Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16743
Aspects of hatching success and chick survival in Gull-billed Terns in coastal Virginia Aspects of hatching success and chick survival in Gull-billed Terns in coastal Virginia
Because of a long-term population decline in Gull-billed Terns (Sterna nilotica) nesting along the coast of Virginia, we began a three year study in 1994 to monitor hatching success and survival of Gull-billed Tern chicks at several Virginia colony sites. Colonies were located on either small, storm-deposited shellpiles along marsh fringes or large, sandshell overwash fans of barrier...
Authors
T.B. Eyler, R.M. Erwin, Daniel B. Stotts, Jeff S. Hatfield
On the decline of the Rusty Blackbird and the use of ornithological literature to document long-term population trends On the decline of the Rusty Blackbird and the use of ornithological literature to document long-term population trends
Unlike most North American blackbirds, Rusty Blackbirds (Euphagus carolensis) have shown steep population declines. Declines of approximately 90% are indicated for three recent decades from the Breeding Bird Survey, Christmas Bird Counts, and Quebec Checklist Program. Analyses of abundance classifications in bird distribution books and annotated checklists reveal an overlooked but long...
Authors
R. Greenberg, Sam Droege
Identification of in vitro cytochrome P450 modulators to detect induction by prototype inducers in the mallard duckling (Anas platyrhynchos Identification of in vitro cytochrome P450 modulators to detect induction by prototype inducers in the mallard duckling (Anas platyrhynchos
Seven modulators of mammalian monooxygenase activity were screened for their ability to selectively stimulate or inhibit in vitro monooxygenase activities of hepatic microsomes from mallard ducklings treated with phenobarbital, β-naphthoflavone, 3,3′,4,4′,5-pentachlorobiphenyl or vehicle. Microsomes were assayed fluorometrically for four monooxygenases: benzyloxy-, ethoxy-, methoxy-, and
Authors
A.E. Renauld, M. J. Melancon, L.M. Sordillo
Temporal differences in point counts of bottomland forest landbirds Temporal differences in point counts of bottomland forest landbirds
We compared number of avian species and individuals in morning and evening point counts during the breeding season and during winter in a bottomland hardwood forest in west-central Mississippi. USA. In both seasons, more species and individuals were recorded during morning counts than during evening counts. We also compared morning and evening detections for 18 species during the...
Authors
W.P. Smith, D.J. Twedt
Review of a natural thiamine deficiency causing reproductive failure in feral salmonid species of the Great Lakes Review of a natural thiamine deficiency causing reproductive failure in feral salmonid species of the Great Lakes
No abstract available at this time
Authors
D. C. Honeyfield, D. E. Tillitt, S.B. Brown, J.D. Fitzsimons
Characterizing backcountry camping impacts in Great Smoky Mountains National Park Characterizing backcountry camping impacts in Great Smoky Mountains National Park
This investigates resource impacts on backcounty campsites in the Great Smoky Mountains National Park, USA. Study objectives were to enhance our understanding of camping impacts and to improve campsite impact assessment procedures by means of multivariate techniques. Three-hundred and eight campsites at designated backcountry campgrounds, and 69 additional unofficial campsites were...
Authors
Y.-F. Leung, J. L. Marion
Trash-caused mortality in Mongolian raptors Trash-caused mortality in Mongolian raptors
On four expeditions (1994, 1995, 1997, and 1998) through Mongolia, we found two kinds of mortality associated with trash gathered by parent raptors as part of the nest building process. Our observations of actual mortality were limited to three species: the golden eagle (Aquila chrysaetos) (2 clutches of eggs), the saker falcon (Falco cherrug) (4 nestlings), and the upland buzzard (Buteo
Authors
D. H. Ellis, J.W. Lish
Habitat use by juvenile channel catfish and flathead catfish in lotic systems in Alabama Habitat use by juvenile channel catfish and flathead catfish in lotic systems in Alabama
No abstract available.
Authors
E.R. Irwin, Mary C. Freeman, K.M. Costley
Geologic mapping of the nearshore area offshore of Fire Island, New York Geologic mapping of the nearshore area offshore of Fire Island, New York
No abstract available.
Authors
W. C. Schwab, E.R. Thieler, J.R. Allen, D.S. Foster, B.A. Smith, J. F. Denny, W. W. Danforth
Organochlorine contaminants and Tree Swallows along the Fox River and Green Bay, Wisconsin, USA Organochlorine contaminants and Tree Swallows along the Fox River and Green Bay, Wisconsin, USA
Green Bay, Wisconsin is contaminated with polychlorinated biphenyls (PCBs) however, whether these contaminants affect reproduction in insectivorous birds is unknown. Tree Swallows, Tachycineta bicolor, are secondary cavity nesters that will nest in boxes and tolerate handling. Because Tree Swallows are aquatic insectivores, residues in their tissues are primarily indicative of...
Authors
Christine M. Custer, T. W. Custer, P. David Allen, K. L. Stromborg, M. J. Melancon
Population status of North American grassland birds from the North American Breeding Bird Survey Population status of North American grassland birds from the North American Breeding Bird Survey
We summarize population trends for grassland birds from 1966 to 1996 using data from the North American Breeding Bird Survey. Collectively, grassland birds showed the smallest percentage of species that increased of any Breeding Bird Survey bird group, and population declines prevailed throughout most of North America. Although 3 grassland bird species experienced significant population
Authors
B. Peterjohn, J.R. Sauer
On the importance of controlling for effort in analysis of count survey data: Modeling population change from Christmas Bird Count data On the importance of controlling for effort in analysis of count survey data: Modeling population change from Christmas Bird Count data
Count survey data are commonly used for estimating temporal and spatial patterns of population change. Since count surveys are not censuses, counts can be influenced by 'nuisance factors' related to the probability of detecting animals but unrelated to the actual population size. The effects of systematic changes in these factors can be confounded with patterns of population change. Thus...
Authors
W.A. Link, J.R. Sauer