Publications
This is a list of publications written by Patuxent employees since Patuxent opened in 1939. To search for Patuxent's publications by author or title, please click below to go to the USGS Publication Warehouse.
Filter Total Items: 8128
Variation in reproductivity with age in the brown pelican Variation in reproductivity with age in the brown pelican
About 10% of the Brown Pelicans breeding in South Carolina are in immature plumage. In comparison to adult breeders, immatures nested later, laid a smaller clutch, nested more frequently in low ground that was flooded, lost a larger proportion of nestlings, and produced fewer downy young per nest. Factors such as experience in breeding and fishing success probably influence reproductive...
Authors
Lawrence J. Blus, Julie A. Keahey
Uptake and retention of dietary cadmium in mallard ducks Uptake and retention of dietary cadmium in mallard ducks
Adult mallard ducks fed 0, 2, 20, or 200 ppm of cadmium chloride in the diet were sacrificed at 30-day intervals and tissues were analyzed for cadmium. No birds died during the study and body weights did not change. The liver and kidney accumulated the highest levels of cadmium. Tissue residues were significantly correlated in all treatment groups and residues increased with treatment...
Authors
Donald H. White, M. T. Finley
Herons and their allies: Atlas of Atlantic Coast colonies, 1975 and 1976 Herons and their allies: Atlas of Atlantic Coast colonies, 1975 and 1976
No abstract available.
Authors
R. G. Osborn, T. W. Custer
Marine and coastal birds Marine and coastal birds
No abstract available.
Authors
M.A. Howe, R. B. Clapp, J.S. Weske
Feeding habitat use by colonially-breeding herons, egrets, and ibises in North Carolina Feeding habitat use by colonially-breeding herons, egrets, and ibises in North Carolina
Nine species of herons, egrets, and ibises were followed by airplane from a nesting colony near Beaufort, North Carolina to their feeding sites. Except for Cattle Egrets, which flew exclusively to fields and dumps, the birds flew mainly to saltmarsh habitat. The selection of feeding habitats by Great Egrets and Louisiana Herons was directly related to tidal depth. The Great Egret was the...
Authors
Thomas W. Custer, Ronald G. Osborn
The seventy-eighth Audubon Christmas bird count. 371. Southern Dorchester County, Md The seventy-eighth Audubon Christmas bird count. 371. Southern Dorchester County, Md
No abstract available.
Authors
C.S. Robbins
Embryotoxic effects of crude oil in mallard ducks and chicks Embryotoxic effects of crude oil in mallard ducks and chicks
Recent studies in this laboratory have revealed that surface applications of microliter amounts of some crude and fuel oils that coat less than 10% of the egg surface reduce hatching considerably in different avian species. Applications of paraffin compounds that coat equal areas of the egg surface do not reduce hatching suggesting that toxicity is due to causes other than asphyxia. In...
Authors
David J. Hoffman