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: 1934
First flowering dates and flowering periods of prairie plants at Woodworth, North Dakota First flowering dates and flowering periods of prairie plants at Woodworth, North Dakota
We recorded flowering events for 97 species of prairie plants for 2-6 years near Woodworth, ND. Earliest and latest flower initiation dates varied by year. Temperature seemed much more important than precipitation in influencing phenology of species that bloom from late March through May, but no strong climatic effect was evident for plants that bloom later in the growing season.
Authors
J.M. Callow, H.A. Kantrud, K.F. Higgins
Population dynamics of breeding waterfowl Population dynamics of breeding waterfowl
No abstract available.
Authors
Douglas H. Johnson, J.D. Nichols, M.D. Schwartz
Foraging ecology and nutrition Foraging ecology and nutrition
No abstract available.
Authors
Gary L. Krapu, K. J. Reinecke
Effects of irrigation on seed production and vegetative characteristics of four moist-soil plants on impounded wetlands in California Effects of irrigation on seed production and vegetative characteristics of four moist-soil plants on impounded wetlands in California
We examined the effects of irrigation on 4 moist-soil plants commonly managed for waterfowl in the Sacramento Valley, California. Irrigation resulted in taller and heavier swamp timothy (Heleochloa schoenoides), pricklegrass (Crypsis niliaca), and sprangletop (Leptochloa fasicularis). Barnyardgrass (Echinochloa crusgalli) grew taller in irrigated wetlands, but no significant difference...
Authors
D.M. Mushet, N.H. Euliss, S.W. Harris
Nesting waterfowl and water birds on natural islands in the Dakotas and Montana Nesting waterfowl and water birds on natural islands in the Dakotas and Montana
No abstract available.
Authors
John T. Lokemoen, Robert O. Woodward
Survival and other observations of adult female northern pintails molting in California Survival and other observations of adult female northern pintails molting in California
Survival rates of nine adult female Northern Pintails (Anas acuta) that became flightless after being radio-marked in the Sacramento Valley, California in August 1987-1989 were estimated. Seven of the radio-marked pintails molted in the Sacramento Valley, a nontraditional molting region, and two flew 280 km north to the Klamath Basin to molt. Molting marshes were dominated by emergent...
Authors
M. R. Miller, J. P. Fleskes, D.L. Orthmeyer, D.S. Gilmer
Influence of age and selected environmental factors on reproductive performance of canvasbacks Influence of age and selected environmental factors on reproductive performance of canvasbacks
Age, productivity, and other factors affecting breeding performance of canvasbacks (Aythya valisineria) are poorly understood. Consequently, we tested whether reproductive performance of female canvasbacks varied with age and selected environmental factors in southwestern Manitoba from 1974 to 1980. Neither clutch size, nest parasitism, nest success, nor the number of ducklings/brood...
Authors
Jerome R. Serie, David L. Trauger, Jane E. Austin
An evaluation of regression methods to estimate nutritional condition of canvasbacks and other water birds An evaluation of regression methods to estimate nutritional condition of canvasbacks and other water birds
Regression equations that use mensural data to estimate body condition have been developed for several water birds. These equations often have been based on data that represent different sexes, age classes, or seasons, without being adequately tested for intergroup differences. We used proximate carcass analysis of 538 adult and juvenile canvasbacks (Aythya valisineria ) collected during...
Authors
D. W. Sparling, J.A. Barzen, J.R. Lovvorn, J.R. Serie
A stochastic population model of mid-continental mallards A stochastic population model of mid-continental mallards
We developed a simulation model that integrates infonnation on factors affecting the population dynamics of mallards in the mid-continental region of the United States. In the model we vary age, body mass, and reproductive and molt status of simulated females. Females use several types of nesting and foraging habitat in 15 geographic areas. Deterministic and stochastic events cause...
Authors
Rolf R. Koford, J.R. Sauer, Douglas H. Johnson, J.D. Nichols, M.D. Samuel
Northern Prairie Wildlife Research Center. A focus for waterfowl research Northern Prairie Wildlife Research Center. A focus for waterfowl research
Abstract has not been submitted
Authors
R.E. Kirby, D.S. Gilmer
Waterfowl production on the Woodworth Station in south-central North Dakota, 1965-1981 Waterfowl production on the Woodworth Station in south-central North Dakota, 1965-1981
During 17 years of study at the Woodworth, North Dakota study area, the percent of 548 wetland basin with water during 1-15 May ranged from 8 to 87 and averaged 56; waterfowl pair densities varied from 19 to 56/km2 and averaged 40/km2. Pond occupancy by duck pairs averaged 37% during mid-May counts and 48% for late May and early June counts. A positive linear relation occurred between...
Authors
K.F. Higgins, L.M. Kirsch, A.T. Klett, H.W. Miller
Record of a redhead, Aythya americana, laying eggs in a northern harrier, Circus cyaneus, nest Record of a redhead, Aythya americana, laying eggs in a northern harrier, Circus cyaneus, nest
An active Northern Harrier, Circus cyaneus, nest containing Redhead, Aythya americana, eggs, found in an Alberta wetland, apparently represents the first record of a Redhead parasitizing a harrier.
Authors
J. P. Fleskes