Publications
Below is a list of WERC's peer-reviewed publications. If you are searching for a specific publication and cannot find it in this list, please contact werc_web@usgs.gov
Filter Total Items: 3609
Phenotypic variation of the Mexican duck (Anas platyrhynchos diazi) in Mexico
A collection of 98 breeding Mexican Ducks (Anas platyrhynchos diazi) was made in Mexico from six areas between the United States border with Chihuahua and Lake Chapala, Jalisco, in order to study geographic variation. Plumage indices showed a relatively smooth clinal change from north to south; northern populations were most influenced by the Northern Mallard (A. p. platyrhynchos) phenotype. Most
Authors
N. J. Scott, R.P. Reynolds
Golden Gate uses team approach on 'monumental' resource problems
No abstract available.
Authors
J. A. Howell
Comparative ability of northern pintails, gadwalls, and northern shovelers to metabolize foods
No abstract available.
Authors
M. R. Miller
Carbon assimilation characteristics of the aquatic CAM plant Isoetes howellii
No abstract available.
Authors
J. E. Keeley, G. Busch
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 obtained from
Authors
M. R. Miller, K. J. Reinecke
Hydrogen, oxygen and carbon isotope ratios of cellulose from submerged aquatic Crassulacean Acid Metabolism and non-Crassulacean Acid Metabolism plants
No abstract available.
Authors
L. Sternberg, M. J. DeNiro, J. E. Keeley
Breeding biology of Pacific white-fronted geese
Nesting ecology of Pacific white-fronted geese (Anser albifrons frontalis) was studied on a 9.9-km2 area on the Yukon-Kuskokwim (Y-K) Delta, Alaska, during 1977-79. Availability of nesting habitat varied considerably among years because of differences in time of snow- and icemelt. Mean clutch size was 3.7 eggs in the late spring thaw year and 5.2 and 5.7 eggs in early snowmelt years. Peak (and dur
Authors
Craig R. Ely, Dennis G. Raveling
Early behavioral development of the sea otter, Enhydra lutris
No abstract available.
Authors
S.F. Payne, R.J. Jameson
Summary of available population information on California sea otters
No abstract available at this time
Authors
J. A. Estes, R.J. Jameson
Light/dark control of diurnal acid metabolism in the submerged aquatic Isoetes howellii
No abstract available.
Authors
J. E. Keeley
Crassulacean acid metabolism in the seasonally submerged aquatic Isoetes howellii
No abstract available.
Authors
J. E. Keeley