Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16739
Feeding habits of cormorants in eastern Lake Ontario Feeding habits of cormorants in eastern Lake Ontario
No abstract available at this time
Authors
R. M. Ross, J. H. Johnson
Endocrine control of cartilage growth in coho salmon: GH influence in vivo on the response to IGF-I in vitro Endocrine control of cartilage growth in coho salmon: GH influence in vivo on the response to IGF-I in vitro
No abstract available.
Authors
P.I. Tsai, Steffen S. Madsen, S. D. McCormick, H. A. Bern
Dioxins and furans linked to reproductive impairment in wood ducks Dioxins and furans linked to reproductive impairment in wood ducks
A wetland in central Arkansas was contaminated with polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans and because the area was a major waterfowl habitat, we studied the effects of the contamination on nesting wood ducks (Aix sponsa) during 1988-90. Residues in wood duck eggs, based on toxicity equivalency factors (TEFs) for combined compounds, ranged from 0.2 to 611...
Authors
Donald H. White, John T. Seginak
Assessing Crow Indian coal resources: GIS in action Assessing Crow Indian coal resources: GIS in action
No abstract available.
Authors
W.D. Watson, K. Bryant, N.K. Gardner, M. S. Grim, G. Lebing
A comparison of black drum, red drum, and their hybrid saltwater pond culture A comparison of black drum, red drum, and their hybrid saltwater pond culture
Hybridization has been used in aquaculture to produce fish that exhibit improved growth and survival over parent species. Previous studies produced an intergeneric hybrid by crossing female black drum Pogonias cromis with male red drum Sciaenops ocellatus. In the present study, the two parent species and their hybrid were simultaneously cultured in ponds for 9 mo. Two- to three-day-old...
Authors
A. Henderson-Arzapalo, R.L. Colura, A.F. Macioroski
Changes in cortisol dynamics in wild and hatchery-reared juvenile coho salmon (Oncorhynchus kisutch) during smoltification Changes in cortisol dynamics in wild and hatchery-reared juvenile coho salmon (Oncorhynchus kisutch) during smoltification
No abstract available.
Authors
J. M. Shrimpton, N.J. Bernier, D.J. Randall
Deep structure beneath Lake Ontario: Crustal-scale Grenville subdivisions Deep structure beneath Lake Ontario: Crustal-scale Grenville subdivisions
Lake Ontario marine seismic data reveal major Grenville crustal subdivisions beneath central and southern Lake Ontario separated by interpreted shear zones that extend to the lower crust. A shear zone bounded transition between the Elzevir and Frontenac terranes exposed north of Lake Ontario is linked to a seismically defined shear zone beneath central Lake Ontario by prominent...
Authors
D. A. Forsyth, Bernd Milkereit, Colin A. Zelt, D. J. White, R. M. Easton, Deborah R. Hutchinson
Retention of web tags and plasticine-filled leg bands applied to day-old ducklings Retention of web tags and plasticine-filled leg bands applied to day-old ducklings
A new plasticine-filled leg band was developed for use in banding dayold ducklings. These bands permit inference about early survival that is not possible from banding of older young in standard operations. Two double-marking experiments with web tags and the new leg bands indicated a high retention rate for the leg bands. In contrast, several web tags were lost, permitting an analysis...
Authors
Peter Blums, Aivars Mednis, James D. Nichols
Historical shoreline mapping (II): Application of the Digital Shoreline Mapping and Analysis Systems (DSMS/DSAS) to shoreline change mapping in Puerto Rico Historical shoreline mapping (II): Application of the Digital Shoreline Mapping and Analysis Systems (DSMS/DSAS) to shoreline change mapping in Puerto Rico
A new, state-of-the-art method for mapping historical shorelines from maps and aerial photographs, the Digital Shoreline Mapping System (DSMS), has been developed. The DSMS is a freely available, public domain software package that meets the cartographic and photogrammetric requirements of precise coastal mapping, and provides a means to quantify and analyze different sources of error in...
Authors
E. Robert Thieler, William W. Danforth
Lake Michigan's late Quaternary limnological and climate history from ostracode, oxygen isotope, and magnetic susceptibility Lake Michigan's late Quaternary limnological and climate history from ostracode, oxygen isotope, and magnetic susceptibility
The limnology of Lake Michigan has changed dramatically since the late Pleistocene in response to the expansion and contraction of continental glaciers, to differential isostatic rebound, and to climate change. The lake sediment's stratigraphic trends, magnetic susceptibility, δ18O, and ostracode species abundance ratios provide criteria to identify the lake's response to glacial ice and...
Authors
Richard M. Forester, Steven M. Colman, Richard L. Reynolds, Loyd D. Keigwin
Adult Slaty-backed Gulls: Variability in mantle color and comments on identification Adult Slaty-backed Gulls: Variability in mantle color and comments on identification
No abstract available.
Authors
M.E. Gustafson, B.G. Peterjohn
Altitude and configuration of the potentiometric surface, May and June 1993, and change in water level 1983-93, in the carbonate rocks in part of East Whiteland and Charlestown Townships, Chester County, Pennsylvania Altitude and configuration of the potentiometric surface, May and June 1993, and change in water level 1983-93, in the carbonate rocks in part of East Whiteland and Charlestown Townships, Chester County, Pennsylvania
A map showing ground-water levels in the carbonate rocks of northern Chester County, Pa., was constructed on the basis of water levels in 51 wells measured in May and June 1993. The area studied underlies parts of East Whiteland and Charlestown Townships. Water-level altitudes range from about 413 feet above sea level on Phoenixville Pike to 130 feet above sea level along Route 29.
Authors
B. C. McManus, R. A. Sloto