Book Chapters
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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.
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: 6155
Reappraisal of the Winter Bird-Population Study technique Reappraisal of the Winter Bird-Population Study technique
Standardized morning and afternoon counts were conducted in two deciduous forest plots during seven winters. Morning counts yielded more species than afternoon counts, as well as higher counts of most species. A minimum of eight visits is recommended. Six visits yielded 2% to 5% fewer species, depending on the size and bird population of the study plot. Cumulative means for individual...
Authors
C.S. Robbins
Reducing bird count variability by training observers Reducing bird count variability by training observers
No abstract available.
Authors
C. B. Kepler, J. M. Scott
Refraction programs: four or fewer dipping seismic refractors--interpretation Refraction programs: four or fewer dipping seismic refractors--interpretation
No abstract available.
Authors
D. L. Campbell
Remarks on the use of mark-recapture methodology in estimating avian population size Remarks on the use of mark-recapture methodology in estimating avian population size
No abstract available.
Authors
J.D. Nichols, B.R. Noon, S.L. Stokes, J.E. Hines
Reproductive tests of diazinon on bobwhite quail Reproductive tests of diazinon on bobwhite quail
Diazinon was fed at sublethal levels to reproductively active bobwhite (Colinus virginianus). Thirty pairs were given constant concentrations (0, 35. 50, 72, 104, or 150 ppm) for 3 weeks (Constant group). Another 30 pairs (Pair-fed group) were matched to these by body weights and were fed the amounts of untreated food consumed by corresponding Constant pairs to evaluate the effect of...
Authors
K. L. Stromborg
Requirements of warmwater fish Requirements of warmwater fish
No abstract available at this time
Authors
N. C. Parker
Roads and roadside habitat in relation to small mammal distribution and abundance Roads and roadside habitat in relation to small mammal distribution and abundance
No abstract available.
Authors
L.W. Adams, A. D. Geis
Sampling in rugged terrain Sampling in rugged terrain
Work in rugged terrain poses some unique problems that should be considered before research is initiated. Besides the obvious physical difficulties of crossing uneven terrain, topography can influence the bird species? composition of a forest and the observer's ability to detect birds and estimate distances. Census results can also be affected by the slower rate of travel on rugged...
Authors
D.K. Dawson
Saving the Newell's shearwater Saving the Newell's shearwater
No abstract available.
Authors
J.L. Sincock
Shorebirds of the eastern Bering Sea Shorebirds of the eastern Bering Sea
Largely on the basis of work conducted in western Alaska since 1975, we present an overview of the shorebird resources of the region and discuss their relationship to the littoral and supralittoral habitats of the area. Thirty species of shorebirds occur regularly and comprise an important component of the eastern Bering Sea ecosystem. For a third of these species the region supports the...
Authors
J.A. Calder, Donald W. Hood
Some finite element applications in environmental hydrodynamics Some finite element applications in environmental hydrodynamics
No abstract available.
Authors
R. T. Cheng, R. Walters