Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9969
Regional West Indian manatee 1992 Studbook
Abstract not supplied at this time
Authors
C.L. Salisbury, C.A. Beck
Nomenclatural changes and additions
Abstract not supplied at this time
Authors
Eugenia B. Bohlke, W. F. Smith-Vaniz
Atrazine degradation in a small stream in Iowa
A study was conducted during 1990 through an 11.2-km reach of Roberts Creek in northeastern Iowa to determine the fate of atrazine in a surface water environment Water samples were collected at ~1-month intervals from April through November during stable low to medium flow conditions and analyzed for atrazine and two of its initial biotic degradation products, desethylatrazine and deisopropylatraz
Authors
D.W. Kolpin, S. J. Kalkhoff
Scour at a bridge over the Weldon River, Iowa
Contraction scour at the State Highway 2 bridge over the Weldon River in south-central Iowa was caused by a flood of record proportions on September 14 and 15, 1992. The peak discharge was 1, 930 cubic meters per second,which was 4 times the probable 100-year flood used to design the bridge, and resulted in road overflow. Contraction scour exposed the pier footings, but a subsurface layer of glaci
Authors
Edward E. Fischer
Caspian tern reproduction in the Saginaw Bay ecosystem following a 100-year flood event
In the 2 years that followed the 100-year flood incident of September 1986 in the Saginaw River/Bay ecosystem, the reproduction of Caspian terns collapsed and then slowly recovered. Egg viability and fledging rates of hatched chicks were drastically depressed in 1987 and 1988. Eggs from clutches laid later in the year were less viable and chicks hatched from these eggs displayed wasting syndromes
Authors
James P. Ludwig, Heidi J. Auman, Hiroko Kurita, Matthew E. Ludwig, Loraine M. Campbell, John P. Giesy, Donald E. Tillitt, Paul Jones, Nobu Yamashita, Shinsuke Tanabe, Ryo Tatsukawa
Biomonitoring of lead-contaminated Missouri streams with an assay for erythrocyte δ-aminolevulinic acid dehydratase activity in fish blood
The activity of the enzyme δ-aminolevulinic acid dehydratase (ALA-D) in erythrocytes has long been used as a biomarker of lead exposure in humans and waterfowl and, more recently, in fishes. The assay was tested for ALA-D activity in fishes from streams affected by lead in combination with other metals from lead-zinc mining and related activities. Fishes (mostly catostomids) were collected from si
Authors
C.J. Schmitt, M. L. Wildhaber, J. B. Hunn, T. Nash, M. N. Tieger, B. L. Steadman
Biomagnification of bioassay derived 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents
In recent years contamination of the Great Lakes ecosystem with planar chlorinated hydrocarbons (PCHs) has attracted considerable concern due to their known reproductive and teratogenic effects. The H4IIE bioassay has been standardized as a means of measuring the biological potency of a PCH mixture as 2,3,7,8-tetrachloro-p-dibenzodioxin equivalents (TCDD-EQ). Using this bioassay we have investigat
Authors
P. D. Jones, G.T. Ankley, D. A. Best, R. Crawford, N. DeGalan, J. P. Giesy, T.J. Kubiak, J. P. Ludwig, J.L. Newsted, D. E. Tillitt, D. A. Verbrugge
Behavioral methods for assessing impacts of contaminants on early life stage fishes
No abstract available.
Authors
E. E. Little, J.F. Fairchild, A. J. DeLonay
Activated mutatox assay for detection of genotoxic substances
No abstract available.
Authors
B. Thomas Johnson
Acute toxicity of the herbicide bromoxynil to Daphnia magna
The acute toxicities of technical-grade bromoxynil octanoate (BO) and two commercial formulations, Buctril® and Bronate®, to < 24-h-old neonate Daphnia magna (Straus) were determined in soft, hard, and oligosaline water. In addition, effects of life stage, feeding, aging the herbicide, and exposure duration on BO toxicity to daphnids were investigated. Regardless of formulation, life stage, and wa
Authors
Kevin J. Buhl, Steven J. Hamilton, James C. Schmulbach
2,3,7,8-Tetrachlorodibenzo-p-dioxin equivalents in tissues of birds at Green Bay, Wisconsin, USA
The environment has become contaminated with complex mixtures of planar, chlorinated hydrocarbons (PCHs) such as polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and structurally similar compounds. Because the potencies of individual congeners to cause the same adverse effects vary greatly and the relative as well as absolute concen
Authors
Paul D. Jones, John P. Giesy, John L. Newsted, David A. Verbrugge, Donald L. Beaver, Gerald T. Ankley, Donald E. Tillitt, Keith B. Lodge, Gerald J. Niemi