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

184918 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 6277, results 156901 - 156925

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Reproductive patterns in captive American kestrels (sparrow hawks)
Richard D. Porter, Stanley N. Wiemeyer
1972, Condor (74) 46-53
Female kestrels acquired in Florida in winter as full-grown birds began laying eggs a month later than did those acquired as nestlings from northeastern United States. Egg laying dates of the two groups did not overlap in 1966 through 1968. The later nesting Florida-wintering females may have nested in captivity...
Residues of organochlorine pesticides, polychlorinated biphenyls, and mercury in bald eagle eggs and changes in shell thickness--1969 and 1970
Stanley N. Wiemeyer, B.M. Mulhern, F.J. Ligas, R.J. Hensel, J.E. Mathisen, F.C. Robards, S. Postupalsky
1972, Pesticides Monitoring Journal (6) 50-55
Twenty-three bald eagle eggs collected in Alaska, Maine, Michigan, Minnesota, and Florida during 1969 and 1970 were analyzed for organochlorine pesticides, polychlorinated biphenyls, and mercury. All eggs contained residues of DDE, dieldrin, PCB's, and mercury. Average residue concentrations were lowest in eggs from Alaska. Significant eggshell thinning...
Egg measurements for three endangered species
J.D. Stephenson, G. Smart
1972, The Auk (89) 191-192
From 1967 through 1969, external dimensions of the eggs of three endangered species of birds were measured. Included were 33 eggs of the Whooping Crane (Grus americana), 158 eggs of the Aleutian Canada Goose (Branta canadensis leucopareia), and 809 eggs of the Masked Bobwhite Quail (Colinus virginiana ridgwayi). In the...
DDE at low dietary levels kills captive American kestrels
Richard D. Porter, Stanley N. Wiemeyer
1972, Bulletin of Environmental Contamination and Toxicology (8) 193-199
Two of 14 male American kestrels died after 14 and 16 months on a diet containing 2.8 p.p.m., wet weight, p, p'-DDE. The brains of the two birds contained DDE residues of 213 and 301 p.p.m. compared with 14.9 p.p.m. (range, 4.47-26.6 p.p.m.) (wet weights) for 11 of the adult...
Residues of organochlorine pesticides, polychlorinated biphenyls, and mercury and autopsy data for bald eagles, 1969 and 1970
Andre A. Belisle, William L. Reichel, Louis N. Locke, Thair Lamont, Bernard M. Mulhern, Richard M. Prouty, Robert B. DeWolf, Eugene Cromartie
1972, Pesticides Monitoring Journal (6) 133-138
Thirty-nine bald eagles found sick or dead in 13 States during 1969 and 1970 were analyzed for pesticide residues. Residues of DDE, dieldrin, polychlorinated biphenyls (PCB's), and mercury were detected in all bald eagle carcasses; DDD residues were detected in 38; DDT, heptachlor epoxide, and dichlorobenzophenone (DCBP) were detected less...
Proceedings of the eighty-ninth stated meeting of the American Ornithologists' Union
Richard C. Banks
1972, The Auk (89) 156-170
The Eighty-ninth Stated Meeting of the American Ornithologists' Union was held 30 August-3 September 1971 at Seattle, Washington, under the sponsorship of the University of Washington. Business sessions and social activities were held in the Student Union Building and the University Tower Hotel; papers sessions were held in the...
Logarithmic relationship of DDE residues to eggshell thinning
L. J. Blus, C.D. Gish, A. A. Belisle, R. M. Prouty
1972, Nature (235) 376-377
A concentration-effect relationship seems to exist between DDE in eggs and shell thinning. It seems to follow a mathematically similar pattern in different species though it seems to operate at different levels....