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
The role of observer bias in the North American Breeding Bird Survey The role of observer bias in the North American Breeding Bird Survey
Ornithologists sampling breeding bird populations are subject to a number of biases in bird recognition and identification. Using Breeding Bird Survey data, these biases are examined qualitatively and quantitatively, and their effects on counts are evaluated. Differences in hearing ability and degree of expertise are the major observer biases considered. Other, more subtle influences are...
Authors
C. A. Faanes, D. Bystrak
Metals and terrestrial earthworms (Annelida: Oligochaeta) Metals and terrestrial earthworms (Annelida: Oligochaeta)
The toxicity of metals to earthworms and the residues of metals found in earthworms are reviewed. Meta 1 concentrations are rarely high enough to be toxic to worms, but copper may reduce populations in orchards heavily treated with fungicides and in soil contaminated with pig wastes. The metals in some industrial sewage sludges may interfere with using sludge in vermiculture. Storage...
Authors
W. N. Beyer
Breeding habit of the toad Bufo coccifer in Costa Rica, with a description of the tadpole 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...
Authors
R.W. McDiarmid, M.S. Foster
Gas-liquid chromatographic and gas-liquid chromatographic-mass spectrometric determination of fenvalerate and permethrin residues in grasshoppers and duck tissue samples Gas-liquid chromatographic and gas-liquid chromatographic-mass spectrometric determination of fenvalerate and permethrin residues in grasshoppers and duck tissue samples
A procedure is described for determining fenvalerate and permethrin residues in grasshoppers and duck tissues. Samples are Soxhlet-extracted with hexane and cleaned up by gel permeation chromatography with an in-line alumina column. Samples are analyzed by gas-liquid chromatography with electron capture detection, and confirmed by gas-liquid chromatography-mass spectrometry. The average...
Authors
W. L. Reichel, E. J. Kolbe, C. J. Stafford
A review of bufflehead sex and age criteria with notes on weights A review of bufflehead sex and age criteria with notes on weights
Summary: Buftleheads Bucephala albeola were collected along the Oregon coast during the hunting season. Birds were first sexed and aged upon cloacal and internal characteristics. Results were then compared with data derived from wing plumage. A small change was made in Carney's (1964) wing plumage key to improve its accuracy. Although only a few studies have been made of Bufflehead...
Authors
Charles J. Henny, J.L. Carter, Barbara J. Carter
Colony site dynamics and habitat use in Atlantic coast seabirds Colony site dynamics and habitat use in Atlantic coast seabirds
Seabird colony sizes and movements were documented in the DelMarVa coastal region in 1976-1977 and in New Jersey in 1978-1979. Most colonies were found on marsh and dredge deposition islands and on barrier island beaches. For the "traditionally" beach-nesting Herring Gull, Common Tern, and Black Skimmer, larger, more stable colonies were found on barrier beaches than on marsh islands. In...
Authors
R.M. Erwin, J. Galli, J. Burger
[Comments on] 'A windshield and multivariate approach to the classification, inventory, and evaluation of wildlife habitat: An exploratory study,' by C.E. Grue, R.R. Reid, and N.J. Silvy [Comments on] 'A windshield and multivariate approach to the classification, inventory, and evaluation of wildlife habitat: An exploratory study,' by C.E. Grue, R.R. Reid, and N.J. Silvy
No abstract available.
Authors
P.H. Geissler
PCBs and organochlorine pesticides in wild mink and river otters from Oregon PCBs and organochlorine pesticides in wild mink and river otters from Oregon
Mink (Mustela vison) and river otters (Lutra canadensis) collected during the 1978-1979 trapping season in Oregon were analyzed for organochlorine pesticide and polychlorinated biphenyl (PCB) residues. PCB residues were most frequently encountered in both species from the Lower Columbia River. PCB residues in 6 of 9 Columbia River mink livers were as high as those reported in livers of
Authors
Charles J. Henny, L. J. Blus, S.V. Gregory, C. J. Stafford
Reducing bird count variability by training observers Reducing bird count variability by training observers
No abstract available.
Authors
C. B. Kepler, J. M. Scott
Synthesis and Evaluation of Avian Population and Habitat Data for West Virginia Synthesis and Evaluation of Avian Population and Habitat Data for West Virginia
No abstract available.
Authors
S.H. Anderson, C.S. Robbins, J.R. Partelow
Whale sharks associated with fish schools off south Texas Whale sharks associated with fish schools off south Texas
No abstract available.
Authors
W. Hoffman, T. H. Fritts, R.P. Reynolds