Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16743
Preliminary raptor surveys in western Mongolia Preliminary raptor surveys in western Mongolia
Raptors were observed on a 5200 km expedition from Ulaan Baatar through the Hangay Mountains to the Russian Altay Mountains with return through the Gobi Altay Mountains. The focus of the expedition was on nesting ecology of the Saker (Falco cherrug) and Altay falcons (F. altaicus) (25 eyries were located), but nests were also found for seven other species including more than 30 nests...
Authors
D. H. Ellis, Merlin H. Ellis, Pu Tsengeg
Forested wetlands constructed for mitigation of destroyed natural wetlands Forested wetlands constructed for mitigation of destroyed natural wetlands
Forested wetlands constructed for mitigation were evaluated at six sites in Maryland to determine the success of these areas for providing suitable wildlife habitat. Natural forested wetlands were used as reference sites. Initial mortality of planted woody shrubs and trees was high (avg. 55%) and mostly attributed to excessive moisture. The number of woody seedlings from natural...
Authors
Matthew C. Perry, S.B. Pugh, A.S. Deller
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
Comparative behavior and dietary effects in early life stages of American sturgeons Comparative behavior and dietary effects in early life stages of American sturgeons
No abstract available at this time
Authors
R. M. Ross, R. M. Bennett
Radiocarbon ages of pre-bomb clams and the hard-water effect in Lakes Michigan and Huron Radiocarbon ages of pre-bomb clams and the hard-water effect in Lakes Michigan and Huron
Five radiocarbon ages, all determined by accelerator mass spectrometry, have been obtained for two pre-bomb bivalves from Lake Michigan and one from Lake Huron. After correcting those ages for the fractionation of14C in calcite and for the radioactively inert CO2 in the atmosphere, we find residual ages, caused by the hard water effect, of about 250 years for Lake Michigan and 440 years...
Authors
David K. Rea, Steven M. Colman
Geological mapping of biological habitats on Georges Bank and Stellwaen Bank, Gulf of Maine region Geological mapping of biological habitats on Georges Bank and Stellwaen Bank, Gulf of Maine region
No abstract available.
Authors
Page C. Valentine, Eric A. Schmuck
Association of Cytophaga psychrophila with mortality among eyed eggs of Atlantic salmon (Salmo salar) Association of Cytophaga psychrophila with mortality among eyed eggs of Atlantic salmon (Salmo salar)
Although Pseudomonas fluorescens was the predominant bacterium associated with Atlantic salmon (Salmo salar) eggs incubated at the White River National Fish Hatchery (Bethel, Vermont) during January 1992, the fish pathogen Cytophaga psychrophila was isolated only from specific lots of eggs that displayed poor survival (35% eye-up).
Authors
R. C. Cipriano, L.A. Ford, J.D. Teska
A mechanism for decoupling within the oceanic lithosphere revealed in the Troodos ophiolite A mechanism for decoupling within the oceanic lithosphere revealed in the Troodos ophiolite
Contrasting kinematic histories recorded in the sheeted dykes and underlying plutonic rocks of the Troodos ophiolite provide a new perspective on the mechanical evolution of oceanic spreading centres. The kinematic framework of the decoupling zone that partitions deformation between the sheeted dykes and plutonics contrasts with low-angle detachment models for slow-spreading ridges based...
Authors
Susan M. Agar, Kim D. Klitgord
A colored leg banding technique for Amazona parrots A colored leg banding technique for Amazona parrots
A technique for individual identification of Amazona was developed using plastic leg bands. Bands were made from 5- and 7-mm-wide strips of laminated PVC coiled 2.5 times with an inside diameter 4-5 mm gt the maximum diameter of the parrot's leg. Seventeen parrots were captured in Puerto Rico, marked with individual plastic leg bands, and observed for 204-658 d with only one lost or...
Authors
J.M. Meyers