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
Intermittent feeding in a migratory omnivore: Digestion and body composition of American Black Duck during autumn Intermittent feeding in a migratory omnivore: Digestion and body composition of American Black Duck during autumn
Birds fast intermittently during weather disturbances and migration. We tested responses of black duck to lost feeding days during autumn mass gain. Nine adult males were fed a pelleted diet (1.5% fat, 15.8% protein, and 18.3% neutral detergent fiber) and caged indoors during September and October (12 h light; 17°–24°C) to measure balances over 14 d when fed ad lib. each day and fasted
Authors
Perry S. Barboza, Dennis G. Jorde
Effects of pre- and postnatal polychlorinated biphenyl exposure on metabolic rate and thyroid hormones of white-footed mice Effects of pre- and postnatal polychlorinated biphenyl exposure on metabolic rate and thyroid hormones of white-footed mice
Energy budgets have proven to be a valuable tool for predicting life history from physiological data in terrestrial vertebrates, yet these concepts have not been applied to the physiological effects of contaminants. Contaminants might affect energy budgets by imposing an additional metabolic cost or by reducing the overall amount of energy taken in; either process will reduce the energy...
Authors
J.B. French, M.B. Voltura, T.E. Tomasi
Kirtland's warbler diet as determined through fecal analysis Kirtland's warbler diet as determined through fecal analysis
The endangered Kirtland's Warbler (Dendroica kirtlandii) nests primarily in large (>32 ha) stands of young (5- to 25-yr-old) jack pine (Pinus banksiana) which grow on Grayling sand soil. These specific habitat requirements restrict the Kirtland's Warbler breeding range to only 13-16 counties in the northern lower peninsula of Michigan. Although the nature of the species' affinity for...
Authors
Christie M. Deloria-Sheffield, Kelly F. Millenbah, Carol I. Bocetti, P.W. Sykes, C. B. Kepler
[Book review] Prairie Wetland Ecology: The Contribution of the Marsh Ecology Research Program edited by Henry R. Murkin, Arnold G. van der Valk and William R. Clark [Book review] Prairie Wetland Ecology: The Contribution of the Marsh Ecology Research Program edited by Henry R. Murkin, Arnold G. van der Valk and William R. Clark
No abstract available.
Authors
J. R. Longcore
Trail resource impacts and an examination of alternative assessment techniques Trail resource impacts and an examination of alternative assessment techniques
Trails are a primary recreation resource facility on which recreation activities are performed. They provide safe access to non-roaded areas, support recreational opportunities such as hiking, biking, and wildlife observation, and protect natural resources by concentrating visitor traffic on resistant treads. However, increasing recreational use, coupled with poorly designed and/or...
Authors
J. L. Marion, Y.-F. Leung
Maternal steroids and contaminants in common tern eggs: A mechanism of endocrine disruption? Maternal steroids and contaminants in common tern eggs: A mechanism of endocrine disruption?
We looked for evidence for the hypothesis that exposure of female birds to polychlorinated biphenyls (PCBs) results in alteration of blood steroid hormone concentrations and alters subsequent hormone transfer of steroids to eggs. Eggs of three-egg clutches were collected from a PCB-exposed common tern (Sterna hirundo) colony (Ram Island, Buzzards Bay, MA, USA) and from a relatively clean...
Authors
J.B. French, I.C.T. Nisbet, H. Schwabl
Stable-isotope analysis of canvasback winter diet in upper Chesapeake Bay Stable-isotope analysis of canvasback winter diet in upper Chesapeake Bay
A major decline in submerged aquatic vegetation (SAV) in Chesapeake Bay has altered the diet of wintering Canvasbacks (Aythya valisineria) from historically plant to a combination of benthic animal foods, especially the ubiquitous Baltic clam (Macoma balthica), supplemented with anthropogenic corn (Zea mays). Because the isotopic signature of corn is readily discriminated from bay...
Authors
G.M. Haramis, Dennis G. Jorde, S.A. Macko, J.L. Walker
Satellite tracking of two lesser spotted eagles, Aquila pomarina, migrating from Namibia Satellite tracking of two lesser spotted eagles, Aquila pomarina, migrating from Namibia
One immature and one subadult Lesser Spotted Eagle, Aquila pomarina, were followed by satellite telemetry from their non-breeding areas in Namibia. Both birds were fitted with transmitters (PTTs) in February 1994 and tracked, the immature for six months and three weeks, the subadult for eight months and two weeks, over distances of 10 084 and 16 773 km, respectively. During their time in...
Authors
B.-U. Meyburg, D. H. Ellis, C. Meyburg, J. Mendelsohn, W. Scheller
Ground-nesting waterbirds and mammalian carnivores in the Virginia barrier island region: Running out of options Ground-nesting waterbirds and mammalian carnivores in the Virginia barrier island region: Running out of options
We examined changing patterns of distribution of two large mammalian predators, the raccoon (Procyon lotor) and red fox (Vulpes vulpes), and beach-nesting terns and Black Skimmers (Rynchops niger) along ca. 80 km of the Virginia barrier island landscape between the periods 1975-1977 and 1998. Based on evidence from trapping, scent stations, den observations and sightings of the two...
Authors
R.M. Erwin, B.R. Truitt, J.E. Jimenez
Status and habitat relationships of northern flying squirrels on Mount Desert Island, Maine Status and habitat relationships of northern flying squirrels on Mount Desert Island, Maine
Northern (Glaucomys sabrinus) and southern (G. volans) flying squirrels occur in Maine, but there is uncertainty about range overlap in southcentral Maine where the southern flying squirrel reaches its geographic range limit. We surveyed flying squirrels on Mount Desert Island (MDI), located along the central Maine coast, to update the current status and distribution of these species. We
Authors
A.F. O’Connell, F. Servello, J. Higgins, W. Halteman