Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10363
Herbicides in surface waters of the midwestern United States: The effect of spring flush Herbicides in surface waters of the midwestern United States: The effect of spring flush
Approximately three-fourths of all preemergent herbicides used in the United States are applied to row crops over a 12-state area, called the "corn belt" (I). The application of these compounds may cause widespread degradation of water quality (2). Because herbicides are water soluble, there is the potential for leaching into groundwater and surface water (3, 4), as well as aerial...
Authors
E.M. Thurman, D. A. Goolsby, M. T. Meyer, D.W. Kolpin
Rivulus immaculatus, a new killifish from Venezuela (Cyprinodontiformes, Rivulidae) Rivulus immaculatus, a new killifish from Venezuela (Cyprinodontiformes, Rivulidae)
Abstract not supplied at this time
Authors
J.E. Thomerson, L.G. Nico, D.C. Taphorn
Fishes of the night. Part 1. The electric eel Fishes of the night. Part 1. The electric eel
Abstract not supplied at this time
Authors
L.G. Nico
Occurrence of a South American Armored Catfish in the Hillsborough River, Florida Occurrence of a South American Armored Catfish in the Hillsborough River, Florida
Abstract not supplied at this time
Authors
M.E. Ludlow, S. J. Walsh
Evaluation of a mark-recapture method for estimating mortality and migration rates of stratified populations Evaluation of a mark-recapture method for estimating mortality and migration rates of stratified populations
We simulated mark–recapture experiments to evaluate a method for estimating fishing mortality and migration rates of populations stratified at release and recovery. When fish released in two or more strata were recovered from different recapture strata in nearly the same proportions, conditional recapture probabilities were estimated outside the [0, 1] interval. The maximum likelihood...
Authors
R.M. Dorazio, P.J. Rago
Tumor frequencies in walleye (Stizostedion vitreum) and brown bullhead (Ictalurus nebulosus) and sediment contaminants in tributaries of the Laurentian Great Lakes Tumor frequencies in walleye (Stizostedion vitreum) and brown bullhead (Ictalurus nebulosus) and sediment contaminants in tributaries of the Laurentian Great Lakes
To better characterize neoplasm epizootics in the Great Lakes basin and their association with families of contaminants, we sampled five locations: the Fox and Menominee rivers, Lake Michigan; Munuscong Lake, St. Mary's River; and the Black and Cuyahoga rivers, Lake Erie. Frequencies of external and liver tumors were determined for brown bullhead (Ictalurus nebulosus) from all locations...
Authors
Paul C. Baumann, Michael J. Mac, Stephen B. Smith, John C. Harshbarger
Complex interactions among light-reducing variables in seagrass systems: Simulation model predictions for long-term community stability Complex interactions among light-reducing variables in seagrass systems: Simulation model predictions for long-term community stability
No abstract available.
Authors
Hilary A. Neckles
Coastal mapping programs at the U.S. Fish and Wildlife Service's National Wetlands Research Center Coastal mapping programs at the U.S. Fish and Wildlife Service's National Wetlands Research Center
Over the past 10 years, the U.S. Fish and Wildlife Service's (FWS) National Wetlands Research Center (center; formerly the National Coastal Ecosystems Team) has been continuously involved in the production of maps for use by coastal decision makers. The types of maps produced by the center have been national, regional, or local in scope depending on user needs. Map scales have ranged...
Authors
James B. Johnston, Lawrence R. Handley
Food habits of wintering canvasbacks in Louisiana Food habits of wintering canvasbacks in Louisiana
We studied the food habits of canvasbacks (Aythya valisineria) at Catahoula Lake (inland) and the Mississippi River Delta (coastal), Louisiana, from November 1987 to February 1988. Plant foods comprised >97 aggregate percent dry mass of the canvasback diet. The proportion of plant material eaten did not vary with sex, age, or month, or differ between study sites or nocturnal and diurnal
Authors
William L. Hohman, Dennis W. Woolington, J.H. Devries
Diurnal time-activity budgets of wintering canvasbacks in Louisiana Diurnal time-activity budgets of wintering canvasbacks in Louisiana
We determined diurnal time-activity budgets of Canvasbacks (Aythya valisineria) at Catahoula Lake and at the Mississippi River Delta, Louisiana, from December 1987 to March 1988. Canvasback feeding, resting, locomotory, and comfort activities varied by month and location with a month-location interaction. Moreover, the percentage of time spent feeding varied by sex with a month-sex...
Authors
William L. Hohman, D.P. Rave
Wetland and wildlife management in the Gulf of Mexico region Wetland and wildlife management in the Gulf of Mexico region
No abstract available.
Authors
James B. Johnston