Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
Distribution patterns during winter and fidelity to wintering areas of American black ducks
The distribution patterns during winter of American black ducks (Anas rubripes) were compared among age – sex classes using band recovery data. In addition, fidelity to wintering areas was compared between sexes and between coastal and inland wintering sites. We did not find evidence of age- or sex-specific differences in distribution patterns (P > 0.10). Black ducks exhibited a stronger fidelity
Authors
Duane R. Diefenbach, James D. Nichols, James E. Hines
Industrial-strength herons: The black-crowns of Baltimore
No abstract available.
Authors
R.M. Erwin, J. S. Hatfield, W. A. Link
Waterbird use of high saltmarsh ponds created for open marsh water management (mosquito control)
The excavation of small (1 ha) natural ponds or pannes or adjacent tidal creeks. Recent modifications in pond construction in Delaware and New Jersey allow for shallower, more sloping basins which should enhance use by waterfowl and shorebirds while still ensuring a water reservoir to support fish populations.
Authors
R.M. Erwin, M.A. Howe, D.K. Dawson
Variance estimation for the Federal Waterfowl Harvest Surveys
The Federal Waterfowl Harvest Surveys provide estimates of waterfowl harvest by species for flyways and states, harvests of most other migratory game bird species (by waterfowl hunters), crippling losses for ducks, geese, and coots, days hunted, and bag per hunter. The Waterfowl Hunter Questionnaire Survey separately estimates the harvest of ducks and geese using cluster samples of hunters who bu
Authors
P.H. Geissler
Multivariate curve-fitting in GAUSS
Multivariate curve-fitting techniques for repeated measures have been developed and an interactive program has been written in GAUSS. The program implements not only the one-factor design described in Morrison (1967) but also includes pairwise comparisons of curves and rates, a two-factor design, and other options. Strategies for selecting the appropriate degree for the polynomial are provided.
Authors
C. M. Bunck, G.W. Pendleton
Mate desertion in the snail kite
Mate desertion during the breeding cycle was documented at 28 of 36 (78%) snail kite, Rostrhamus sociabilis nests in Florida between 1979 and 1983. Offspring mortality occurred at only one deserted nest, however. Parents that were deserted by their mates continued to care for their young until independence (3?5 additional weeks) and provided snails at a rate similar to that of both parents combin
Authors
S. R. Beissinger, N.F.R. Snyder
Conservation of Hawaii's vanishing avifauna
No abstract available.
Authors
J. M. Scott, C.B. Kepler, Charles van Riper, S.I. Fefer
[Book review] Helping and communal breeding in birds: ecology and evolution by Jerram L. Brown
No abstract available.
Authors
R. B. Clapp
Mortality and hematology associated with the ingestion of one number four lead shot in black ducks, Anas rubripes
No abstract available.
Authors
D.J. Pain, Barnett A. Rattner
Effects of monocrotophos and fenthion on discrimination acquisition and reversal in northern bobwhite (Colinus virginianus)
Adult male northern bobwhite (Colinus virginianus) were fed diets containing organo-phosphorus pesticides, and the birds' discrimination acquisition and reversal performance was evaluated. The birds received the pesticide-laced diets continually, beginning 2 d before behavioral testing and ending after the birds completed the test series consisting of an acquisition and 10 reversals. Bobwhites fed
Authors
J.F. Kreitzer, W. J. Fleming
Selenium toxicosis in wild aquatic birds
Severe gross and microscopic lesions and other changes were found in adult aquatic birds and in embryos from Kesterson Reservoir (a portion of Kesterson National Wildlife Refuge), Merced County, Calif., during 1984. Adult birds from that area were emaciated, had subacute to extensive chronic hepatic lesions, and had excess fluid and fibrin in the peritoneal cavity. Biochemical changes in their liv
Authors
H. M. Ohlendorf, A. W. Kilness, J. L. Simmons, R. K. Stroud, D. J. Hoffman, John F. Moore
Embryotoxic and teratogenic effects of selenium in the diet of mallards
Mallards (Anas platyrhynchos) were fed a control diet, diets containing 1, 5, 10, or 25 ppm Se as sodium selenite, or a diet containing 10 ppm Se as seleno-DL-methionine in the first of two experiments. Selenium at 10 ppm as selenomethionine or 25 ppm as sodium selenite caused a 40-44% decrease in the total number of eggs that hatched compared to controls. Selenium at 25 ppm (sodium selenite) resu
Authors
D. J. Hoffman, G. H. Heinz