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
Growth rates of great egret, snowy egret and black-crowned night-heron chicks Growth rates of great egret, snowy egret and black-crowned night-heron chicks
Growth rates of Great Erget (Casmerodius albus), Snowy Erget (Egretta thula), and Black-crowned Night-Heron (Nycticorax nycticorax) chicks to 18 days-of-age were estimated from repeated measurements of chicks in broods of three young. Weight gain (g/day) or increase in length (mm/day) of forearm, tarsus, or culmen did not between Black-crowned Night-Heron chicks at a colony in Rhode...
Authors
T. W. Custer, D.W. Peterson
A vacuum-operated pore-water extractor for estuarine and freshwater sediments A vacuum-operated pore-water extractor for estuarine and freshwater sediments
A vacuum-operated pore-water extractor for estuarine and freshwater sediments was developed and constructed from a fused-glass air stone attached with aquarium airline tubing to a 30 or 60 cc polypropylene syringe. Pore water is extracted by inserting the air stone into the sediment and creating a vacuum by retracting and bracing the syringe plunger. A hand-operated vacuum pump attached...
Authors
Parley V. Winger, Peter J. Lasier
Ethyl parathion in wetlands following aerial application to sunflowers in North Dakota Ethyl parathion in wetlands following aerial application to sunflowers in North Dakota
An operational aerial application of parathion to sunflower fields resulted in greater or equal spray deposit in wetlands adjacent to or surrounded by sunflower fields than in the sunflower fields. In another application, when the applicator attempted to avoid contamination of the wetlands, parathion still drifted into wetlands in detectable amounts; in 2 of 4 comparisons, spray deposit...
Authors
M.W. Tome, C.E. Grue, L.R. DeWeese
Social organization in deer: Implications for localized management Social organization in deer: Implications for localized management
Populations of white-tailed deer (Odocoileus virginianus) inhabiting many state and national parks and suburban areas have grown to the point that they conflict with human activities. Conflicts range from destruction of vegetation through browsing to public perception that diseases carried by deer pose threats to human health. Traditional modes of hunting to control populations are...
Authors
W.F. Porter, N.E. Mathews, H.B. Underwood, R.W. Sage, D.F. Behrend
The distributional patterns of reptiles and amphibians in the Mariana Islands The distributional patterns of reptiles and amphibians in the Mariana Islands
No abstract available.
Authors
G.H. Rodda, T. H. Fritts, J. Reichel
Movements and survival of American black duck and mallard broods on Chesapeake Bay Movements and survival of American black duck and mallard broods on Chesapeake Bay
We attached radio transmitters to day-old American black duck (Anas rubripes) and mallard (A. platyrhynchos) ducklings and monitored duckling habitat use, brood movements, and survival rates for 30 days. Ducklings moved an average of 2.3 km within the first 24 hours and another 1.5 km thereafter. After the initial move, broods usually moved once more. No differences in initial movement...
Authors
D.G. Krementz, G.W. Pendleton
Estimates of movement and site fidelity using mark-resight data of wintering Canada geese Estimates of movement and site fidelity using mark-resight data of wintering Canada geese
Population ecologists have devoted disproportionate attention to the estimation and study of birth and death rates and far less effort to rates of movement. Movement and fidelity to wintering areas have important ecological and evolutionary implications for avian populations. Previous inferences about movement among and fidelity to wintering areas have been restricted by limitations of...
Authors
J.B. Hestbeck, J.D. Nichols, R.A. Malecki
Winter nutrition and population ecology of white-tailed deer in the central Superior National Forest Winter nutrition and population ecology of white-tailed deer in the central Superior National Forest
No abstract available.
Authors
G. D. DelGiudice, M.E. Nelson, L.D. Mech
Herons and egrets as proposed indicators of estuarine contamination in the United States Herons and egrets as proposed indicators of estuarine contamination in the United States
The National Contaminant Biomonitoring Program of the U.S. Fish and Wildlife Service Includes the sampling of freshwater fish, starlings, and duck wings. In order to include an estuarine component, herons and egrets are being evaluated. Organochlorine concentrations were measured In eggs and chicks of Snowy Egrets Egretta thula, Great Egrets Casmerodius albus, and Black-crowned Night...
Authors
T. W. Custer, Barnett A. Rattner, H. M. Ohlendorf, M. J. Melancon
Effects of contaminants on birds Effects of contaminants on birds
No abstract available.
Authors
G. H. Heinz, Stanley N. Wiemeyer
Biological variability and the influence of stress on cholinesterase activity Biological variability and the influence of stress on cholinesterase activity
No abstract available.
Authors
Barnett A. Rattner, A. Fairbrother
Demography of eastern population tundra swans, Cygnus columbianus columbianus Demography of eastern population tundra swans, Cygnus columbianus columbianus
No abstract available.
Authors
J. Bart, R. Limpert, S. Earnst, W. Sladen, J.E. Hines, T. Rothe