Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

164511 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 4927, results 123151 - 123175

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Factors affecting waterfowl breeding density and productivity estimates in the Northeast
J. R. Longcore, J.K. Ringelman
1980, Transactions of the Northeast Section of the Wildlife Society, Annual Fish and Wildlife Conference (37) 169-181
During 1977-79, information useful for making breeding pair and brood surveys was obtained while studying black duck (Anas rubripes) habitat selection and productivity in south-central Maine. Surveys should be initiated in relation to sunrise and sunset time. Morning versus evening counts, familiarity with the survey area, wetland dynamics of the...
Toxic effects of endrin and toxaphene on the southern leopard frog Rana sphenocephala
R.J. Hall, D. Swineford
1980, Environmental Pollution (Series A) (23) 53-65
Eggs, larvae and sub-adults of the southern leopard frog Rana sphenocephala were exposed to endrin and toxaphene. Exposure was in water by a continuous-flow technique, following standards that have been used successfully in the study of fish and invertebrates. R. sphenocephala is more sensitive to both pesticides than are higher vertebrates but is slightly...
Canine tooth wear in captive little brown bats
Donald R. Clark Jr.
1980, Acta Theriologica (25) 270-273
Upper canine teeth of little brown bats Myotis lucifugus lucifugus held in stainless steel wire mesh cages underwent severe wear which exceeded that observed previously in caged big brown bats, Eptesicus fuscus fuscus. This suggests a relationship between amount of wear and size of the caged bats with damage increasing...
Situation report: Heavy DDT contamination at Wheeler National Wildlife Refuge
W. James Fleming, T.Z. Atkeson
1980, Proceedings of the Annual Conference of the Southeastern Association of Fish and Wildlife Agencies (34) 453-461
A DDT manufacturing plant that operated on the Redstone Arsenal near Huntsville, Alabama discharged DDT-Iaden effluent from 1947 to 1970 into a creek on Wheeler National Wildlife Refuge. Seven to 9 years after the plant closed, high DDT, DDE, and DDD levels were reported in soils, river sediments, and fish...
Intestinal absorption of 5 chromium compounds in young black ducks (Anas rubripes)
W. C. Eastin Jr., S. D. Haseltine, H. C. Murray
1980, Toxicology Letters (6) 193-197
An in vivo intestinal perfusion technique was used to measure the absorption rates of five Cr compounds in black ducks. Cr was absorbed from saline solutions of KCr(SO4)2 and CrO3 at a rate about 1.5 to 2.0 times greater than from solutions of Cr, Cr(NO3)3, and Cr(C5H7O2)3. These results suggest the ionic...
On getting involved
Richard C. Banks
1980, The Auk (97) 637-638
The American Ornithologists' Union and its members had an early history of involvement in public affairs and conservation activities. A very active Committee on Bird Protection was among the first of the service committees to be established. In the 1880s it gathered data on the plumage trade and worked...
Lead residues in eastern tent caterpillars (Malacosoma americanum) and their host plant (Prunus serotina) close to a major highway
W. N. Beyer, John Moore
1980, Environmental Entomology (9) 10-12
Eastern tent caterpillars, Malacosoma americanum (F.) (Lepidoptera: Lasiocampidae), and leaves of their host plant, black cherry, Prunus serotina Ehrh., were collected in May, 1978, at various distances from the Baltimore-Washington Parkway, Prince George's Co., MD, and were analyzed for lead by atomic absorption spectrophotometry. Caterpillars collected within 10 m of the parkway contained 7.1–7.4...
Waterfowl production estimates on forested wetlands from pair and brood counts
R.E. Kirby
1980, Wildlife Society Bulletin (8) 273-278
Waterfowl pair and brood counts and estimates of total brood utilization were obtained from 10 beaver (Castor canadensis) flowages in north-central Minnesota and compared with rank correlation techniques. Summing the data for each species, correlation between pair and brood censuses was significant ( p = 0.8304, P < 0.025). Similarly,...
