Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16922
The effect of flunixin meglumine (Banamine) on the renal function in northern bobwhite (Colinus virginianus): an avian model The effect of flunixin meglumine (Banamine) on the renal function in northern bobwhite (Colinus virginianus): an avian model
No abstract available.
Authors
P. N. Klein, K. Charmatz, J. Langenberg
Hurricane Andrew's impact on freshwater resources Hurricane Andrew's impact on freshwater resources
No abstract available.
Authors
C. T. Roman, N.G. Aumen, Joel Trexler, R.J. Fennema, W.F. Loftus, M. A. Soukup
Herbivory on shoalgrass by wintering redheads in Texas Herbivory on shoalgrass by wintering redheads in Texas
An estimated 80% of redheads (Aythya americana) winter on the Laguna Madre of south Texas and Mexico and feed almost exclusively on shoalgrass (Halodule wrightii) rhizomes. Shoalgrass abundance has decreased by 60% over the past 30 years, and because the effects of shoalgrass loss on wintering redheads are unknown, we initiated a study to define habitat selection criteria and document...
Authors
Christine A. Mitchell, Thomas W. Custer, Phillip J. Zwank
Communal roosting and foraging behavior of staging sandhill cranes Communal roosting and foraging behavior of staging sandhill cranes
Each spring more than 300,000 Sandhill Cranes (Grus canadensis) roost communally at night in river channels in the Platte River Valley of Nebraska and disperse at dawn to forage in agricultural fields. Cranes with central roosts had activity ranges double the size of those with peripheral roosts; 42% of the birds changed activity ranges prior to the onset of migration. Minimum daily...
Authors
D. W. Sparling, Gary L. Krapu
Demography and movements of the omao (Myadestes obscurus) Demography and movements of the omao (Myadestes obscurus)
Density, age-specific survival, timing of breeding and molting, and movements of the Omao or Hawaiian Thrush (Myadestes obscurus) were studied at four sites on the island of Hawaii. Mean monthly density (birds/ha) was 3.23 +- 0.57, 1.07 +- 0.33, 3.23 +- 0. 16, and 3.74 +- 0.36 at Kau Forest, Hamakua. Keauhou Ranch, and Kilauea Forest study areas, respectively. Annual survival of juvenile...
Authors
C.J. Ralph, S.G. Fancy
Demography and movements of the endangered akepa and Hawaii creeper Demography and movements of the endangered akepa and Hawaii creeper
We studied populations of the endangered Akepa (Loxops coccineus coccineus) and Hawaii Creeper (Oreomystis mana) at four sites on the island of Hawaii. Mean monthly density (? SL) of Akepa was 5.74 t 0.87, 1.3? 0.41, 0.96 -? 0.13, and 0.76 ? 0.12 Akepa/ha at Kau Forest, Hamakua, Keauhou Ranch, and Kilauea Forest study areas, respectively. Hawaii Creepers were found at densities of 1.68...
Authors
C.J. Ralph, S.G. Fancy
Falcon versus grouse: flight adaptations of a predator and its prey Falcon versus grouse: flight adaptations of a predator and its prey
Several falcons were trained to fly along a 500 m course to a lure. The air speeds of the more consistent performers averaged about 1.5 times their calculated minimum power speeds, and occasionally reached 2.1 times the minimum power speed. Wing beat frequencies of all the falcons were above those estimated from earlier field observations, and the same was true of wild Sage Grouse...
Authors
C.J. Pennycuick, M.R. Fuller, J.J. Oar, S.J. Kirkpatrick
Observer differences in the North American Breeding Bird Survey Observer differences in the North American Breeding Bird Survey
Because count data collected in many bird surveys are only an index to population size, factors that can influence the counts must be identified and incorporated into analyses. Observer quality is often ignored in analyses of population changes from survey data, but observers differ in methods and capabilities and, hence, tend to count different numbers of birds. We assess the...
Authors
J.R. Sauer, B.G. Peterjohn, W.A. Link
Population status and trends of grouse and prairie-chickens from the North American Breeding Bird Survey and Christmas Bird Count Population status and trends of grouse and prairie-chickens from the North American Breeding Bird Survey and Christmas Bird Count
No abstract available.
Authors
J.R. Sauer, Sandra Orsillo, B.G. Peterjohn
The 1992 and 1993 summary of the North American Breeding Bird Survey The 1992 and 1993 summary of the North American Breeding Bird Survey
Using data from the North American Breeding Bird Survey (BBS), continental and regional changes in bird populations were estimated for the 2-year periods of 1991-1992 and 1992-1993. These 2-year changes were placed in the context of population trends since 1966. During 1991-1992, 62% of all species exhibited positive continental trend estimates. For species showing significant population...
Authors
B.G. Peterjohn, J.R. Sauer, W.A. Link
Metals in diet of Bering Sea walrus: Mya sp. as a possible transmitter of elevated cadmium and other metals Metals in diet of Bering Sea walrus: Mya sp. as a possible transmitter of elevated cadmium and other metals
Elevated levels of cadmium in Pacific walrus (Odobenus rosmarus divergens) and northern fur seals (Callorhinus ursinus) have been reported in populations from the Bering Sea (Goldblatt & Anthony, 1983; Taylor et al., 1989). Russian and US authorities are concerned because of the possible health hazards from consuming pinniped meat harvested for subsistence peoples. The effects of cadmium...
Authors
A. Keith Miles, Susan Hills
Relation among cytochrome P450, AH-active PCB congeners and dioxin equivalents in pipping black-crowned night-heron embryos Relation among cytochrome P450, AH-active PCB congeners and dioxin equivalents in pipping black-crowned night-heron embryos
Pipping black-crowned night-heron (Nycticorax nycticorax) embryos were collected from a relatively uncontaminated site (next to Chincoteague National Wildlife Refuge, VA) and three polluted sites (Cat Island, Green Bay, Lake Michigan, WI; Bair Island, San Francisco Bay, CA; West Marin Island, San Francisco Bay, CA). Hepatic cytochrome P-450-associated monooxygenases and cytochrome P-450...
Authors
Barnett A. Rattner, Jeff S. Hatfield, M. J. Melancon, T. W. Custer, D. E. Tillitt