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: 41778
Endocrine correlates of reproduction in the wolf. I. Serum progesterone, estradiol and LH during the estrous cycle
The estrous cycle of 10 intact female wolves, aged 8 months-8 years at the initiation of the study, was characterized in terms of vaginal smears, behavioral observations and serum concentrations of estradiol-17β, progesterone and luteinizing hormone (LH) from January through June. No estrous cycles occurred in these animals between June and December. All were housed with male wolves. Two pups and
Authors
U. S. Seal, E.D. Plotka, J.M. Packard, L. D. Mech
Embryotoxic and teratogenic effects of petroleum hydrocarbons in mallards (Anas platyrhynchos)
Egg surface applications of microliter quantities of crude and refined oils of high aromatic content are embryotoxic to mallards (Anas platyrhynchos) and other avian species; applications of aliphatic hydrocarbons have virtually no effect. Mallard eggs at 72 h of development were exposed to a mixture of aromatic hydrocarbons or to aromatic compounds representative to those present in crude oil to
Authors
D. J. Hoffman
Bone development in black ducks as affected by dietary toxaphene
Black ducks, Anas rubripes, were exposed to dietary toxaphene concentrations of 0, 10, or 50 μg/g of food for 90 days prior to laying and through the reproductive season. Toxaphene did not affect reproduction or survival, but reduced growth and impaired backbone development in ducklings. Collagen, the organic matrix of bone, was decreased significantly in cervical vertebrae of ducklings fed 50 μg/
Authors
P. M. Mehrle, M. T. Finley, J. L. Ludke, F.L. Mayer, T. E. Kaiser
Response of breeding birds to aerial sprays of trichlorfon (Dylox) and carbaryl (Sevin-4-Oil) in Montana forests
Breeding density, food, nesting success, and mortality of 20 bird species were monitored at Beaverhead National Forest, Montana, in 1975 in conjunction with experimental applications of trichlorfon (Dylox) and carbaryl (Sevin-4-oil) to western budworms (Choristoneura occidentalis). Bird species on nine 350- to 550-ha forested plots (three controls and three treated with each pesticide) were studie
Authors
L.R. DeWeese, C. J. Henny, R.L. Floyd, K.A. Bobal, A.W. Schultz
Exposure of waterfowl to lead: A nationwide survey of residues in wing bones of seven species, 1972-73
No abstract available.
Authors
R.C. Stendell, R.I. Smith, K.P. Burnham, R. E. Christensen
The technical literature on the American woodcock, 1927-1978
No abstract available.
Authors
T.J. Dwyer, R.A. Coon, P.H. Geissler
Effects of sevin-4-oil, dimilin, and orthene on forest birds in northeastern Oregon
The possible harmful effect of insecticides on nontarget organisms should be a prominent concern in all attempts to control forest pests. Although all wildlife must be considered, birds are particularly vulnerable. The study reported here was part of the effort to find an environmentally safe method to control one of the major sources of insect damage to forest trees - the Douglas-fir tussock moth
Authors
M.L. Richmond, C. J. Henny, R.L. Floyd, R.W. Mannan, D.M. Finch, L.R. DeWeese