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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 65,000 articles 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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Habitat use at night by wintering American woodcock in coastal Georgia and Virginia
Nocturnal habitats used by American woodcock (Scolopux minor) were studied using radio telemetry at two coastal wintering sites in Georgia (1982-84) and Virginia (1991-92). In Georgia, use of forested habitats at night was extensive while use of fields at night varied between years but generally was low. We found no difference in the probability of moving to a field at night among the four age-sex
Authors
C.S. Robbins
Highlights of bird control research in England, France, Holland, and Germany
No abstract available.
Authors
J.L. Seubert
Igneous rocks of the East Pacific Rise
The apical parts of large volcanoes along the East Pacific Rise (islands and seamounts) are encrusted with rocks of the alkali volcanic suite (alkali basalt, andesine- and oligoclase-andesite, and trachyte). In contrast, the more submerged parts of the Rise are largely composed of a tholeiitic basalt which has low concentrations of K, P, U, Th, Pb, and Ti. This tholeiitic basalt is either the pred
Authors
A.E.J. Engel, C.G. Engel
Ignition to concentrate shelled organisms in plankton samples
No abstract available.
Authors
K. N. Sachs, R. Cifelli, V. T. Bowen
Infrared surveys of Hawaiian volcanoes
Aerial infrared-sensor surveys of Kilauea volcano have depicted the areal extent and the relative intensity of abnormal thermal features in the caldera area of the volcano and along its associated rift zones. Many of these anomalies show correlation with visible steaming and reflect convective transfer of heat to the surface from subterranean sources. Structural details of the volcano, some not ev
Authors
W. A. Fischer, R.M. Moxham, F. Polcyn, G.H. Landis
Intracellular hemoglobin crystallization in two centrarchids, the largemouth bass and the bluegill
No abstract available.
Authors
A.E. Knight
Isotopic composition of lead and strontium from Ascension and Gough Islands
Isotopic composition of lead and strontium has been determined in a series of rock samples from two islands on the Mid-Atlantic Ridge. Both inter-and intra-island variations exist in the abundance of radiogenic isotopes of both elements. Lead from basalt of Ascension Island has a Pb206-Pb 204 ratio of 19.5, while the corresponding ratio at Gough Island is only 18.4. The Pb208-Pb204 ratios from the
Authors
P.W. Gast, G.R. Tilton, C. Hedge
Life history of lake herring in Lake Superior
The average annual commercial catch of lake herring (Coregonus artedi) in U.S. waters of Lake Superior was nearly 12 million pounds in 1929-61. This production contributed 62.4 percent of the total U.S. take of lake herring for the Great Lakes. About 90 percent of the annual catch is taken from small-mesh gill nets during the November-December spawning season.
The life-history studies were based
Authors
William R. Dryer, Joseph Beil
Matedness in the mourning dove and its effect on the nationwide dove-call census
No abstract available.
Authors
H. M. Wight
Minor-element composition and organic carbon content of marine and nonmarine shales of Late Cretaceous age in the western interior of the United States
The composition of nonmarine shales of Cretaceous age that contain less than 1 per cent organic carbon is assumed to represent the inherited minor-element composition of clayey sediments delivered to the Cretaceous sea that occupied the western interior region of North America. Differences in minor-element content between these samples and samples of1.(a) nonmarine carbonaceous shales (1 to 17 per
Authors
H. A. Tourtelot
Movements, growth, and rate of recapture of whitefish tagged in the Apostle Islands area of Lake Superior
A total of 1,303 whitefish were marked with spaghetti streamer tags in Wisconsin waters off Lake Superior in November of 1959, 1960, and 1961 and June-July 1960. The fish tagged in June-July 1960 were mostly undersized (less than 17 inches long) whereas those captured on the spawning grounds and tagged in November 1959-61 were almost all legal size. Of the 374 recoveries (28.7 percent), nearly all
Authors
William R. Dryer
Multiple parasitism in fledgling birds: Case reports
No abstract available.
Authors
G. M. Clark, L. N. Locke