation of peak-streamflow frequency using generalized least-squares regression for natural basins in Texas Site-specific estimation of peak-streamflow frequency using generalized least-squares regression for natural basins in Texas
The U.S. Geological Survey, in cooperation with the Texas Department of Transportation, has developed a computer program to estimate peak-streamflow frequency for ungaged sites in natural basins in Texas. Peak-streamflow frequency refers to the peak streamflows for recurrence intervals of 2, 5, 10, 25, 50, and 100 years. Peak-streamflow frequency estimates are needed by planners...
Authors
William H. Asquith, R.M. Slade
Characteristics of water-quality data for Lake Houston, selected tributary inflows to Lake Houston, and the Trinity River near Lake Houston (a potential source of interbasin transfer), August 1983-September 1990 Characteristics of water-quality data for Lake Houston, selected tributary inflows to Lake Houston, and the Trinity River near Lake Houston (a potential source of interbasin transfer), August 1983-September 1990
Lake Houston, a reservoir completed in 1954 about 25 miles east-northeast of Houston, Texas, is a principal surface-water source for the city of Houston. The increase in water supply to meet future demands is expected to be accommodated by supplementing surface-water inflows to Lake Houston. The Trinity River is considered a potential source for interbasin transfer of water to Lake...
Authors
Fred Liscum, R.L. Goss, Walter Rast
Ground-water data in Orange County and adjacent counties, Texas, 1985-90 Ground-water data in Orange County and adjacent counties, Texas, 1985-90
The lower unit of the Chicot aquifer is a major source of freshwater for Orange County, Texas. In 1989, the average rate of ground-water withdrawal from the lower unit of the Chicot aquifer in Orange County for municipal and industrial use was 13.8 million gallons per day, a substantial decrease from the historical high of 23.1 million gallons per day in 1972. The average withdrawal for...
Authors
Mark C. Kasmarek
Hydrogeology of the surficial aquifer system in Southwest Florida Hydrogeology of the surficial aquifer system in Southwest Florida
Restoration and management of the south Florida ecosystem will be guided by hydrologic models that simulate water flowing through the wetlands and shallow subsurface aquifers beneath them. The restoration of the ecosystem is, essentially, the restoration of the natural hydrologic system. As surface water is re-diverted from manmade canals to its more natural state as overland flow...
Authors
Water Resources Division U.S. Geological Survey
The factors controlling species density in herbaceous plant communities: An assessment The factors controlling species density in herbaceous plant communities: An assessment
This paper evaluates both the ideas and empirical evidence pertaining to the control of species density in herbaceous plant communities. While most theoretical discussions of species density have emphasized the importance of habitat productivity and disturbance regimes, many other factors (e.g. species pools, plant litter accumulation, plant morphology) have been proposed to be important...
Authors
J.B. Grace
The use of modeling in restoration ecology: The Everglades case The use of modeling in restoration ecology: The Everglades case
No abstract available.
Authors
Donald L. DeAngelis
Induction of triploidy and tetraploidy in Nile tilapia, Oreochromis niloticus (L.) Induction of triploidy and tetraploidy in Nile tilapia, Oreochromis niloticus (L.)
Induction of triploidy and tetraploidy in Nile tilapia, Oreochromis niloticus, was investigated by heat shock, cold shock, hydrostatic pressure, and/or chemicals (cytochalasin A, B, and D). Additionally, efficacy of combined protocols was determined. Heat shock 10 min after fertilization induced triploidy when incubation temperature was 24 C but not when incubation temperature was 31 C...
Authors
A.-R.A. El Gamal, K. B. Davis, J.A. Jenkins, Torrans E. Les
Fishes of Bermuda: history, zoogeography,annotated checklist, and identification keys Fishes of Bermuda: history, zoogeography,annotated checklist, and identification keys
No abstract available.
Authors
William F. Smith-Vaniz, Bruce B. Collette, Brian E. Luckhurst
A new species of Gelanoglanis from the Orinoco and Amazon river basins, with comments on miniaturization within the genus (Siluriformes: Auchenipteridae: Centromochlinae) A new species of Gelanoglanis from the Orinoco and Amazon river basins, with comments on miniaturization within the genus (Siluriformes: Auchenipteridae: Centromochlinae)
No abstract available.
Authors
Luisa Maria Soares-Porto, Stephen J. Walsh, Leo G. Nico, Joaquim M. Netto