Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16746
Pathogenicity of Steinernema carpocapsae and S. glaseri (Nematoda: Steinernematidae) to Ixodes scapularis (Acari: Ixodidae) Pathogenicity of Steinernema carpocapsae and S. glaseri (Nematoda: Steinernematidae) to Ixodes scapularis (Acari: Ixodidae)
The entomopathogenic nematodes Steinernema carpocapsae (Weiser) and S. glaseri (Steiner) are pathogenic to engorged adult, blacklegged ticks, Ixodes scapularis (Say), but not to unfed females, engorged nymphs, or engorged larvae. Nematodes apparently enter the tick through the genital pore, thus precluding infection of immature ticks. The timing of tick mortality, and overall mortality...
Authors
E. Zhioua, R.A. LeBrun, H. S. Ginsberg, A. Aeschliman
The cumulative effect of consecutive winters' snow depth on moose and deer populations: a defence The cumulative effect of consecutive winters' snow depth on moose and deer populations: a defence
1. L. D. Mech et al. presented evidence that moose Alces alces and deer Odocoileus virginianus population parameters re influenced by a cumulative effect of three winters' snow depth. They postulated that snow depth affects adult ungulates cumulatively from winter to winter and results in measurable offspring effects after the third winter. 2. F. Messier challenged those findings and...
Authors
R.E. McRoberts, L.D. Mech, R. O. Peterson
Contaminants and sea ducks in Alaska and the circumpolar region Contaminants and sea ducks in Alaska and the circumpolar region
We review nesting sea duck population declines in Alaska during recent decades and explore the possibility that contaminants may be implicated. Aerial surveys of the surf scoter (Melanitta perspicillata), white-winged scoter (M. fusca), black scoter (M. nigra), oldsqaw (Clangula hyemalis), spectacled eider (Somateria fischeri), and Steller's eider (Polysticta stellei) show long-term...
Authors
Charles Henny, Deborah D. Rudis, Thomas J. Roffe, Everett Robinson-Wilson
Mortality estimates of striped bass caught in Albemarle Sound and Roanoke River, North Carolina Mortality estimates of striped bass caught in Albemarle Sound and Roanoke River, North Carolina
A statistical analysis of the age composition of striped bass Morone saxatilis harvested in Albemarle Sound and the Roanoke River, North Carolina. indicated that in 1988–1992 the population experienced a relatively high rate of total mortality. Age‐3 and older fish were estimated to have been fully vulnerable to fishing mortality and to have experienced a total instantaneous mortality...
Authors
Robert Dorazio
Use of ultrasonic telemetry to locate the spawning area of Chinese sturgeons Use of ultrasonic telemetry to locate the spawning area of Chinese sturgeons
No abstract available.
Authors
Boyd Kynard, Qiwei Wei, Fu’en Ke
Three-dimensional modeling of pull-apart basins: implications for the tectonics of the Dead Sea Basin Three-dimensional modeling of pull-apart basins: implications for the tectonics of the Dead Sea Basin
We model the three-dimensional (3-D) crustal deformation in a deep pull-apart basin as a result of relative plate motion along a transform system and compare the results to the tectonics of the Dead Sea Basin. The brittle upper crust is modeled by a boundary element technique as an elastic block, broken by two en echelon semi-infinite vertical faults. The deformation is caused by a...
Authors
Rafael Katzman, Uri S. ten Brink, Jian Lin
Use of modern infrared thermography for wildlife population surveys Use of modern infrared thermography for wildlife population surveys
A commercially available thermal-infrared scanning system was used to survey populations of several wildlife species. The system's ability to detect species of different sizes in varying habitats relative to conventional survey methods, to differentiate between species in the same habitat, and the influence of environmental factors on operational aspects of employing this technology in...
Authors
D.L. Garner, H.B. Underwood, W.F. Porter
Upper Eocene impactites of the U.S. East Coast; depositional origins, biostratigraphic framework, and correlation Upper Eocene impactites of the U.S. East Coast; depositional origins, biostratigraphic framework, and correlation
Similar successions of planktonic foraminifera, calcareous nannofossils, and bolboformids document coeval deposition of the Exmore impact breccia (Virginia Coastal Plain) and an impact ejecta layer at DSDP Site 612 (New Jersey Continental Slope). Both impactites accumulated in the late Eocene during the early part of biochrons P15 (planktonic foraminifera) and NP 19-20 (calcareous...
Authors
C. Wylie Poag, Marie-Pierre Aubry
A proposed North American amphibian monitoring program A proposed North American amphibian monitoring program
No abstract available.
Authors
C. Bishop, D. Bradford, G. Casper, S. Corn, Sam Droege, G. Fellers, P. Geissler, D.M. Green, R. Heyer, M. Lannoo, D. Larson, D. Johnson, R. McDiarmid, J. Sauer, B. Shaffer, H. Whiteman, H. Wilbur
The Pennsylvanian Fire Clay tonstein of the Appalachian basin—Its distribution, biostratigraphy, and mineralogy: Discussion and reply The Pennsylvanian Fire Clay tonstein of the Appalachian basin—Its distribution, biostratigraphy, and mineralogy: Discussion and reply
No abstract available.
Authors
William Outerbridge, C. L. Rice, Harvey E. Belkin, T.W. Henry, Michael J. Kunk
Composition of biotite phenocrysts in Ordovician tephras casts doubt on the proposed trans-Atlantic correlation of the Millbrig K-bentonite (United States) and the Kinnekulle K-bentonite (Sweden) Composition of biotite phenocrysts in Ordovician tephras casts doubt on the proposed trans-Atlantic correlation of the Millbrig K-bentonite (United States) and the Kinnekulle K-bentonite (Sweden)
Biotite phenocryst compositions in three thick, widespread Ordovician K-bentonites, the Deicke and Millbrig from Big Ridge, Alabama, and the Kinnekulle from Mossen, Västergötland, Sweden, fall into three distinct groups, and so the proposed intercontinental correlation of the Millbrig and the Kinnekulle is suspect. Because the biotites are nearly pristine compositionally, electron...
Authors
John T. Haynes, W.G. Melson, Michael J. Kunk