Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
Reproductive success of black skimmers in Texas relative to environmental pollutants
We studied the nesting ecology of Black Skimmers along the lower Texas coast during 1978-1981 to learn more of their reproductive status and to evaluate the effects of organochlorine pollutants, such as DDE, on productivity. For 542 nests, the average clutch size was 3.3 eggs. Flooding was the major cause of colony destruction and abandonment. Clutch size in renest attempts decreased significant
Authors
D. H. White, C. A. Mitchell, D. M. Swineford
Sight record of band-rumped storm-petrel off the coast of Palm Beach County, Florida
No abstract available.
Authors
P.W. Sykes, H.P. Langridge, T. Trotsky
The eighty-fourth Audubon Christmas bird count. North Carolina, South Carolina, Georgia, Florida
No abstract available.
Authors
P.W. Sykes
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. platyrhynchos) phenotype. Measurem
Authors
N. J. Scott, R.P. Reynolds
Breeding biology of the blue-gray noddy
Blue-gray Noddies, the smallest marine terns, are similar in many respects to all tropical terns in Hawaii: single-egg clutches are laid, growth and development take about 7 weeks, breeding is colonial. Its small size results in eggs that comprise over 27% of adult body weight, compared to 15-20% for most marine terns (Langham 1983). Blue-gray Noddies are widespread in the tropical Pacific, but p
Authors
M.J. Rauson, S. Harrison, R. B. Clapp
Chromosome numbers and ecological observations of ferns from El Tirol, Paraguay
No abstract available.
Authors
A.R. Smith, M.S. Foster
Avian endocrine responses to environmental pollutants
Many environmental contaminants are hazardous to populations of wild birds. Chlorinated hydrocarbon pesticides and industrial pollutants are thought to be responsible for population declines of several species of predatory birds through eggshell thinning. Studies have demonstrated that these contaminants have estrogenic potency and may affect the functioning of the gonadal and thyroidal endocrine
Authors
Barnett A. Rattner, V.P. Eroschenko, G.A. Fox, D.M. Fry, J. Gorsline
Reproduction by an altricial songbird, the red-winged blackbird, in fields treated with the organophosphate insecticide fenthion
(1) Breeding red-winged blackbirds were used as a model to study the effects of a single application of an organophosphate insecticide, fenthion, on reproduction of altricial songbirds.(2) The insecticide had no significant effect on frequency of nest abandonment, clutch size, hatching success, or fledgling success.(3) Growth rates of young nestlings were lower in nests on one of two treated areas
Authors
G. V. N. Powell
Comparative toxicity of acephate in laboratory mice, white-footed mice, and meadow voles
The LD50 (95% confidence limits) of the organophosphorus insecticide acephate was estimated to be 351, 380, and 321 mg/kg (295–416, 280–516, and 266–388 mg/kg) for CD-1 laboratory mice (Mus musculus), white-footed mice (Peromyscus leucopus noveboracensis), and meadow voles (Microtus pennsylvanicus), respectively. In a second study, these species were provided mash containing 0, 25, 100, and 400 pp
Authors
Barnett A. Rattner, David J. Hoffman