Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16783
Nesting ecology of roseate spoonbills at Nueces Bay, Texas
We conducted a 3-year study in 1978-80 of thenesting ecology of Roseate Spoonbills (Ajaia ajaja) at Nueces Bay, Texas. Reproductive success, as well as nesting chronology, nest composition and placement, growth and development of young, egg measurements, and pollutant residues in eggs were determined. For 154 marked nests, the average clutch size was 3.0 eggs; 73% of the eggs hatched, and 87% of
Authors
D. H. White, C. A. Mitchell
Organophosphate insecticide poisoning of Canada geese in the Texas panhandle
Sixteen hundred waterfowl, mostly Canada Geese, died near Etter, Texas, in late January 1981 from anticholinesterase poisoning. Winter wheat in the area of the die-off had been treated with organophosphate insecticides to control greenbugs. Cholinesterase (ChE) levels in brains of a sample of geese found dead were 75% below normal, enough to account for death (Ludke et al. 1975). The gastrointes
Authors
D. H. White, C. A. Mitchell, L.D. Wynn, Edward L. Flickinger, E. J. Kolbe
Longevity records of North American birds: Gaviidae through Alcidae
No abstract available.
Authors
R. B. Clapp, M. K. Klimkiewicz, J.H. Kennard
Care of nestlings by wild female starlings exposed to an organophosphate pesticide
(1) Our objective was to determine the effect of exposure to an organophosphate pesticide (OP), dicrotophos (3-hydroxy-N,N-dimethyl-cis-scrotonamide dimethyl phosphate), on care of nestlings by wild female starlings (Sturnus vulgaris).(2) We selected twelve pairs of active nests based on synchrony in the reproductive cycle. When nestlings were 10 days old (day 10), adult males were captured and ki
Authors
C. E. Grue, G. V. N. Powell, M.J. McChesney
Trends in woodcock habitat and singing-ground counts in the eastern United States
No abstract available.
Authors
T.J. Dwyer, D.G. McAuley, E.L. Derleth
Breeding-ground habitat conditions and the survival of mallards
The relationship between habitat conditions in prairie breeding areas of North America and mallard (Anas platyrhynchos) survival rates was investigated. Annual survival-rate estimates for mallards generally were higher during years of high May pond numbers and low mallards-per-pond ratios than during years of low pond numbers and high ratios. This tendency was most pronounced among males. These
Authors
J. D. Nichols, R.S. Pospahala, J. E. Hines
Distribution and food habits of canvasbacks in the Northeast
No abstract available.
Authors
M. C. Perry
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