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
Two species of Simuliidae (Diptera), Cnephia ornithophilia and Prosimulium vernale, from Maryland Two species of Simuliidae (Diptera), Cnephia ornithophilia and Prosimulium vernale, from Maryland
The finding of Cnephia ornithophilia Davies, Peterson, & Wood and Prosimulium vernale Shewell for the first time at the Patuxent Wildlife Research Center, Laurel, Maryland, is described. Larvae of C. ornithophilia were collected Nov. 15, pupae Feb. 14, and adult flies Feb. 28. No immature or adult specimens were found between Apr. 2 and Nov. 14. The greatest number of immature stages was...
Authors
I.B. Tarshis, J.N. Stuht
DDE and DDD residues correlated with mortality of experimental birds DDE and DDD residues correlated with mortality of experimental birds
Nearly everywhere in nature are found DDE and DDD, which are metabolites of DDT, and they often become concentrated through food chains. DDD is also a commercial insecticide. large amounts of both are frequently found in birds, but the significance of these amounts has puzzled many owrkers. Studies at Clear Lake, California1 gave some data on DDD danger levels, but less is known of DDE...
Authors
William H. Stickel, Lucille F. Stickel, Francis B. Coon
The season - January, February, March, 1970 The season - January, February, March, 1970
No abstract available.
Authors
C.S. Robbins
The Wayne warbler in the Great Dismal Swamp The Wayne warbler in the Great Dismal Swamp
No abstract available.
Authors
B. Meanley
Organochlorine insecticide residues in soils and soil invertebrates from agricultural lands Organochlorine insecticide residues in soils and soil invertebrates from agricultural lands
Soils and earthworms and other soil invertebrates were collected from 67 agricultural fields in eight States. Samples were analyzed by gas chromatography for DDE, DDD, DDT, aldrin, dieldrin, endrin, heptachlor, heptachlor epoxide, and gamma-chlordane insecticides. Organochlorine insecticides in soils averaged 1.5 ppm, dry weight, and in earthworms, 13.8 ppm. Residues in earthworms...
Authors
C.D. Gish
A transmitting harness for small birds A transmitting harness for small birds
No abstract available.
Authors
G.A. Godfrey
Bronzed cowbird taken in Florida Bronzed cowbird taken in Florida
On 8 November 1968 in Gainesville, Florida, I removed a male Bronzed Cowbird (Tangavius a. aeneus) from a blackbird decoy trap containing a large number of Brown-headed Cowbirds (Malothrus ater). Oliver L. Austin, Jr., at the Florida State Museum, verified the species identification by noting the notched inner webs of the outer three primaries, a characteristic of the genus. The...
Authors
R.E. Matteson
Method of searching for food by the Swainson's warbler Method of searching for food by the Swainson's warbler
No abstract available.
Authors
B. Meanley
Correction of bias in belt transect studies of immotile objects Correction of bias in belt transect studies of immotile objects
Unless a correction is made, population estimates derived from a sample of belt transects will be biased if a fraction of, the individuals on the sample transects are not counted. An approach, useful for correcting this bias when sampling immotile populations using transects of a fixed width, is presented. The method assumes that a searcher's ability to find objects near the center of...
Authors
David R. Anderson, R.S. Pospahala
An international standard for a mapping method in bird census work recommended by the International Bird Census committee An international standard for a mapping method in bird census work recommended by the International Bird Census committee
No abstract available.
Authors
S. Svensson, K. Williamson, C. Ferry, A.H. Joensen, D. Lea, H. Oelke, C.S. Robbins