Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16795
Accumulation of trace elements and organochlorines by surf scoters wintering in the Pacific northwest
Selenium, cadmium, mercury, copper, manganese, zinc, aluminum, lead, PCBs and DDE were accumulated by segments of the surf scoter (Melanitta perspicillata) population that winters in the Pacific Northwest, but whether the uptake occurred on breeding and/or wintering grounds was uncertain for some contaminants. Surf scoters collected in Puget Sound and San Francisco Bay (in another study) during th
Authors
C. J. Henny, L. J. Blus, R. A. Grove, S.P. Thompson
Radio tracking Puerto Rican parrots: assessing triangulation accuracy in an insular rain forest
No abstract available.
Authors
G.D. Lindsey, W.J. Arendt
Historical changes in laying date, clutch size, and nest success of American black ducks
The breeding population of American black ducks (Anas rubripes ) on Chesapeake Bay has declined over the past 30 years. We tested whether there have been changes in laying date, clutch size, and nest success of breeding black ducks on islands in Chesapeake Bay between the 1950's and 1980's. None of these variables differed significantly between decades, suggesting that other factors must be resp
Authors
D.G. Krementz, Vernon D. Stotts, D.B. Stotts, J. E. Hines, S.L. Funderburk
Movements and survival of American black duck and mallard broods on Chesapeake Bay
We attached radio transmitters to day-old American black duck (Anas rubripes) and mallard (A. platyrhynchos) ducklings and monitored duckling habitat use, brood movements, and survival rates for 30 days. Ducklings moved an average of 2.3 km within the first 24 hours and another 1.5 km thereafter. After the initial move, broods usually moved once more. No differences in initial movement distance, s
Authors
D.G. Krementz, G.W. Pendleton
Atmospheric organochlorine pollutants and air-sea exchange of hexachlorocyclohexane in the Bering and Chukchi Seas
Organochlorine pesticides have been found in Arctic fish, marine mammals, birds, and plankton for some time. The lack of local sources and remoteness of the region imply long-range transport and deposition of contaminants into the Arctic from sources to the south. While on the third Soviet-American Joint Ecological Expedition to the Bering and Chukchi Seas (August 1988), high-volume air samples
Authors
D.A. Hinckley, T.F. Bidleman, C.P. Rice
Factors affecting winter distribution and migration distance of wood ducks from southern breeding populations
We used direct band-recovery records of Wood Ducks (Aix sponsa) banded 1 April-15 September (1960-1987) in the southern and southeastern reference areas of Bowers and Martin (1975) to test whether winter distribution and migration distance were age- and sex-specific. Effects of variation in early-autumn temperature and precipitation conditions on winter distribution patterns also were studied. Lat
Authors
G. R. Hepp, J. E. Hines
Testing the Wildlink activity-detection system on wolves and white-tailed deer
We tested the reliability and predictive capabilities of the activity meter in the new Wildlink Data Acquisition and Recapture System by comparing activity counts with concurrent observations of captive wolf (Canis lupus) and free-ranging white-tailed deer (Odocoileus virginianus) activity. The Wildlink system stores activity data in a computer within a radio collar with which a biologist can com
Authors
K. E. Kunkel, R.C. Chapman, L. D. Mech, E.M. Gese
The first experimental reintroduction of captive-reared Andean condors (Vultur gryphus) into Colombia, South America
No abstract available.
Authors
A. Lieberman, J. W. Wiley, J.V. Rodriguez, J.M. Paez
Introgression of coyote mitochondrial DNA into sympatric North American gray wolf populations
Mitochondrial DNA (mtDNA) genotypes of gray wolves and coyotes from localities throughout North America were determined using restriction fragment length polymorphisms. Of the 13 genotypes found among the wolves, 7 are clearly of coyote origin, indicating that genetic transfer of coyote mtDNA into wolf populations has occurred through hybridization. The transfer of mtDNA appears unidirectional fro
Authors
Niles Lehman, Andrew Eisenhawer, Kimberly Hansen, L. David Mech, Rolf O. Peterson, Peter J.P. Gogan, Robert K. Wayne
Estimates of movement and site fidelity using mark-resight data of wintering Canada geese
Population ecologists have devoted disproportionate attention to the estimation and study of birth and death rates and far less effort to rates of movement. Movement and fidelity to wintering areas have important ecological and evolutionary implications for avian populations. Previous inferences about movement among and fidelity to wintering areas have been restricted by limitations of data and me
Authors
J.B. Hestbeck, J. D. Nichols, R.A. Malecki
Band reporting rates for mallards with reward bands of different dollar values
Adult male mallards (Anas platyrhynchos ) were banded in summer 1987 with reward bands of different dollar values (0-$400) to determine the lowest dollar value that would yield a reporting rate approaching 1.0. During the 1987-88 and 1988-89 hunting seasons, rewards of between 50 and $100 were required to yield a reporting rate near 1.0. We estimated reporting rate of standard bands to be 0.32.
Authors
J. D. Nichols, R.J. Blohm, R. E. Reynolds, R.E. Trost, J. E. Hines, J.P. Bladen
The Bodie-Pea Island Christmas bird count: A 25-year summary
No abstract available.
Authors
P.W. Sykes