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Filter Total Items: 16905

Occurrence of organochlorine compounds in whole fish tissue from streams of the lower Susquehanna River Basin, Pennsylvania and Maryland, 1992 Occurrence of organochlorine compounds in whole fish tissue from streams of the lower Susquehanna River Basin, Pennsylvania and Maryland, 1992

Tissue samples of whole body white sucker (Catostomus commersoni) were collected at 15 sites and smallmouth bass (Micropterus dolomieu) were collected at 5 sites during 1992 in the Lower Susquehanna River Basin to determine the occurrence and distribution of 28 selected organochlorine compounds as part of the U.S. Geological Survey’s National Water-Quality Assessment (NAWQA) Program...
Authors
Michael D. Bilger, Robin A. Brightbill, Harry L. Campbell

Distribution of Trichloroethylene and Geologic Controls on Contaminant Pathways near the Royal River, McKin Superfund Site Area, Gray, Maine Distribution of Trichloroethylene and Geologic Controls on Contaminant Pathways near the Royal River, McKin Superfund Site Area, Gray, Maine

Vapor-diffusion samplers were used in the autumn of 1997 to determine the lateral extent and distribution of concentrations of a trichloroethylene (TCE) plume in the ground-water discharge area near the McKin Superfund Site, Gray, Maine. Analyses of vapor in the samplers identified a plume about 800 feet wide entering the river near Boiling Springs, an area of ground-water discharge on...
Authors
Forest P. Lyford, L.E. Flight, Janet Radway Stone, Scott Clifford

Basic Requirements for Collecting, Documenting, and Reporting Precipitation and Stormwater-Flow Measurements Basic Requirements for Collecting, Documenting, and Reporting Precipitation and Stormwater-Flow Measurements

Accurate and representative precipitation and stormwater-flow data are crucial for use of highway- or urban-runoff study results, either individually or in a regional or national synthesis of stormwater-runoff data. Equally important is information on the level of accuracy and representativeness of this precipitation and stormwaterflow data. Accurate and representative measurements of
Authors
Peter E. Church, Gregory E. Granato, David W. Owens

Responsiveness of gill Na+/K+-ATPase to cortisol is related to gill corticosteroid receptor concentrations in juvenile rainbow trout Responsiveness of gill Na+/K+-ATPase to cortisol is related to gill corticosteroid receptor concentrations in juvenile rainbow trout

A positive relationship between receptor concentration and tissue responsiveness is an often-assumed and rarely tested principle in endocrinology. In salmonids, seasonal changes in levels of plasma cortisol and gill corticosteroid receptors (CRs) during the spring indicate a potential role for this hormone in the parr–smolt transformation. It is not known whether these seasonal changes...
Authors
J. M. Shrimpton, S. D. McCormick

Physical, chemical, and biological data for selected streams in Chester County, Pennsylvania, 1981-94 Physical, chemical, and biological data for selected streams in Chester County, Pennsylvania, 1981-94

Physical, chemical, and biological data were collected at 51 sampling sites in Chester County, Pa., from 1970 through 1994 as part of the Stream Conditions of Chester County Program. This report presents data collected from 1981 through 1994. Physical data include water temperature, instantaneous stream discharge, pH, alkalinity, specific conductance, and dissolved oxygen. Chemical data...
Authors
Andrew G. Reif

Order Didelphidae Order Didelphidae

No abstract available.
Authors
A. L. Gardner
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