Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5657
Rejoinder to "The performance of mixture models in heterogeneous closed population capture-recapture" Rejoinder to "The performance of mixture models in heterogeneous closed population capture-recapture"
No abstract available.
Authors
Robert Dorazio, J. Andrew Royle
Thiamine status in adult salmonines in the Great Lakes Thiamine status in adult salmonines in the Great Lakes
In 1996 and again in 1999, hatchery personnel noted that some Lake Michigan coho salmon Oncorhynchus kisutch from fall spawning runs on the Platte River weir exhibited abnormal wiggling behavior that was similar to the behavior exhibited by thiamine-deficient Atlantic salmon Salmo salar, from the Baltic Sea. Samples of eggs or gonads, muscle, and liver from salmon and lake trout...
Authors
S.B. Brown, D. C. Honeyfield, J.G. Hnath, M. Wolgamood, S.V. Marcquenski, J.D. Fitzsimons, D. E. Tillitt
Use of sediment quality guidelines Use of sediment quality guidelines
Are sediment quality guidelines (SQGs) adequately able to predict the presence or absence of chronic toxicity to sediment-dwelling organisms in field-collected sediments? Can SQGs predict effects resulting from the bioaccumulation of sediment-associated contaminants? Do SQGs define cause-and-effect relationships? Can they predict effects on organisms exposed in the field on the basis of...
Authors
R. J. Wenning, G. E. Batley, Christopher G. Ingersoll, David W. Moore
Implications of thiamine deficiency in Great Lakes salmonines Implications of thiamine deficiency in Great Lakes salmonines
Our recent experimental work and ecoepizootiological assessments provide mechanistic data supporting a plausible hypothesis for an association between a prey base comprised of a large biomass of nonnative alewives Alosa pseudoharengus and the recruitment difficulties currently experienced by Great Lakes salmonines. We hypothesize that the thiamine deficiency induced by alewives, a...
Authors
Scott B. Brown, John D. Fitzsimons, Dale C. Honeyfield, Donald E. Tillitt
Metamorphosis of two amphibian species after chronic cadmium exposure in outdoor aquatic mesocosms Metamorphosis of two amphibian species after chronic cadmium exposure in outdoor aquatic mesocosms
Amphibian larvae at contaminated sites may experience an alteration of metamorphic traits and survival compared to amphibians in uncontaminated conditions. Effects of chronic cadmium (Cd) exposure on the metamorphosis of American toads (Bufo americanus) and southern leopard frogs (Rana sphenocephala) were determined. The two species were reared separately from shortly after hatching...
Authors
S.M. James, E. E. Little, R. D. Semlitsch
A method for measuring total thiaminase activity in fish tissues A method for measuring total thiaminase activity in fish tissues
An accurate, quantitative, and rapid method for the measurement of thiaminase activity in fish samples is required to provide sufficient information to characterize the role of dietary thiaminase in the onset of thiamine deficiency in Great Lakes salmonines. A radiometric method that uses 14C-thiamine was optimized for substrate and co-substrate (nicotinic acid) concentrations...
Authors
James L. Zajicek, Donald E. Tillitt, Dale C. Honeyfield, Scott B. Brown, John D. Fitzsimons
Amphibian ecotoxicology Amphibian ecotoxicology
No abstract available.
Authors
R. D. Semlitsch, C.M. Bridges
Selenium impacts on razorback sucker, Colorado: Colorado River: III. Larvae Selenium impacts on razorback sucker, Colorado: Colorado River: III. Larvae
Razorback sucker (Xyrauchen texanus) larvae from adults exposed to selenium at three sites near Grand Junction, Colorado, for 9 months were used in a 30-day waterborne and dietary selenium study. Selenium concentrations in water averaged
Authors
Steven J. Hamilton, Kathy M. Holley, Kevin J. Buhl, Fern A. Bullard
Implications of global climatic change and energy cost and availability for the restoration of the Mississippi delta Implications of global climatic change and energy cost and availability for the restoration of the Mississippi delta
Over the past several thousand years, inputs from the Mississippi River formed the Mississippi delta, an area of about 25,000 km2. Over the past century, however, there has been a high loss of coastal wetlands of about 4800 km2. The main causes of this loss are the near complete isolation of the river from the delta, mostly due to the construction of flood control levees, and pervasive
Authors
John W. Day
Depicting coastal Louisiana land loss Depicting coastal Louisiana land loss
The Coastal Louisiana Land Loss map depicts historical (1932-2000) changes of land to water and water to land, as well as projected changes (2000-2050). Projections are based on the assumption of no future restoration.
Authors
Gregory J. Smith
Dilemma of the common species: Florida Box Turtles Dilemma of the common species: Florida Box Turtles
Abstract not supplied at this time
Authors
C.K. Dodd