Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41764
Duck plague: carrier state and gross pathology in black ducks
Duck plague (UP) is a highly fatal disease of ducks, geese, and swans (family Anatidae), produced by a reticulo-endotheliotrophic virus classified as a member of the Herpesvirus group. The disease was recognized in Europe in 1949. On the American continent, the disease was first diagnosed in the United States in 1967. Very little is known of DP virus ecology, particularly of the mechanisms of inte
Authors
Jorge E. Ossa
Production and management
No abstract available at this time
Authors
H. Dupree, J.W. Andrews, R. Reagan, R.O. Smitherman, D. Greenland
Enhancing bass production by the use of fish toxicants
Abstract not submitted to date
Authors
R.M. Burress
Eggshell thinning and residues in mallards one year after DDE exposure
A group of 16 mallard hens (Anas platyrhynchos), that had been given feed containing 40 ppm ofp,p'-DDE for 96 days, laid eggs with shells averaging about 15%–20% thinner than those of ten control birds during and up to 42 days after treatment. In eight of the treated birds killed at that time, whole-body DDE residues averaged 33.1 ppm (wet weight). The other eight treated birds and ten controls we
Authors
M. A. Haegele, Rick H. Hudson
Case report: Peregrine falcon suspected of pesticide poisoning
No abstract available.
Authors
W. L. Reichel, L. N. Locke, R. M. Prouty
Feeding Ecology of Breeding Blue-Winged Teals
A 5-year investigation of factors influencing the selection of foods consumed by blue-winged teals (Anas discors) during the breeding season in the glaciated prairie region of south-central North Dakota showed that birds first arriving on the breeding grounds consumed a diet consisting of 45 percent invertebrates. The proportion of animal foods in the diet increased to 95 percent at the onset of t
Authors
George A. Swanson, Mavis I. Meyer, Jerome R. Serie
Effects of low dietary levels of methyl mercury on mallard reproduction
Mallard ducks were fed a control diet or a diet containing 0.5 ppm or 3 ppm mercury (as methylmercury dicyandiamide). Health of adults and reproductive success were studied. The dietary level of 3 ppm mercury had harmful effects on reproduction, although it did not appear to affect the health of the adults during the 12 months of dosage. Ducks that were fed the diet containing 0.5 ppm mercury rep
Authors
G. Heinz
Organochlorine residues in brown pelican eggs: Relation to reproductive success
This study was conducted to determine the influence of residues of organochlorine pollutants on reproductive success in the brown pelican. A sample egg was taken from each of 93 marked nests in the nesting colony in South Carolina. Periodic visits were made to determine the fate of marked nests. Each sample egg was analysed for residues of organochlorine pollutants. Nest success in the brown pelic
Authors
L. J. Blus, B.S. Neely, A. A. Belisle, R. M. Prouty
Plasma enzyme activities in coturnix quail fed graded doses of DDE, polychlorinated biphenyl, malathion, and mercuric chloride
Male Coturnix quail (Coturnix coturnix japonica) were fed diets for 12 weeks containing graded levels of DDE, polychlorinated biphenyl (Aroclor 1254), malathion, and mercuric chloride. Birds were bled prior to exposure and at 2, 4 and 12 weeks, and the plasma used to measure the activities of creatine kinase, aspartate aminotransferase, cholinesterase, fructose-diphosphate aldolase, and lactate de
Authors
M. P. Dieter
Interaction of dieldrin and DDE residues in Japanese quail (Coturnix coturnix japonica)
No abstract available.
Authors
J. L. Ludke