Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
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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
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
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
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
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
Identification of isopropylbiphenyl, alkyl diphenylmethanes, diisopropylnaphthalene, linear alkyl benzenes and other polychlorinated biphenyl replacement compounds in effluents, sediments and fish in the Fox River System, Wisconsin Identification of isopropylbiphenyl, alkyl diphenylmethanes, diisopropylnaphthalene, linear alkyl benzenes and other polychlorinated biphenyl replacement compounds in effluents, sediments and fish in the Fox River System, Wisconsin
Five polychlorinated biphenyl replacement dye solvents and a diluent present in carbonless copy paper were identified by gas chromatography/mass spectrometry in the following matrices: effluents from a de-inking–recycling paper mill and a municipal wastewater treatment plant receiving wastewaters from a carbonless copy paper manufacturing plant; sediments; and fish collected near both...
Authors
Paul H. Peterman, Joseph J. Delfino
Comparative toxicity of inorganic contaminants released by placer mining to early life stages of salmonids Comparative toxicity of inorganic contaminants released by placer mining to early life stages of salmonids
The acute toxicities of four trace inorganics associated with placer mining were determined, individually and in environmentally relevant mixtures, to early life stages of Arctic grayling (Thymallus arcticus) from Alaska and Montana, coho salmon (Oncorhynchus kitsutch) from Alaska and Washington, and rainbow trout (Oncorhynchus mykiss) from Montana. The descending rank order of toxicity...
Authors
Kevin J. Buhl, Steven J. Hamilton
Establishment of bottomland oak plantations on the Yazoo National Wildlife Refuge complex Establishment of bottomland oak plantations on the Yazoo National Wildlife Refuge complex
Stocking, height and diameter growth, and invasion of both herbaceous and woody plant species are reported for 5 direct seeded and 5 planted seedling stands of bottomland oaks, all of which were between 4 and 8 years old. Stocking was generally higher in the planted seedling stands. Both height and diameter growth were substantially higher in the planted seedling stands. Low stocking and...
Authors
J. A. Allen