Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
Influence of dietary protein and excess methionine on choline needs for young bobwhite quail
Experiments were conducted with young Bobwhite quail (Colinus virginianus) to investigate the effect of differing dietary protein levels and nondetrimental amounts of excess methionine on choline needs. Growth and feed consumption of quail fed an adequate (27.3%) protein purified diet supplemented with 2000 mg/kg of choline were unaffected by increasing the level of excess methionine to 1.75%; how
Authors
J.A. Serafin
Hormonal responses and tolerance to cold of female quail following parathion ingestion
Thirty-week-old female bobwhite quail (Colinus virginianus), maintained at 26 + 1?C, were provided diets containing 0,25, or 100 ppm parathion ad libitum. After 10 days, birds were exposed to mild cold (6 + 1?C) for 4,8, 12, 24, or 48 hr. Brain acetylcholinesterase activity was inhibited in a dose-dependent manner in birds receiving 25 and 100 ppm parathion. Body weight, egg production, and pla
Authors
Barnett A. Rattner, L. Sileo, C.G. Scanes
Influence of protein level and supplemental methionine in practical rations for young endangered masked bobwhite quail
A study was conducted to examine the protein requirement of young endangered masked Bobwhite quail (Colinus virginianus ridgwayi). Five practical starting rations containing 24 to 32% protein were fed alone and supplemented with methionine for 5 weeks. Supplemental methionine significantly improved growth of quail fed diets containing 24 and 26% protein. Increasing the protein level improved gr
Authors
J.A. Serafin
Marine birds of the southwestern United States and Gulf of Mexico. Part II, Anseriformes
No abstract available.
Authors
R. B. Clapp, D. Morgan-Jacobs, R.C. Banks
Marine birds of the southwestern United States and Gulf of Mexico. Part 1, Gaviiformes through Pelecaniformes
No abstract available.
Authors
R. B. Clapp, R.C. Banks, D. Morgan-Jacobs, W.A. Hoffman
Wolf depredation on livestock in Minnesota
Depredation by wolves (Canis lupus) on cattle, sheep, and other livestock in Minnesota currently is a minor problem except to a few individual farmers. Indices to the seriousness of the problem are available only from recent years, so historical trends cannot be detected. From 1976 through 1980 the number of farms in the wolf range suffering verified losses to wolves ranged from 9 to 19 (mean of x
Authors
S. H. Fritts
Population ecology of the mallard: VII. Distribution and derivation of the harvest
This is the seventh in a series of comprehensive reports on population ecology of the mallard (Anas platyrhynchos) in North America. Banding records for 1961-1975 were used, together with information from previous reports in this series, to estimate annual and average preseason age and sex structure of the mallard population and patterns of harvest distribution and derivation. Age ratios in the
Authors
Robert E. Munro, Charles F. Kimball
Potential Impacts of Winter Navigation on Migratory Birds of the Upper U.S. Great Lakes
No abstract available.
Authors
T.E. Davis, R.M. Erwin
Distribution and Abundance of Waterfowl and Submerged Aquatic Vegetation in Chesapeake Bay
No abstract available.
Authors
R. E. Munro, M. C. Perry
Methods to evaluate habitat use by raptors
No abstract available.
Authors
M.R. Fuller, B.R. Noon, J. A. Mosher
Maryland and DC Breeding Bird Atlas Project Handbook, 1983-1987
No abstract available.
Authors
D. Bystrak, J. Cullom, K. Klimkiewicz, R. Ringler, C.S. Robbins, G. Taylor