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: 41918
Some physiological consequences of handling stress in the juvenile coho salmon (Oncorhynchus kisutch) and steelhead trout (Salmo gairdneri)
The stress of handling juvenile coho salmon (Oncorhynchus kisutch) and steelhead trout (Salmo gairdneri) in soft water and in water with added salts was evaluated using blood and tissue chemistry fluctuations as indices of metabolic and endocrine function. Changes in plasma glucose, chloride, calcium, and cholesterol levels indicated that significant osmoregulatory and metabolic dysfunctions can o
Authors
Gary Wedemeyer
Studies on selected myxobacteria pathogenic for fishes and on bacterial gill disease in hatchery-reared salmonids
No abstract available at this time
Authors
G. L. Bullock
Vegetation of prairie potholes, North Dakota, in relation to quality of water and other environmental factors
Measurements of specific conductance provide an adequate indication of the average salinity of surface waters in natural ponds and lakes of the northern .prairie region. Yearly and seasonal variations in specific conductance were much greater in brackish and subsaline wetlands than in fresh-water areas. The principal vegetational types. Land-use practices of varying brackish to saline wetlands wer
Authors
R. E. Stewart, H.A. Kantrud
Studies on selected myxobacteria pathogenic for fishes and on bacterial gill disease in hatchery-reared salmonids
No abstract available.
Authors
G. L. Bullock
Aerial surveys of waterfowl production in North America, 1955-71
No abstract available.
Authors
Charles J. Henny, David R. Anderson, Richard S. Pospahala
Review of literature on the endangered masked bobwhite
The masked bobwhite (Colinus virginianus ridgwayi) once inhabited restricted areas in southern Arizona and middle Sonora, Mexico. It probably never was a widespread and abundant bird. Ornithologists discovered this race in 1884, presumably during its final decline in Arizona due to overgrazing and a series of droughts. . It was gone from Arizona by 1900. Apparently the bird was not seriously threa
Authors
Roy E. Tomlinson
Population ecology of the mallard: I. A review of previous studies and the distribution and migration from breeding areas
This report, the first of a series of reports on a comprehensive analysis of population data on the? millIard at? the continental level, provides background information including a review of the history of waterfowl management and a resume of previous studies of the mallard. The breeding range of the mallard was subdivided into 16 major and 44 minor reference areas. Each area is discussed in terms
Authors
David R. Anderson, Charles J. Henny
Reproductive patterns in captive American kestrels (sparrow hawks)
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 at a latitude farther south of their normal breeding range than did those from the Nor
Authors
Richard D. Porter, Stanley N. Wiemeyer
DDE at low dietary levels kills captive American kestrels
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 males which were sacrificed after 12 to 16 months on dosage. Autopsies of the two birds compared with autopsies of the sacri
Authors
Richard D. Porter, Stanley N. Wiemeyer
Eggshell Thinning and DDE (Reply)
No abstract available.
Authors
Stanley N. Wiemeyer, Richard D. Porter
The sandhill crane with emphasis on aspects related to North Dakota
No abstract available.
Authors
D. H. Johnson, R. E. Stewart
Residues of organochlorine pesticides, polychlorinated biphenyls, and mercury and autopsy data for bald eagles, 1969 and 1970
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 frequently. Six eagles contained possible lethal levels of
Authors
Andre A. Belisle, William L. Reichel, Louis N. Locke, Thair Lamont, Bernard M. Mulhern, Richard M. Prouty, Robert B. DeWolf, Eugene Cromartie