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: 41763
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
Lake Erie: Effects of exploitation, environmental changes and new species on the fishery resources
In no other lake as large as Lake Erie (surface area, 25,690 km2) have such extensive changes taken place in the drainage basin, the lake environment, and the fish populations over the last 100 years. Deforestation and prairie burning led to erosion and siltation of valuable spawning grounds. Marsh spawning areas were drained. Lake-to-river spawning migrations were blocked by mill dams. Accelerate
Authors
Wilbur L. Hartman
Book Review: Check list of helminth parasites of African fishes by L. F. Khalil
In spite of the fact that freshwater covers about 74,000 square miles of Africa, surprisingly little work has been done on the helminth parasites of African fishes.
Authors
G. L. Hoffman
Current status of the endangered masked bobwhite quail
No abstract available.
Authors
R. E. Tomlinson
California condor survey, 1971
No abstract available.
Authors
W.D. Carrier, R.D. Mallette, S. Wilbur, J.C. Borneman
The seventy-second Christmas bird count. 296. Ocean City, Md
No abstract available.
Authors
C.S. Robbins