Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
Organochlorine and mercury residues in Swainson's and ferruginous hawk eggs collected in North and South Dakota, 1974-79
Residues of organochlorine pesticides, polychlorinated biphenyls (PCBs), and mercury were measured in eggs of Swainson's hawks (Buteo swainsoni) and ferruginous hawks (B. regalis) collected in North and South Dakota during 1974–79. DDE was the most common compound detected in the eggs, but residues were below levels known to have adverse effects on reproduction. Other organochlorine compounds and
Authors
Rey C. Stendell, David S. Gilmer, Nancy A. Coon, Douglas M. Swineford
Bioaccumulation of selenium by snakes and frogs in the San Joaquin Valley, California
Livers of gopher snakes (Pituophis melanoleucus) from Kesterson Reservoir (Merced County, California) contained significantly higher mean selenium concentrations (11.1 .mu.g/g, dry weight) than those from two nearby reference sites (2.05 and 2.14 .mu.g/g). Livers of bullfrogs (Rana catesbeiana) collected from the San Luis Drain at Kersterson Reservoir also contained significantly higher mean selen
Authors
H. M. Ohlendorf, R. L. Hothem, T. W. Aldrich
Food habits and distribution of wintering canvasbacks, Aythya valisineria, on Chesapeake Bay
Baltic clams (Macoma balthica) were the predominant food items of 323 canvasbacks (Aythya valisineria) collected throughout Chesapeake Bay during 1970–1979. Natural vegetation constituted 4% of the food volume. Widgeongrass (Ruppia maritima) and redhead grass (Potamogeton perfoliatus) constituted the greatest percent volume and frequency of occurrence among the plant species, whereas wild celery (
Authors
M. C. Perry, F.M. Uhler
Birds and environmental contaminants in San Francisco and Chesapeake Bays
The direct and indirect effects of human activities, including environmental contamination, upon bird populations in San Francisco Bay and Chesapeake Bay are imperfectly understood, and few data are available. that allow a comparison of the contamination levels in birds from these two areas. Certain trace elements and organochlorine compounds have been found at sufficiently high concentrations in
Authors
H. M. Ohlendorf, W. J. Fleming
Comparative toxicity of lead shot in black ducks and mallards
An extreme sensitivity of pen-reared black ducks (BDs) to lead shot was observed incidental to development of an enzyme assay (Pain & Rattner, 1988). Intubation of pen-reared BDs with one no. 4 lead shot resulted in 60% mortality in 6 days. It was concluded that BDs were more sensitive to lead shot than expected, or that lead toxicity may be exacerbated by stressful conditions (elevated temperatu
Authors
Barnett A. Rattner, W. J. Fleming
An environmental risk assessment approach to wildlife research
No abstract available.
Authors
R.J. Hall, Barnett A. Rattner, M.R. Whitworth
The lost world of Venezuela. An African Connection
No abstract available.
Authors
V.A. Funk, R.W. McDiarmid
Karyotype of Marmosa canescens (Marsupialia: Didelphidae): a mouse opossum with 22 chromosomes
No abstract available.
Authors
M.D. Engstrom, A.L. Gardner
Geographic variation in the yellow-billed cuckoo
Populations of the Yellow-billed Cuckoo, Coocyzus americanus, west of the Rocky Mountains have average wing lengths slightly greater than those of eastern North America, but the difference is not sufficient for taxonomic recognition. There is no geographically oriented variation in bill size or color, and the species is best considered monotypic.
Authors
R.C. Banks
Population trends of the American woodcock, 1970-1987
No abstract available.
Authors
J.R. Sauer, J.B. Bortner