Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16756
Another instance of a Carolina chickadee laying eggs in two nests Another instance of a Carolina chickadee laying eggs in two nests
No abstract available.
Authors
R. B. Clapp, A.C. Mellinger
Reproduction of black-crowned night-herons related to predation and contaminants in Oregon and Washington, USA Reproduction of black-crowned night-herons related to predation and contaminants in Oregon and Washington, USA
We studied reproductive characteristics of Black-crowned Night-Herons (Nycticorax nycticorax) at four colonies in south central Washington and one colony in north central Oregon in 1991. Nest success, adjusted using the Mayfield method, was significantly different between colonies and ranged from 12-84% to hatching and 12-73% to 14 days post-hatching. The mean number of young surviving...
Authors
L. J. Blus, Barnett A. Rattner, M. J. Melancon, Charles J. Henny
Secondary poisoning of kestrels by white phosphorus Secondary poisoning of kestrels by white phosphorus
Since 1982, extensive waterfowl mortality due to white phosphorous (P4) has been observed at Eagle River Flats, a tidal marsh near Anchorage, Alaska. Ducks and swans that ingest P4 pellets become lethargic and may display severe convulsions. Intoxicated waterfowl attract raptors and gulls that feed on dead or dying birds. To determine if avian predators can be affected by secondary...
Authors
Donald W. Sparling, Nicholas E. Federoff
Cytochrome P450 and organochlorine contaminants in black-crowned night-herons from the Chesapeake Bay region, USA Cytochrome P450 and organochlorine contaminants in black-crowned night-herons from the Chesapeake Bay region, USA
Black-crowned night-heron (Nycticorax nycticorax) offspring were collected from a relatively uncontaminated coastal reference site (next to Chincoteague National Wildlife Refuge, VA, USA) and two sites in the Chesapeake Bay watershed (Baltimore Harbor, MD and Rock Creek Park, Washington, DC, USA). Hepatic microsomal activities of benzyloxyresorufin-O-dealkylase and ethoxyresorufin-O...
Authors
Barnett A. Rattner, Mark J. Melancon, Clifford P. Rice, Walter Riley, John D. Eisemann, Randy K. Hines
Po'ouli (Melamprosops phaeosoma) Po'ouli (Melamprosops phaeosoma)
No abstract available.
Authors
T.K. Pratt, C. B. Kepler, T.L.C. Casey
Acidification of experimental wetlands: Effects on wetland productivity and survival of juvenile black ducks Acidification of experimental wetlands: Effects on wetland productivity and survival of juvenile black ducks
Six man-made wetlands (0.02 ha each) and pen-reared broods of American black ducks (Anas rubripes) were used to assess the effects of reduced pH on the quality of fish- free, palustrine habitat for brood rearing. Acid treatment was assigned randomly among newly constructed wetlands during April through June 1984-85, to simulate depressed pH from snowmelt and spring rain. Sampling of...
Authors
G.M. Haramis, Diane S. Chu, C.M. Bunck, T.M. Mingo, W.W.R. Schaffner
Breeding habitat workshop Breeding habitat workshop
No abstract available.
Authors
Keith McAloney, J. R. Longcore
Black duck production workshop Black duck production workshop
No abstract available.
Authors
D.G. Krementz, A. Reed
Effects of harvest restrictions on black duck harvest and populations trends Effects of harvest restrictions on black duck harvest and populations trends
No abstract available.
Authors
J.R. Serie, R.E. Trost, J.R. Sauer
Multispecies lottery competition: a diffusion analysis Multispecies lottery competition: a diffusion analysis
The lottery model is a stochastic competition model designed for space-limited communities of sedentary organisms. Examples of such communities include coral reef fishes, aquatic sessile organisms, and many plant communities. Explicit conditions for the coexistence of two species and the stationary distribution of the two-species model were determined previously using an approximation...
Authors
Jeff S. Hatfield, P.L. Chesson
Winter mortality of common loons in Florida coastal waters Winter mortality of common loons in Florida coastal waters
Diagnostic findings are presented for 434 common loons (Gavia imrner) found sick or dead on Florida beaches from 1970 through 1994, primarily during the months of December to April. The most commonly recognized problem was an emaciation syndrome (66%), followed by oiling (18%), aspergillosis (7%), trauma (5%) and miscellaneous disease entities (1%). The cause-of-death for 3% of the birds...
Authors
Donald J. Forrester, W.R. Davidson, R.E. Lange, R. K. Stroud, L.L. Alexander, J. C. Franson, S. D. Haseltine, R.C. Littell, S.A. Nesbitt
A pair of roseate terns fledges three young with limited human assistance A pair of roseate terns fledges three young with limited human assistance
Hays (1994) reported that a trio of Roseate Terns (Sterna dougallii) raised three fledglings in 1991 at Great Gull Island, New York. Despite the regular occurrence of "supernormal" clutches of three or more eggs (Norton 1988, Hays 1994, Shealer and Zurovchak 1995), we are not aware of any reports of three young being fledged by just two adult Roseate Terns. Here we report a pair that...
Authors
Jeffrey A. Spendelow, James M. Zingo, Seah Foss