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Publications

Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

Filter Total Items: 6057

Sea lampreys in the Great Lakes of North America

The movement of sea lampreys into the upper Great Lakes (Superior, Michigan, and Huron) initiated a series of biological changes which have extended beyond the fish directly attacked by the parasite. The threat posed by the sea lamprey was not generally recognized until it was well established in all the lakes and had seriously affected the fisheries in Lakes Huron and Michigan. As the sea lampr
Authors
Bernard R. Smith

Trichomoniasis

No abstract available.
Authors
R. M. Kocan, C. M. Herman

Variations in the biological vulnerability of birds to insecticides

No abstract available.
Authors
James O. Keith

Nickel-cobalt anomalies in laterite at Jabal Jedair

No abstract available 
Authors
Louis Gonzales

Aquilapollenites (Rouse) Funkhouser — Selected Rocky Mountain taxa and their stratigraphic ranges

The genus Aquilapollenites and its type species, A. quadrilobus, are redescribed, and the latter is illustrated. This report summarizes our present information on stratigraphic ranges of selected Rocky Mountain species and varieties of Aquilapollenites. Of the 17 taxa included in this report, 10 are previously named species, 4 are new species, and 3 are new varieties. One species is transferred fr
Authors
Bernadine D. Tschudy, Estella B. Leopold

Ground water resources of Iowa

No abstract available.
Authors
W. L. Steinhilber, P. J. Horick

Maximum floods in Iowa

No abstract available.
Authors
H.H. Schwob

Surface water resources of Iowa

No abstract available
Authors
W. W. Wiitala

Lymphosarcoma of the thymus of salmonids

No abstract available.
Authors
Roger L. Herman

Survival and development of lake herring (Coregonus artedii) eggs at various incubation temperatures

Lake herring eggs stripped and fertilized from a local stock were incubated in a constant-flow incubator at constant temperatures ranging from 0 to 12.1° C. Rate of development, percentage survival, percentage of abnormal and normal hatching, and length of fry at hatching were determined. The average incubation time from fertilization to 50% hatch varied from 37 days at 9.9-10.3° C to 236 days at
Authors
Peter J. Colby, L.T. Brooke

Palynology of the Cretaceous-Tertiary boundary in the northern Rocky Mountain and Mississippi Embayment regions

In both the Rocky Mountain and the Mississippi Embayment regions it is often difficult to distinguish Upper Cretaceous from lower Tertiary rocks on the basis of physical characteristics; the transition can be recognized with relative ease, however, on the basis of abrupt qualitative changes in plant microfossils. Many Cretaceous species vanish and new species appear in the Paleocene. In both regio
Authors
Robert H. Tschudy