Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41764
Effect of mercuric chloride feeding on sexual maturity, egg production and fertility in Japanese quail
Japanese quail (Coturnix c. japonica) were fed 0, 8, 16 or 32 p.p.m. of mercury as mercuric chloride from 3 days of age through 20 weeks of age. The onset of egg production generally occurred earlier for hens fed HgCl2. Average age in days at first oviposition for the control, 8 p.p.m., 16 p.p.m. and 32 p.p.m. was 48.4, 50.9, 46.9 and 44.0 respectively. The average rate of egg productivity from
Authors
E. F. Hill, C.S. Shaffner
Sea birds wintering off Maryland shores, 1972-73
During the winter of 1972-73, studies were conducted to determine the status and distribution of pelagic species of birds occurring at sea as far as 38 miles east of Ocean City, Md. The wintering off-shore avifauna was found to be impressively rich in variety of species and numbers of individuals. Sightings included Fulmar and Skua, both first sight records for Maryland. Large alcids, especiall
Authors
R.A. Rowlett
Two new diving duck hosts for Plasmodium circumflexum
No abstract available.
Authors
R. M. Kocan, J.O. Knisley
Effect of salt on the response of birds to sucrose
The preference of male red-winged blackbirds for solutions of sucrose and sucrose with 0.03 M sodium chloride was tested, using a two-bottle choice test. Preliminary experiments demonstrated that the birds were indifferent to 0.03 M NaCl in water. Both control and experimental animals exhibited indifference to the solutions at the lowest concentration and aversion at the highest. The data sugge
Authors
J.G. Rogers, O. Maller
Re-evaluation of some Montana bird records
No abstract available.
Authors
P.D. Skaar, R. B. Clapp, R.C. Banks
The seventy-third Christmas bird count. 327. Little Creek, Va
No abstract available.
Authors
P. Sykes
The seventy-third Christmas bird count. 314. Back Bay National Wildlife Refuge, Va
No abstract available.
Authors
P. Sykes
Organochlorine residues in woodcock wings, 11 states--1970-71
A survey of organochlorine residues in woodcock wings was undertaken to determine whether these wings are suitable for showing regional differences in residues and to obtain a baseline in 1970-71 for later comparisons. Woodcock wings were obtained from the annual hunter's wing survey. Samples came from eight States (Louisiana, Maine, Michigan, New Hampshire, New Jersey, New York, Pennsylvania, and
Authors
M. A. R. McLane, L. F. Stickel, E.R. Clark, D.L. Hughes
Organochlorines, heavy metals, and the biology of North American accipiters
Analyses of eggs of three species of North American accipitrine hawks for organochlorines and heavy metals indicate that contamination with DDE may be the primary cause of recent population declines of two of the species, Cooper's hawk and sharp-shinned hawk.
Authors
N.F.R. Snyder, Hollice A. Snyder, J.L. Lincer, R.T. Reynolds