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Publications

Publications from USGS science centers throughout the Southeast Region.

Filter Total Items: 10361

Preliminary assessment of the effects of selenium in agricultural drainage on fish in the San Joaquin Valley Preliminary assessment of the effects of selenium in agricultural drainage on fish in the San Joaquin Valley

Concentrations of total selenium were measured in whole-body samples of seven fishes from the Sacramento and San Joaquin River systems and the San Francisco Bay complex. Concentrations of selenium (up to 11 µg/g dry weight in whole-body composite samples) were highest in fish from canals and sloughs in the Grassland Water District (Grasslands) that received large inflows of subsurface...
Authors
M. K. Saiki, M.R. Jennings, S. J. Hamilton

Distribution patterns of individually identifiable West Indian manatees (Trichechus manatus) in Florida Distribution patterns of individually identifiable West Indian manatees (Trichechus manatus) in Florida

Photographs of distinctively scarred manatees (Trichechus manatus) were taken at aggregation sites throughout Florida and assembled into a catalog for identifying individuals. Resightings of known manatees in different years or at different locations enabled us to document site fidelity and long-distance movements. Of the 891 individuals included in the catalog as of August 1986, 470 (53...
Authors
J.P. Reid, G. B. Rathbun, J.R. Wilcox

A vacuum-operated pore-water extractor for estuarine and freshwater sediments A vacuum-operated pore-water extractor for estuarine and freshwater sediments

A vacuum-operated pore-water extractor for estuarine and freshwater sediments was developed and constructed from a fused-glass air stone attached with aquarium airline tubing to a 30 or 60 cc polypropylene syringe. Pore water is extracted by inserting the air stone into the sediment and creating a vacuum by retracting and bracing the syringe plunger. A hand-operated vacuum pump attached...
Authors
Parley V. Winger, Peter J. Lasier
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