Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16786
Toxicity of parathion to captive european starlings (Sturnus vulgaris) — Absence of seasonal effects
The effects of season on the toxicity of the prototypic organophosphorus insecticide parathion was evaluated using adult European starlings (Sturnus vulgaris) housed in outdoor pens. Groups of birds received oral doses of parathion in the fall, winter, spring and summer. Median lethal dosage, and brain and plasma cholinesterase inhibition, were found to be quite similar among seasons. Parathion ma
Authors
Barnett A. Rattner, C. E. Grue
Recent population trends of the eastern bluebird
North American Breeding Bird Survey data for the period 1966-1987 indicate that Eastern Bluebird (Sialia sialis) populations declined during the 1970s, primarily in association with either severe winters or severe spring storms. In recent years, bluebird populations have increased to levels similar to those observed during the first year (1966) of the survey. Survey results suggest that climate
Authors
J.R. Sauer, Sam Droege
Breeding biology and nesting success of palila
We studied the breeding biology of Palila (Loxioides bailleui ) at 85 nests from 20 April to 14 September 1988. Eggs were laid over a 139-day period and incubation averaged 16.6 days. The female incubated 85.2% of daylight hours and males fed incubating females. Modal clutch size was 2 (x super(-) = 2.0) and an average of 1.4 nestlings fledged per successful nest. Nestlings were in the nest an ave
Authors
S.M. Pletschet, J.F. Kelly
Recent trends in counts of migrant hawks from northeastern North America
Using simple regression, pooled-sites route-regression, and nonparametric rank-trend analyses, we evaluated trends in counts of hawks migrating past 6 eastern hawk lookouts from 1972 to 1987. The indexing variable was the total count for a season. Bald eagle (Haliaeetus leucocephalus), peregrine falcon (Falco peregrinus), merlin (F. columbarius), osprey (Pandion haliaetus), and Cooper's hawk (Acc
Authors
K. Titus, M.R. Fuller
Temporal and spatial variation in survival rates of the tropical lizard Anolis limifrons
We evaluated survival of the lizard, Anolis limifrons at two sites, AVA and Lutz, from 1976-1979 and during two periods at Lutz site, 1971-1976 vs 1976-1979, at Barro Colorado Island, Panama. Survival of adult females and males did not differ nor did survival of juveniles and adults. In contrast, survival was significantly higher at Lutz site during 1971-1976 than during 1976-1979 and survival wa
Authors
R.M. Andrews, J. D. Nichols
Evaluation of three miniature radio transmitter attachment methods for small passerines
Thirty-two immature common yellowthroats were used to evaluate three methods of attaching radio transmitters to the backs of small passerines: adhesive, velcro, and harness. There were no significant differences between the three methods; however, the adhesive method of transmitter attachment to small birds was found to be the preferred technique.
Authors
P.W. Sykes, J. W. Carpenter, S. Holzman, P.H. Geissler
Comparisons of patch-use models for wintering American tree sparrows
Optimal foraging theory has stimulated numerous theoretical and empirical studies of foraging behavior for >20 years. These models provide a valuable tool for studying the foraging behavior of an organism. As with any other tool, the models are most effective when properly used. For example, to obtain a robust test of a foraging model, Stephens and Krebs (1986) recommend experimental designs in wh
Authors
M.W. Tome
Breeding bird census: 34. Isolated oak-tuliptree-pine upland forest
No abstract available.
Authors
C.S. Robbins
Breeding bird census: 12. Isolated moist tuliptree-red maple upland forest
No abstract available.
Authors
C.S. Robbins
Lead hazards within the range of the California condor
The prevalence of lead in Golden Eagles (Aquila chrysaetos) occurring within the recent historical range of the California Condor (Gymnogyps californianus) was determined by analyzing blood samples from 162 Golden Eagles captured between June 1985 and December 1986 at three sites. We found no significant differences between sex and age classes in blood lead levels nor were there differences betwee
Authors
O. H. Pattee, P.H. Bloom, J. M. Scott, M. R. Smith
Comparative induction of cytochromes P450 by 3-methylcholanthrene (MC) and phenobarbital (PB) in mallard duck (MD) and in Fisher-344 rat (FR)
No abstract available.
Authors
M. J. Melancon, Barnett A. Rattner, L. J. LeCaptain