Organochlorine pollutants in small cetaceans from the Pacific and south Atlantic Oceans, November 1968-June 1976
T. J. O'Shea, R.L. Brownell Jr., D. R. Clark Jr., W.A. Walker, M. L. Gay, T. G. Lamont
1980, Pesticides Monitoring Journal (14) 35-46
Organochlorine residues were analyzed in blubber, brain, or muscle tissues of 69 individuals representing 10 species of small cetaceans. Collections were made from November 1968 through June 1976 at localities in the Eastern Tropical Pacific and along the coasts of California, Hawaii, Japan, and Uruguay, Relations of residue concentrations between...
Organochlorine and heavy metal residues in black duck eggs from the Atlantic Flyway, 1978
S. D. Haseltine, B.M. Mulhern, C. Stafford
1980, Pesticides Monitoring Journal (14) 53-57
Black duck (Anas rubripes) eggs were collected during 1978 in the Atlantic Flyway. One egg from each of 49 clutches was analyzed for organochlorine compounds and mercury. DDE was detected in 39 eggs, ranging from 0.09 ppm to 3.4 ppm, wet weight. DDE residues were highest in eggs from Delaware,...
Influence of a local source of DDT pollution on statewide DDT residues in waterfowl wings, northern Alabama, 1978-79
W. James Fleming, T. J. O'Shea
1980, Pesticides Monitoring Journal (14) 86-89
Heavy DDT contamination resulting from a former DDT manufacturing plant in northern Alabama has influenced statewide averages of DDT, DDE, and TDE residues in duck wings tested in the National Pesticide Monitoring Program. In states where contaminant levels in duck wings are high, residue analyses of wings categorized by finer...
Organochlorine residues and shell thickness in eggs of the clapper rail, common gallinule, purple gallinule, and limpkin (Class Aves), eastern and southern United States, 1972-74
Erwin E. Klaas, H. M. Ohlendorf, E. Cromartie
1980, Pesticides Monitoring Journal (14) 90-94
Organochlorine residues and shell thicknesses were surveyed in eggs of the clapper rail (Rallus longirostris), purple gallinule (Porphyrula martinica), common gallinule (Gallinula chloropas), and limpkin (Aramus guarauna) from the eastern and southern United States. Clapper rail eggs were collected during 1972-73 in New Jersey, Virginia, and South Carolina. During 1973-74,...
Hydrologic and land-cover features of the Loxahatchee River Basin, Florida
Benjamin F. McPherson, Maryann Sabanskas
1980, Water-Resources Investigations Report 80-1109
This map report represents the first published product of the Loxahatchee River estuary assessment, and primarily fulfills the first objective as outlined in the report. It presents an overview of the major physical features of the basin and presents selected information on the U.S. Geological Survey assessment. The report includes...
Selected reading in agricultural applications of small-format aerial photography
1980, Report
This collection of material has been assembled in response to a growing.interest in the use of low-cost, small-format aerial photography in the management of agricultural resources. Together, these articles serve to document the prevailing level of interest in the subject and provide an insight as to what can reasonably be...
Survey of resampling techniques using MSS and synthetic imagery
Brian P. Bauer
1980, Report
The objective of this survey is to investigate the methods of interpolation and deconvolution for image restoration The methods evaluated are nearest neighbor, bilinear interpolation, cubic convolution, and two-dimensional deconvolution. The effects of these restoration methods are demonstrated using Landsat multispectral scanner (MSS) data and synthetic imagery. The effect of these...
Establishment, survival, and growth of selected browse species in a ponderosa pine forest
D.R. Dietz, D.W. Uresk, H.E. Messner, L. C. McEwen
1980, Research Paper RM-219
Information is presented on establishment, survival, and growth of seven selected browse species in a ponderosa pine forest over a 10-year period. Methods of establishment included hand seeding and planting bare-root and containerized stock. Success of different methods differed with shrub species....
Coastal and Marine Bird Data Base
S.H. Anderson, P.H. Geissler, D.K. Dawson
1980, FWS/OBS 80/39
Summary: This report discusses the development of a coastal and marine bird data base at the Migratory Bird and Habitat Research Laboratory. The system is compared with other data bases, and suggestions for future development, such as possible adaptations for other taxonomic groups, are included....