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: 41918
Requirement for dietary choline by lake trout
No abstract available at this time
Authors
H. G. Ketola
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
The literature of the California black rail
Few birds have remained so little known as the California black rail (Laterallus jamaicensis coturniculus). Although first collected in 1859 or before and reported in 1874 (Ridgway 1874), its life history, distribution, and status have remained so obscure that even a sight record of the bird is deemed worthy of a report in some ornithological publications. Because degradation and loss of freshwate
Authors
Sanford R. Wilbur
Toxicity of formalin, malachite green, and the mixture to four life stages of rainbow trout
Formalin, malachite green, or a mixture of them are utilized in fish culture for control of external parasites of fish and control of fungus on fish and fish eggs. Very little information is available concerning the toxicity of these compounds to fish under laboratory test conditions or the differences in sensitivity to these chemicals at various life stages. This study was designed to 1) determin
Authors
Terry D. Bills, Charles F. Advised by: Hosler, Kenneth B. Cumming, Richard P. Nord, Robert E. Senff
Growth responses of Spartina patens and Spartina alterniflora by means of a two dimensional factorial design
Growth of Spartina patens and Spartina alterniflora was compared under identical greenhouse conditions. Mature plants were grown in quartz sand and watered with the following solutions: (1) full Hoagland's solution; (2) Hoagland's minus iron; (3) Hoagland's minus nitrogen; (4) Hoagland's with NaCl added to 28 o/oo; (5) sea water of 28 o/oo. S. patens showed improved growth in Hoagland's solution a
Authors
W. L. Halvorson, A. C. Singer