Publications
USGS Northern Prairie Wildlife Research Center staff publish results of their research in USGS series reports and in peer-reviewed journals. Publication links are below. Information on all USGS publications can be found at the USGS Publications Warehouse.
Filter Total Items: 1907
Incidence of black-phase plumage in ferruginous hawks nesting in central North Dakota
Abstract has not been submitted
Authors
P.M. Konrad, D.S. Gilmer
Size differences in migrant sandpiper flocks: ghosts in ephemeral guilds
Scolopacid sandpipers were studied from 1980 until 1984 during spring migration in North Dakota. Common species foraging together in mixed-species flocks differed in bill length most often by 20 to 30 percent (ratios from 1.2:1 to 1.3:1). Observed flocks were compared to computer generated flocks drawn from three source pools of Arctic-nesting sandpipers. The source pools included 51 migrant speci
Authors
J.L. Eldridge, D. H. Johnson
Kleptoparasitism by bald eagles wintering in south-central Nebraska
Kleptoparasitism on other raptors was one means by which Bald Eagles (Haliaeetus leucocephalus) secured food along the North Platte and Platte rivers during the winters of 1978-1980. Species kelptoparasitized were Ferruginous Hawk (Buteo regalis), Red-tailed Hawk (B. jamaicensis), Rough-legged Hawk (B. lagopus), Golden Eagle (Aquila chrysaetos), and Bald Eagle. Stealing of prey occurred more often
Authors
Dennis G. Jorde, G.R. Lingle
The influence of diet quality on clutch size and laying pattern in mallards
We measured the effect of diet quality on variation in the seasonal pattern of Mallard (Anas platyrhynchos) reproduction. Twenty wild-strain hens, consisting of 10 sibling pairs, were maintained in captivity. One sib of each pair was fed an enriched diet, and the other was fed wheat. The wheat diet resulted in reduced clutch size, egg size, laying rate, number of nesting attempts, and total eggs l
Authors
J.L. Eldridge, G.L. Krapu
Ingestion of lead shot and aluminum bands by bald eagles during winter in Nebraska
Abstract has not been submitted
Authors
G.R. Lingle, G.L. Krapu
Feeding ecology of canvasbacks staging on Pool 7 of the Upper Mississippi River
Foods consumed by canvasback ducks (Aythya valisineria), food availability, and energetic relationships were studied on Navigation Pool 7 of the upper Mississippi River in 1978, 1979, and 1980. Canvasbacks fed primarily upon winter buds of American wildcelery (Vallisneria americana) and tubers of stiff arrowhead (Sagittaria rigida). In 1980, waterfowl consumed 40% of 380,160 kg of wildcelery winte
Authors
C. E. Korschgen, L. S. George, W. L. Green
Workshop summary: feeding ecology
No abstract available.
Authors
C. E. Korschgen, F.A. Reid, J.R. Serie
Dabbling duck harvest dynamics in the Central Valley of California--implications for recruitment
Age and sex ratios and body weights were obtained for northern pintails (Anas acuta), mallards (A. platyrhynchos), American wigeon (A. americana), green-winged teal (A. crecca), and northern shovelers (A. clypeata) shot at Mendota State Wildlife Area in the San Joaquin Valley (SANJV) and at Sacramento National Wildlife Refuge in the Sacramento Valley (SACV) during 1982-83 and 1983-84. Age ratios w
Authors
M. R. Miller, J. Beam, D.P. Connelly
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 is a poor
Authors
D. H. Johnson, J. D. Nichols, M.J. Conroy, L.M. Cowardin
Workshop summary: Hunting vulnerability and mortality
No abstract available.
Authors
F. Montalbano, D. H. Johnson, M. R. Miller, D. H. Rusch
Workshop summary: nutrition, condition, and ecophysiology
No abstract available.
Authors
K. J. Reinecke, C.D. Ankney, G.L. Krapu, R. Owen
Applications of a simulation model to decisions in mallard management
A system comprising simulation models and data bases for habitat availability and nest success rates was used to predict results from a mallard (Anas platyrhynchos) management plan and to compare six management methods with a control. Individual treatments in the applications included land purchase for waterfowl production, wetland easement purchase, lease of uplands for waterfowl management, crop
Authors
L.M. Cowardin, D. H. Johnson, T.L. Shaffer, D. W. Sparling