Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16784
Whale sharks associated with fish schools off south Texas
No abstract available.
Authors
W. Hoffman, T. H. Fritts, R.P. Reynolds
Breeding habit of the toad Bufo coccifer in Costa Rica, with a description of the tadpole
The breeding habits of Bufo coccifer were studied in northwestern Costa Rica between 1971 and 1974. This species breeds during the rainy season, at least from May through August. Males chorus from areas of shallow water. Their calls resemble those of Mexican representatives of the species in pulse rate and duration, but are closer to those of other Costa Rican and Panamanian populations in dominan
Authors
R.W. McDiarmid, M.S. Foster
Thirty-third winter bird-population study. 5. Upland tulip-tree--maple--oak forest
No abstract available.
Authors
C.S. Robbins
Chesapeake Bay most important wintering area for canvasback duck
No abstract available.
Authors
M. C. Perry
Forty-fourth breeding bird census. 10. Upland tulip-tree--maple--oak forest
No abstract available.
Authors
C.S. Robbins
Some effects of environmental pollutants on endocrine regulatory mechanisms
No abstract available.
Authors
W. N. Holmes, J. Gorsline, K.P. Cavanaugh
Management of waterfowl during severe weather
No abstract available.
Authors
R.E. Kirby, Fred Ferrigno
Plasma corticosterone and thyroxine concentrations during chronic ingestion of crude oil in mallard ducks (Anas platyrhynchos)
1. Blood samples were collected from mallard ducks after 6, 12, and 18 weeks of dietary exposure to mash containing 0.015%, 0.150%, and 1.500% crude oil.2. Plasma corticosterone concentrations in ducks fed mash containing 0.150% or 1.500% Alaskan Prudhoe Bay crude oil were uniformly depressed when compared to values in untreated control birds.3. Plasma thyroxine concentration was not altered in du
Authors
Barnett A. Rattner, W. C. Eastin
The structure of western warbler assemblages: Analysis of foraging behavior and habitat selection in Oregon
This study examines the foraging behavior and habitat selection of a MacGillivray's (Oporornis tolmiei)-Orange-crowned (Vermivora celata)-Wilson's (Wilsonia pusilla) warbler assemblage that occurred on early-growth clearcuts in western Oregon during breeding. Sites were divided into two groups based on the presence or absence of deciduous trees. Density estimates for each species were nearly ident
Authors
Michael L. Morrison
Parental development of Eimerian coccidia in sandhill and whooping cranes
In contrast with isosporoid species of coccidia that have established extraintestinal phases of development, the eimeriids, except for a few species, generally have been considered inhabitants of the intestinal tract. Eimeria infection in sandhill cranes (Grus canadensis) and whooping cranes (G. americana) may result in disseminated visceral coccidiosis. Nodules were observed in the oral cavity of
Authors
M.N. Novilla, J. W. Carpenter, T.R. Spraker, T.K. Jeffers