Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16757
Injection or immersion delivery of selected immunostimulants to trout demonstrate enhancement of nonspecific defense mechanisms and protective immunity Injection or immersion delivery of selected immunostimulants to trout demonstrate enhancement of nonspecific defense mechanisms and protective immunity
No abstract available at this time
Authors
D. P. Anderson, A.K. Siwicki, G. L. Rumsey
Measuring streamflow in Virginia Measuring streamflow in Virginia
No abstract available.
Authors
Roger M. Moberg, Karen C. Rice, Eugene D. Powell
Net photosynthesis and respiration of sago pondweed (Potamogeton pectinatus) exposed to herbicides Net photosynthesis and respiration of sago pondweed (Potamogeton pectinatus) exposed to herbicides
We determined net photosynthesis and respiration rates for sago pondweed (potamogeton pectinatus) exposed to various concentrations of 11 herbicides widely used in Maryland during the past decade. Net photosynthesis and respiration were determined by measuring changes in the. oxygen content of solutions containing dilutions of technical grade herbicides. At 20-22? C and 58 umol/m2/sec of
Authors
W. James Fleming, M.S. Ailstock, J.J. Momot
Puerto Rican parrots and potential limitations of the metapopulation approach to species conservation Puerto Rican parrots and potential limitations of the metapopulation approach to species conservation
No abstract available.
Authors
M.H. Wilson, C. B. Kepler, N.F.R. Snyder, S.R. Derrickson, F. J. Dein, J. W. Wiley, J.M. Wunderle, A.E. Lugo, D.L. Graham, W.D. Toone
Waterfowl population trends in the Chesapeake Bay area Waterfowl population trends in the Chesapeake Bay area
No abstract available.
Authors
Matthew C. Perry, A.S. Deller
Glaciological observations of Brúarjökull, Iceland, using synthetic aperture radar and thematic mapper satellite data Glaciological observations of Brúarjökull, Iceland, using synthetic aperture radar and thematic mapper satellite data
The first European Remote Sensing Satellite (ERS-1) synthetic aperture radar (SAR) images offer opportunities for studying glacier surface properties and near-surface features. Analysis of back-scatter values from digital SAR data from 18 January, 7 June, 1 September and 25 October 1993 of Brúarjökull, an outlet glacier on the northeastern margin of the Vatnajökull ice cap, Iceland, that...
Authors
Dorothy K. Hall, Richard S. Williams, Oddur Sigurdsson
The ninety-fifth Christmas bird count. SD MD. Southern Dorchester County, MD The ninety-fifth Christmas bird count. SD MD. Southern Dorchester County, MD
No abstract available.
Authors
C.S. Robbins, E. Martin
The ninety-fifth Christmas Bird Count. OC MD. Ocean City, MD The ninety-fifth Christmas Bird Count. OC MD. Ocean City, MD
No abstract available.
Authors
C.S. Robbins, J.M. Sheppard
Sediment toxicity in Savannah Harbor Sediment toxicity in Savannah Harbor
Savannah Harbor, located near the mouth of the Savannah River, Georgia and South Carolina, is impacted by industrial and municipal effluents. Potential release of contaminants stored in harbor sediments through dredging and shipping operations requires that contaminated areas be identified for proper management of the system and protection of wildlife resources. During 1991, Hyalella...
Authors
P. V. Winger, P. J. Lasier
The reconstruction of Kenilworth Marsh, the last tidal marsh in Washington, D.C. The reconstruction of Kenilworth Marsh, the last tidal marsh in Washington, D.C.
No abstract available.
Authors
S.W. Syphax, R.S. Hammerschlag
Acephate affects migratory orientation of the white-throated sparrow (Zonotrichia albicollis) Acephate affects migratory orientation of the white-throated sparrow (Zonotrichia albicollis)
Migratory white-throated sparrows (Zonotrichia albicollis) were exposed to acephate (acetylphosphoramidothioic acid O, S-dimethyl ester), an organophosphorus pesticide, to determine its effects on migratory orientation and behavior. Birds were also exposed to polarizer sheets to determine the mechanism by which acephate may affect migratory orientation. Adult birds exposed to 256 ppm...
Authors
N.B. Vyas, E. F. Hill, J.R. Sauer, Wayne J. Kuenzel
Application of brain cholinesterase reactivation to differentiate between organophosphorus and carbamate pesticide exposure in wild birds Application of brain cholinesterase reactivation to differentiate between organophosphorus and carbamate pesticide exposure in wild birds
Brain cholinesterase activity was measured to evaluate pesticide exposure in wild birds. Thermal reactivation of brain cholinesterase was used to differentiate between carbamate and organophosphorus pesticide exposure. Brain cholinesterase activity was compared with gas chromatography and mass spectrometry of stomach contents. Pesticides were identified and confirmed in 86 of 102...
Authors
W. R. Smith, N. J. Thomas, C. Hulse