Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
Acute toxicity of diazinon is similar for eight stocks of bobwhite
Nine-week-old bobwhite (Colinus virginianus) from eight different game farms were tested for their sensitivity to an acute oral exposure of technical-grade diazinon (phosphorothioic acid O,O-diethyl-O-[6-methyl-2-(l-methylethyl) -4-pyrimidinyl]ester). Extraneous variables associated with interlaboratory differences in husbandry were eliminated by incubating eggs and rearing chicks to test age for
Authors
E. F. Hill, M.B. Camardese, G. H. Heinz, J. W. Spann, A.B. DeBevec
Subchronic mercury exposure in coturnix and a method of hazard evaluation
The sublethal toxicity of inorganic (HgCl2) and organic (CH3HgCl) mercury chloride was studied in coturnix (Coturnix japonica) by feeding them mercuric compounds (CH3HgCl at concentrations of 0.125,0.5,2 and 8 ppm; HgCl2 at 0.5, 2, 8 and 32 ppm) in ad libitum diets from hatching to adulthood. Differences of response to the mercurials were compared on the basis of selected indicator enzymes and pla
Authors
E. F. Hill, J. H. Soares
Avian models for toxicity testing
The use of birds as test models in experimental and environmental toxicology as related to health effects is reviewed, and an overview of descriptive tests routinely used in wildlife toxicology is provided. Toxicologic research on birds may be applicable to human health both directly by their use as models for mechanistic and descriptive studies and indirectly as monitors of environmental quality.
Authors
E. F. Hill, D. J. Hoffman
Neurotoxic and teratogenic effects of an organophosphorus insecticide (phenyl phosphonothioic acid-O-ethyl -O-[4-nitrophenyl] ester) on mallard development
Phenyl phosphonothioic acid-O-ethyl-O-[4-nitrophenyl] ester (EPN) is one of the 10 most frequently used organophosphorus insecticides and causes delayed neurotoxicity in adult chickens and mallards. Small amounts of organophosphorus insecticides placed on birds' eggs are embryotoxic and teratogenic. For this reason, the effects of topical egg application on EPN were examined on mallard (Anas platy
Authors
D. J. Hoffman, L. Sileo
Subchronic organophosphorus ester-induced delayed neurotoxicity in mallards
Eighteen-week-old mallard hens received 0, 10, 30, 90, or 270 ppm technical grade EPN (phenylphosphonothioic acid O-ethyl-O-4-nitrophenyl ester) in the diet for 90 days. Ataxia was first observed in the 270-ppm group after 16 days, in the 90-ppm group after 20 days, in the 30-ppm group after 38 days; 10 ppm failed to produce ataxia. By the end of 90 days all 6 birds in the 270-ppm group exhibited
Authors
D. J. Hoffman, L. Sileo, H. C. Murray
Special Report: Recent advances in the California condor research and recovery program
No abstract available.
Authors
R.B. Goodloe
[Part 1] A new species of Sarcoglottis (Orchidaceae) from Paraguay
No abstract available.
Authors
P. Burns-Balogh, M.S. Foster
[Part 2] A new species of Sarcoglottis (Orchidaceae) from Paraguay
No abstract available.
Authors
P. Burns-Balogh, M.S. Foster
First records of Juan Fernandes (Pterodroma e. externa) and Stejneger's (Pterodroma longirostris) petrels from Hawaii
No abstract available.
Authors
R. B. Clapp
Monitoring colonial waterbird populations in the Northeast: Historical and future perspectives
No abstract available.
Authors
R.M. Erwin
Testing for variation in taxonomic extinction probabilities: a suggested methodology and some results
Several important questions in evolutionary biology and paleobiology involve sources of variation in extinction rates. In all cases of which we are aware, extinction rates have been estimated from data in which the probability that an observation (e.g., a fossil taxon) will occur is related both to extinction rates and to what we term encounter probabilities. Any statistical method for analyzing f
Authors
M.J. Conroy, J. D. Nichols