Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16759
USGS ground-water flow model : an essential tool for managing the water supply of the Virginia Coastal Plain USGS ground-water flow model : an essential tool for managing the water supply of the Virginia Coastal Plain
Virginia needs a reliable water supply to sustain its growing population and expanding economy. In 1990, the aquifers in the Coastal Plain supplied about 100 million gallons per day (mgd) to the citizens, businesses, and industries of Virginia. It is estimated that by the year 2000, demand will increase by another 10 mgd and likely will continue to increase in future years. Ground water...
Authors
Martha L. Erwin, Randolph E. McFarland, Bruce T. Scott
Comparative microhabitat use of ecologically similar benthic fishes Comparative microhabitat use of ecologically similar benthic fishes
Although benthic insectivorous fishes such as darters and sculpins represent a significant component of riffle communities, few studies have compared the habitat use of these non-related but ecologically similar fishes. The objectives of this study were to examine the habitat use of Etheostoma olmstedi (tessellated darter) compared to Cottus bairdi (mottled sculpin) in Nescopeck Creek...
Authors
E. van Snik Gray, Jay R. Stauffer
A taxonomic study of crested caracaras (Falconidae) A taxonomic study of crested caracaras (Falconidae)
The taxonomic status of the crested caracaras (Caracara spp., Falconidae) has been unsettled for many years. Current sources such as the AOU Check-list recognize a single species that includes three taxa formerly considered distinct, citing observations by Hellmayr and Conover (1949) on two specimens considered to be intermediate. We studied plumage characters and measurements of over...
Authors
C.J. Dove, Richard C. Banks
Lithostratigraphy, geophysics, biostratigraphy, and strontium-isotope stratigraphy of the surficial aquifer system of eastern Collier County and northern Monroe County, Florida Lithostratigraphy, geophysics, biostratigraphy, and strontium-isotope stratigraphy of the surficial aquifer system of eastern Collier County and northern Monroe County, Florida
In 1997, ten cores were drilled in eastern Collier County and northern Monroe County, within the limits of the Big Cypress National Preserve. These cores represent a continuation of the study of seven cores in western Collier County begun in 1996 and reported in Weedman and others (1997) and Edwards and others (1998). This joint U.S. Geological Survey and Florida Geological Survey...
Authors
S.D. Weedman, Frederick L. Paillet, Lucy E. Edwards, K. R. Simmons, T.M. Scott, B. R. Wardlaw, R.S. Reese, J. L. Blair
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
[Book review] A Neotropical Companion: An Introduction to the Animals, Plants, and Ecosystems of the New World Tropics,. second edition, by John Kricher, Princeton University Press, 1997 [Book review] A Neotropical Companion: An Introduction to the Animals, Plants, and Ecosystems of the New World Tropics,. second edition, by John Kricher, Princeton University Press, 1997
No abstract available.
Authors
C.S. Robbins
Sex determination of the Acadian Flycatcher using discriminant analysis Sex determination of the Acadian Flycatcher using discriminant analysis
I used five morphometric variables from 114 individuals captured in Arkansas to develop a discriminant model to predict the sex of Acadian Flycatchers (Empidonax virescens). Stepwise discriminant function analyses selected wing chord and tail length as the most parsimonious subset of variables for discriminating sex. This two-variable model correctly classified 80% of females and 97% of...
Authors
R.R. Wilson
Birds and the Animal Welfare Act Birds and the Animal Welfare Act
No abstract available.
Authors
Glenn H. Olsen
Pesticides in surface water in the Connecticut, Housatonic, and Thames River basins, 1992-95 Pesticides in surface water in the Connecticut, Housatonic, and Thames River basins, 1992-95
No abstract available.
Authors
Marc James Zimmerman