Book Chapters
Science Quality and Integrity
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: 6152
An identifiable model for informative censoring An identifiable model for informative censoring
The usual model for censored survival analysis requires the assumption that censoring of observations arises only due to causes unrelated to the lifetime under consideration. It is easy to envision situations in which this assumption is unwarranted, and in which use of the Kaplan-Meier estimator and associated techniques will lead to unreliable analyses.
Authors
W.A. Link
Atlas de aves: Un metodo para documentar distribucion y seguir poblaciones Atlas de aves: Un metodo para documentar distribucion y seguir poblaciones
Los Atlas de Aves son proyectos nacionales o regionalies para trazar en mapas la distribucion en reproduccion de cada especie de ave. Ese procedimiento se esta usando en Europa, Australia, Nueva Zelanda, Norteamerica, y partes de Africa. El tama?o de los cuadrados varia de medio grado de latitud y Iongitud hasta 5 x 5 km. El trabajo de campo de cada proyecto exige aproxlmadamente cinco a...
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson
Autumn migrations of peregrine falcons at Assateague Island, Maryland/Virginia, 1970-1984 Autumn migrations of peregrine falcons at Assateague Island, Maryland/Virginia, 1970-1984
No abstract available.
Authors
F.P. Ward, K. Titus, W.S. Seegar, M.A. Yates, M.R. Fuller
Bias of animal population trend estimates Bias of animal population trend estimates
A computer simulation study of the population trend estimator used for the Mourning Dove Call-Count Survey, Woodcock Singing Ground Survey, Breeding Bird Survey and other surveys concluded that the estimator had negligible bias in most situations but that observer covariables should not be used with less than five years of data. With rare species (e.g. two birds per route), at least five...
Authors
P.H. Geissler, W.A. Link
Bioassay for phytotoxicity of toxicants to sago pondweed Bioassay for phytotoxicity of toxicants to sago pondweed
No abstract available.
Authors
W. Fleming, J.J. Momot, M.S. Ailstock
California condor, Gymnogyps californianus (Shaw) California condor, Gymnogyps californianus (Shaw)
No abstract available.
Authors
N.F.R. Snyder
Can relocated wolves survive? Can relocated wolves survive?
No abstract available.
Authors
S. Fritts, W.J. Paul, L.D. Mech
Coastal dune communities Coastal dune communities
No abstract available.
Authors
William L. Halvorson, R. Koske
Colonial waterbird management: a synopsis Colonial waterbird management: a synopsis
No abstract available.
Authors
R.M. Erwin