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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Lava domes modeled as brittle shells that enclose pressurized magma, with application to Mount St. Helens
No abstract available.
Authors
R. M. Iverson
Management of percids in Lake Erie, North America
Lake Erie's fish populations and their habitats have undergone very substantial changes since 1945. Of the four percid forms originally present, the blue pike (Stizostedion vitreum glaucum) is presumed extinct, and the sauger (S. canadense) was commercially extinct by the 1950's. The walleye (S. v. vitreum) has remained stable in eastern Lake Erie but the highly productive stock of the western b
Authors
Richard W. Hatch, Stephen J. Nepszy, Michael R. Rawson
Mass-marking of otoliths of lake trout sac fry by temperature manipulation
The otoliths of 676,000 sac fry of lake trout Salvelinus namaycush in 1986, and of
1,100,000 in 1987, were marked by daily manipulation of water temperature. The fish were stocked into Lake Huron in the spring. Otolith marks consisted of groups of daily growth rings accentuated into recognizable patterns by steadily raising and lowering the temperature about IOA?C (from a base of 1-4A?C) over
Authors
R.A. Bergstedt, R.L. Eshenroder, C. II Bowen, J.G. Seelye, J.C. Locke
Multichannel seismic reflection surveys over the Antarctic continental margin relevant to petroleum resource studies
More than 100,000 km of marine multichannel seismic profiles have been acquired over the continental margin of Antarctica since 1976 by scientific research programs of Australia, Brazil, France, Italy, Japan, Norway, Poland, United Kingdom, United States, U.S.S.R. and West Germany. Although scientific results are reported for most of these data, they also are relevant to petroleum resource assessm
Authors
John C. Behrendt
Northern bobwhite, gray partridge, and ring-necked pheasant population trends (1966-1988) from the North American Breeding Bird Survey
We use North American Breeding Bird Survey data to estimate population trends for 1966-1988 for northern bobwhite (Colinus virginianus), ring-necked pheasant (Phasianus colchicus), and gray partridge (Perdix perdix). Bobwhite populations have undergone widespread declines, pheasant have undergone major declines in eastern North America with mixed trends elsewhere, gray partridge have undergone pr
Authors
Sam Droege, J.R. Sauer
Owls
Eight species of owls regularly occur and may breed in one or more of the southeastern states. Several additional northern or western species appear irregularly as accidentals or during years of southward incursions. In the Southeast, the most common and wide- spread owls are the common barn-owl, eastern screech-owl, great horned owl and barred owl; the most restricted is the burrowing owl. The l
Authors
D.G. Smith, D. H. Ellis, B.A. Millsap
Passive hemolytic plaque assay for detecting antibody-producing cells in fish
No abstract available at this time
Authors
D. P. Anderson
Perspectives on research in the North American Waterfowl Management Plan
No abstract available.
Authors
J. R. Longcore