Publications
This is a list of publications written by Patuxent employees since Patuxent opened in 1939. To search for Patuxent's publications by author or title, please click below to go to the USGS Publication Warehouse.
Filter Total Items: 8128
Embryotoxic and teratogenic effects of selenium in the diet of mallards Embryotoxic and teratogenic effects of selenium in the diet of mallards
Mallards (Anas platyrhynchos) were fed a control diet, diets containing 1, 5, 10, or 25 ppm Se as sodium selenite, or a diet containing 10 ppm Se as seleno-DL-methionine in the first of two experiments. Selenium at 10 ppm as selenomethionine or 25 ppm as sodium selenite caused a 40-44% decrease in the total number of eggs that hatched compared to controls. Selenium at 25 ppm (sodium...
Authors
D. J. Hoffman, G. H. Heinz
Selenium toxicosis in wild aquatic birds Selenium toxicosis in wild aquatic birds
Severe gross and microscopic lesions and other changes were found in adult aquatic birds and in embryos from Kesterson Reservoir (a portion of Kesterson National Wildlife Refuge), Merced County, Calif., during 1984. Adult birds from that area were emaciated, had subacute to extensive chronic hepatic lesions, and had excess fluid and fibrin in the peritoneal cavity. Biochemical changes in...
Authors
H. M. Ohlendorf, A. W. Kilness, J. L. Simmons, R. K. Stroud, D. J. Hoffman, John F. Moore
Preliminary Report, Herpetology Collections of Cerro de la Neblina Preliminary Report, Herpetology Collections of Cerro de la Neblina
No abstract available.
Authors
R.W. McDiarmid, R. Cocroft, A. Paolillo
Bias of animal population trend estimates Bias of animal population trend estimates
A computer simulation study of the population trend estimator used for the Mourning Dove Call-Count Survey, Woodcock Singing Ground Survey, Breeding Bird Survey and other surveys concluded that the estimator had negligible bias in most situations but that observer covariables should not be used with less than five years of data. With rare species (e.g. two birds per route), at least five...
Authors
P.H. Geissler, W.A. Link
Distribution and numbers of American black ducks along the Maine coast during the severe winter of 1980-1981 Distribution and numbers of American black ducks along the Maine coast during the severe winter of 1980-1981
No abstract available.
Authors
J. R. Longcore, J.P. Gibbs
Some considerations in modeling the mallard life cycle Some considerations in modeling the mallard life cycle
We outline a population model proposed to accommodate the full life cycle of the mallard (Anas platyrhynchos}. Events during the breeding season are better understood than events at other times of the year, but recent findings suggest the importance of phenomena away from the breeding grounds. Several processes are discussed relative to mallard population dynamics. Compensatory mortality...
Authors
Douglas H. Johnson, J.D. Nichols, M.J. Conroy, L.M. Cowardin
Autumn migrations of peregrine falcons at Assateague Island, Maryland/Virginia, 1970-1984 Autumn migrations of peregrine falcons at Assateague Island, Maryland/Virginia, 1970-1984
No abstract available.
Authors
F.P. Ward, K. Titus, W.S. Seegar, M.A. Yates, M.R. Fuller
Workshop summary: Nutrition, condition, and ecophysiology Workshop summary: Nutrition, condition, and ecophysiology
No abstract available.
Authors
K. J. Reinecke, C.D. Ankney, Gary L. Krapu, R.B. Owen, H. H. Prince, D.G. Raveling
California condor, Gymnogyps californianus (Shaw) California condor, Gymnogyps californianus (Shaw)
No abstract available.
Authors
N.F.R. Snyder