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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

Crane River Crane River

Abstract has not been submitted
Authors
Gary L. Krapu, J. Eldridge

Inheritance patterns of enzymes and serum proteins of mallard-black duck hybrids Inheritance patterns of enzymes and serum proteins of mallard-black duck hybrids

From 1974 to 1976, a breeding program was used to produce hybrids of black ducks and mallards for the evaluation of inheritance patterns of serum proteins and serum, liver and muscle enzymes. In addition to the crosses designed to produce hybrids, a series of matings in 1975 and 1976 were designed to evaluate inheritance patterns of a hybrid with either a black duck or mallard. At the F1...
Authors
R.P. Morgan, D. W. Meritt, S. B. Block, M.A. Cole, S. T. Sulkin, F.B. Lee, Charles J. Henny

Proper expression of metabolizable energy in avian energetics Proper expression of metabolizable energy in avian energetics

We review metabolizable energy (ME) concepts and present evidence suggesting that the form of ME used for analyses of avian energetics can affect interpretation of results. Apparent ME (AME) is the most widely used measure of food energy available to birds. True ME(TME) differs from AME in recognizing fecal and urinary energy of nonfood origin as metabolized energy. Only AME values...
Authors
M. R. Miller, K. J. Reinecke

Aquatic habitats--waterfowl Aquatic habitats--waterfowl

No abstract available.
Authors
J. T. Lokemoen, F.B. Lee, Harold F. Duebbert, G.A. Swanson

Effects of weather on habitat selection and behavior of mallards wintering in Nebraska Effects of weather on habitat selection and behavior of mallards wintering in Nebraska

Sex and age ratios, habitat selection, spatial characteristics, and time budgets of Mallards (Anas platyrhynchos) wintering on the Platte River in south central Nebraska were studied from mid-December to early April 1978-1980. The proportion of females and subadults in the population increased substantially from a cold to a mild winter. Radio-tagged Mallards shifted from riverine to...
Authors
Dennis G. Jorde, Gary L. Krapu, R.D. Crawford, M.A. Hay
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