Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16922
Year-round movements of a Wahlberg's Eagle Aquila wahlbergi tracked by satellite Year-round movements of a Wahlberg's Eagle Aquila wahlbergi tracked by satellite
An adult female Wahlberg's Eagle from northern Namibia was tracked by satellite ovcr a total distance of 8816 km and located 104 times between 11 February and 4 November 1994. It migrated on an almost due north heading to northern Cameroon, north-eastern Nigeria and western Chad through the rain forest belt of the Congo and Zaire after the breeding season. The total trans-equatorial...
Authors
B.-U. Meyburg, J.M. Mendelsohn, D. H. Ellis, D.G. Smith, C. Meyburg, A.C. Kemp
The ninety-fifth Christmas bird count. Georgia/Florida The ninety-fifth Christmas bird count. Georgia/Florida
No abstract available.
Authors
P.W. Sykes
Assessing animal condition, nutrition, and stress from urine in snow: A critical view and response Assessing animal condition, nutrition, and stress from urine in snow: A critical view and response
No abstract available.
Authors
D. Saltz, Gary C. White, R.M. Bortmann, G. D. DelGiudice, M.R. Riggs, L.D. Mech, U.S. Seal
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
Quantitative assessment of pair formation behavior in captive whooping cranes (Grus americana) Quantitative assessment of pair formation behavior in captive whooping cranes (Grus americana)
Instantaneous scan sampling for mean distance and synchronous action patterns and all-occurrence sampling for unison call, dance, strut, and hoover-up behaviors were conducted for five potential whooping crane pairs at Patuxent Environmental Science Center, Laurel, Maryland. Dance, strut, and hoover-up differed among pairs, as did total frequency of social behaviors. It was unclear...
Authors
J.T. Nelson, C.R. Small, D. H. Ellis
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
Toxicity and bioaccumulation of sediment-associated contaminants using freshwater invertebrates: A review of methods and applications Toxicity and bioaccumulation of sediment-associated contaminants using freshwater invertebrates: A review of methods and applications
This paper reviews recent developments in methods for evaluating the toxicity and bioaccumulation of contaminants associated with freshwater sediments and summarizes example case studies demonstrating the application of these methods. Over the past decade, research has emphasized development of more specific testing procedures for conducting 10-d toxicity tests with the amphipod Hyalella...
Authors
C.G. Ingersoll, G.T. Ankley, D.A. Benoit, E.L. Brunson, G.A. Burton, F.J. Dwyer, R.A. Hoke, P.F. Landrum, T. J. Norberg-King, P. V. Winger
Environmental auditing: Capabilities and management utility of recreation impact monitoring programs Environmental auditing: Capabilities and management utility of recreation impact monitoring programs
A recreation impact monitoring system was developed and applied in 1984?1986 and in 1991 to all backcountry river-accessed campsites within Delaware Water Gap National Recreation Area, Pennsylvania and New Jersey. Results suggest that actions implemented by park managers in response to problems identified by the initial survey were highly effective in reducing resource degradation caused...
Authors
J. L. Marion
Distribution and abundance of Emoia slevini (Scincidae) in the Mariana Islands Distribution and abundance of Emoia slevini (Scincidae) in the Mariana Islands
No abstract available.
Authors
M. J. McCoid, G.H. Rodda, T. H. Fritts
Assessing ground-based counts of nestling bald eagles in northeastern Minnesota Assessing ground-based counts of nestling bald eagles in northeastern Minnesota
We present evidence that the bald eagle (Haliaeetus leucocephalus) productivity survey in the Boundary Waters Canoe Area Wilderness of northeastern Minnesota may have underestimated the number of nestlings during 1986-1988. Recommendations are provided to achieve more accurate ground-based counts. By conducting ground-based observations for up to 1 hour/nest, an accurate count of the...
Authors
M.R. Fuller, Jeff S. Hatfield, E. L. Lindquist
The role of the white-eyed vireo in the dispersal of Bursera fruit on the Yucatan Peninsula The role of the white-eyed vireo in the dispersal of Bursera fruit on the Yucatan Peninsula
White-eyed vireos (Vireo griseus) winter in the forests and secondary growth of the Yucatan Peninsula where Bursera simaruba (Burseraceae) is an abundant tree. Twenty-five per cent of all white-eyed vireos observed foraging visited Bursera trees. In addition, presence and abundance of territorial white-eyed vireos in small forest patches were correlated with the size of the Bursera crop...
Authors
R. Greenberg, M.S. Foster, L. Marquez-Valdelamar