Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16731
Trekking poles: Can you save your knees and the environment? Trekking poles: Can you save your knees and the environment?
The increasing use of trekking poles has stimulated a growing awareness of some environmental and social impacts associated with their use. These impacts have not been documented in the scientific literature. This article reviews the impacts of trekking pole use to provide a basis for further dialogue, and suggests how they may be altered or used in ways that will minimize impact.
Authors
J. L. Marion, T. A. Martinez, R. D. Proudman
Diving duck trends in Chesapeake Bay Diving duck trends in Chesapeake Bay
No abstract available.
Authors
Matthew C. Perry, P.C. Osenton, E.J.R. Lohnes
Artificial insemination in captive Whooping Cranes: Results from genetic analyses Artificial insemination in captive Whooping Cranes: Results from genetic analyses
Artificial insemination has been used frequently in the captive whooping crane (Grus americana) population. In the 1980s, it was necessary at times to inseminate females with semen from several males during the breeding season or with semen from multiple males simultaneously due to unknown sperm viability of the breeding males. The goals of this study were to apply microsatellite DNA...
Authors
K.L. Jones, Jane M. Nicolich
Of cranes and men: Reintroduction of cranes to a migratory pathway - Part I Of cranes and men: Reintroduction of cranes to a migratory pathway - Part I
No abstract available.
Authors
Glenn H. Olsen
Estandardizacion en los estudios de diversidad biologica Estandardizacion en los estudios de diversidad biologica
No abstract available.
Authors
M.S. Foster
Natural fertility in whooping cranes and Mississippi sandhill cranes at Patuxent Wildlife Research Center Natural fertility in whooping cranes and Mississippi sandhill cranes at Patuxent Wildlife Research Center
The first fertile whooping crane (Grus americana; WC) egg produced through natural breeding at Patuxent Wildlife Research Center (Patuxent) was laid in 1991. Prior to that time, all fertile whooping crane eggs were the result of artificial insemination. Since 1991, eight different whooping crane pairs at Patuxent have produced fertile eggs through natural breeding. Mean fertility...
Authors
Jane M. Nicolich, G.F. Gee, D. H. Ellis, Scott G. Hereford
A reintroduction experiment involving mated pairs of parent-reared greater sandhill cranes in northern Arizona A reintroduction experiment involving mated pairs of parent-reared greater sandhill cranes in northern Arizona
In April 1997, 4 mated pairs of adult greater sandhill cranes (Grus canadensis tabida) were abrupt-released at Mormon Lake, Arizona. Five of 8 adult cranes died within 10 days of release. One crane flew from the release area within 10 days after release and was never relocated. One pair of cranes, with 1 pair member sustaining a broken wing 4 days after release, survived for 4 months and
Authors
D.P. Mummert, D. H. Ellis, C. L. Chambers
Results of the second (1996) experiment to lead cranes on migration behind a motorized ground vehicle Results of the second (1996) experiment to lead cranes on migration behind a motorized ground vehicle
Fourteen greater sandhill cranes (Grus canadensis tabida) were trained to follow a specially-equipped truck and 12 were led along a ca 620-km route from Camp Navajo in northern Arizona to the Buenos Aires National Wildlife Refuge near the Arizona/Mexico border. Ten survived the trek, 380 km of which were flown, although only a few cranes flew every stage of the route. Major problems...
Authors
D. H. Ellis, B. Clauss, T. Watanabe, R.C. Mykut, M. Shawkey, D.P. Mummert, D.T. Sprague, Catherine H. Ellis, F.B. Trahan
Results of the first ultralight-led sandhill crane migration in eastern North America Results of the first ultralight-led sandhill crane migration in eastern North America
In 1997, we led 8 sandhill cranes (Grus canadensis) south from Ontario, Canada by ultralight aircraft to a wintering area near Warrenton, Virginia, an area without a wild population. Six others were transported south in a trailer in hopes they would return north with those that flew. The migration was 863 km long, included 14 stops, and took 21 days to complete. All 13 surviving birds...
Authors
Joseph W. Duff, William A. Lishman, D. A. Clark, G.F. Gee, D. H. Ellis
Whooping cranes breeding at White Lake, Louisiana, 1939: observations by John J. Lynch, U.S. Bureau of Biological Survey Whooping cranes breeding at White Lake, Louisiana, 1939: observations by John J. Lynch, U.S. Bureau of Biological Survey
On 15 May 1939, John J. Lynch of the U.S. Bureau of Biological Survey located 13 whooping cranes (Grus americana), including 2 prefledged young, during an aerial survey near White Lake in southwestern Louisiana. His observation was the last historic record of whooping cranes breeding in the wild in the United States, and it confirmed the presence of a nonmigratory breeding population...
Authors
Rod C. Drewien, J. Tautin, M.L. Courville, G.M. Gomez
Ecological considerations for reservoir planning in north Georgia Ecological considerations for reservoir planning in north Georgia
No abstract available.
Authors
Mary C. Freeman, M.D. Merrill, B. J. Freeman