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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.
Filter Total Items: 6063
Salmonid pharmacology and toxicology
No abstract available at this time
Authors
D. P. Anderson, F.L. Mayer
Sampling bird communities in bottomland hardwood forests of the Mississippi Alluvial Valley: Number of points visited versus number of visits to a point
Within each of 4 forest stands on Delta Experimental Forest (DEF), 25 points were visited 5 to 7 times from 8 May to 21 May 1991, and 6 times from 30 May to 12 June 1992. During each visit to a point, all birds detected, visuallyor aurally, at any distance were recorded during a 4-minute interval. Using these data, our objectives were to recommend the number of point counts and the number of visit
Authors
D.J. Twedt, W.P. Smith, R.J. Cooper, R.P. Ford, P.B. Hamel, D.A. Wiedenfeld
Sediment toxicity testing: Comparison of methods and evaluation of influencing factors
No abstract available.
Authors
P. V. Winger, P. J. Lasier
Species richness and relative abundance of breeding birds in forests of the Mississippi Alluvial Valley
In 1992, the Vicksburg Field Research Station of the National Wetlands Research Center initiated research on the ecology of migratory birds within forests of the Mississippi Alluvial Valley (MAV). The MAV was historically a nearly contiguous bottomland hardwood forest, however, only remnants remain. These remnants are fragmented and often influenced by drainage projects, silviculture, agriculture,
Authors
C.O. Nelms, D.J. Twedt
Stimulation of nonspecific defense mechanisms and the specific immune response in fish
No abstract available at this time
Authors
D. P. Anderson, A.K. Siwicki
Survival rate estimation in the presence of tag loss using joint analysis of capture-recapture and resighting data
Studies using resightings of marked birds typically make use of readily-observable tags that are not retained as well as metal legbands. We review methods for estimating survival rate with open capture-recapture / resighting models when tag loss is not negligible. All methods rely on data from double-banding studies, usually carried out as part of the resighting study by application of metal legb
Authors
J. D. Nichols, J. E. Hines
Teleseismic tomography; lithospheric structure of the San Andreas Fault system in northern and central California
No abstract available
Authors
H. M. Benz, George Zandt
Teleseismic velocity tomography using the ACH method; theory and application to continental-scale studies
No abstract available
Authors
J.R. Evans, Ulrich Achauer