Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16727
Techniques for estimating abundance and species richness: Capture-recapture methods Techniques for estimating abundance and species richness: Capture-recapture methods
No abstract available.
Authors
J.D. Nichols, C.R. Dickman
Mineral intergrowths replaced by "elbow-twinned" rutile in altered rocks Mineral intergrowths replaced by "elbow-twinned" rutile in altered rocks
Some aggregates of rutile, classically considered to be "elbow" twinned, instead are topotactic replacements of ilmenite or other hexagonal titaniferous precursors. Twinned rutile can be differentiated from the reticulated rutile of topotactic replacements by the angle of prism intersections, junction morphology, and the overall form of the aggregate. In a special case of topotactic...
Authors
E. R. Force, R. P. Richards, K. M. Scott, P. C. Valentine, N.S. Fishman
Seismic velocities for hydrate-bearing sediments using weighted equation Seismic velocities for hydrate-bearing sediments using weighted equation
A weighted equation based on the three-phase time-average and Wood equations is applied to derive a relationship between the compressional wave (P wave) velocity and the amount of hydrates filling the pore space. The proposed theory predicts accurate P wave velocities of marine sediments in the porosity range of 40-80% and provides a practical means of estimating the amount of in situ...
Authors
Myung W. Lee, D. R. Hutchinson, T. S. Collett, William P. Dillon
Regional cholinesterase activity in white-throated sparrow brain is differentially affected by acephate (Orthene®) Regional cholinesterase activity in white-throated sparrow brain is differentially affected by acephate (Orthene®)
Effects of a 14-day dietary exposure to an organophosphorus pesticide, acephate (acetylphosphoramidothioic acid O,S-dimethyl ester), were determined on cholinesterase activity in three regions (basal ganglia, hippocampus, and hypothalamus) of the white-throated sparrow, Zonotrichia albicollis, brain. All three regions experienced depressed cholinesterase activity between 0.5–2 ppm...
Authors
N.B. Vyas, Wayne J. Kuenzel, E. F. Hill, G.A. Romo, M.V.S. Komaragiri
Predator management to protect endangered avian species Predator management to protect endangered avian species
No abstract available.
Authors
G.W. Witmer, J.L. Bucknall, T. H. Fritts, D.G. Moreno
Fregata minor, great frigatebird, in Oklahoma Fregata minor, great frigatebird, in Oklahoma
No abstract available.
Authors
J.S. Tomer, R. B. Clapp, J.C. Hoffman
Flood magnitude and frequency of Little Timber Creek at the culvert on Interstate Route 295, Haddon Heights Township, Camden County, New Jersey Flood magnitude and frequency of Little Timber Creek at the culvert on Interstate Route 295, Haddon Heights Township, Camden County, New Jersey
The magnitude and frequency of floods at the Little Timber Creek at the culvert on Interstate 295, at milepost 28.9, in Haddon Heights Township, New Jersey, were determined by using the New Jersey Department of Environmental Protection Special Report 38 method. Flood-magnitude and -frequency estimates, as well as drainage-basin characteristics, are included in this report. The 100-year...
Authors
T. H. Barringer
Breeding bird census: Planted cottonwood forest -inside levee Breeding bird census: Planted cottonwood forest -inside levee
No abstract available.
Authors
Daniel J. Twedt
Small mammal populations in Maryland meadows during four years of herbicide (brominal®) applications Small mammal populations in Maryland meadows during four years of herbicide (brominal®) applications
The herbicide Brominal® was applied at the recommended rate to one plot in each of three paired 0.6-ha plots; the other three plots were used as controls. Plots were sprayed once in the fall of 1988 and 1989 and twice in the spring of 1990 and 1991. Small mammals were trapped three times during each activity season (April-October) to obtain population estimates before and after spraying...
Authors
D. R. Clark, C.A. Moulton, J.E. Hines, D. J. Hoffman
Interlaboratory study of precision: Hyalella azteca and Chironomus tentans freshwater sediment toxicity assays Interlaboratory study of precision: Hyalella azteca and Chironomus tentans freshwater sediment toxicity assays
Standard 10-d whole-sediment toxicity test methods have recently been developed by the U.S. Environmental Protection Agency (EPA) for the amphipod Hyalella azteca and the midge Chironomus tentans. An interlaboratory evaluation of method precision was performed using a group of seven to 10 laboratories, representing government, academia, and environmental consulting firms. The test...
Authors
G.A. Burton, T. J. Norberg-King, C.G. Ingersoll, D.A. Benoit, G.T. Ankley, P. V. Winger, J. Kubitz, J.M. Lazorchak, M.E. Smith, E. Greer, F.J. Dwyer, D.J. Call, K.E. Day, P. Kennedy, M. Stinson
Description of adults, eggshells, nestling, fledgling, and nest of the poo-uli Description of adults, eggshells, nestling, fledgling, and nest of the poo-uli
The Poo-uli (Melamprosops phaeosoma), a Hawaiian honeycreeper discovered on the island of Maui in 1973 and now near extinction, is represented in museums by only two specimens. Based on the first observations of a nesting pair and re-examination of the two specimens, we describe the adult male and female, eggshells, nestling, and fledgling Poo-uli. Poo-uli are sexually monochromatic but...
Authors
A. Engilis, T.K. Pratt, C. B. Kepler, A.M. Ecton, K.M. Fluetsch
Nesting behavior of the poo-uli Nesting behavior of the poo-uli
We describe two sequential nestings of a pair of Poo-uli (Melamprosops phaeosoma), a Hawaiian honeycreeper nearing extinction. Similarities to nesting of most other honeycreepers included: nest site in ohia lehua (Metrosideros polymorpha Gaud.) canopy; breeding in March through June; monogamous breeding system with the putative male helping build the nest, feeding the putative female...
Authors
C. B. Kepler, T.K. Pratt, A.M. Ecton, A. Engilis, K.M. Fluetsch