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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: 6164
Keys to a successful project: associated data and planning. Voucher specimens Keys to a successful project: associated data and planning. Voucher specimens
No abstract available.
Authors
R.P. Reynolds, R.I. Crombie, R.W. McDiarmid
Keys to a successful project: Associated data and planning: Data standards Keys to a successful project: Associated data and planning: Data standards
The many individual salamanders, frogs, caecilians, and their larvae encountered during the course of an inventory or monitoring project will have to be identified to species. Depending on the goals and sampling method(s) used, some individuals will be identified from a distance by their calls, others will be handled. At the same time, some will be marked for recapture, and others will...
Authors
Roy W. McDiarmid
Macrophage aggregates as indicators of environmental stress Macrophage aggregates as indicators of environmental stress
No abstract available at this time
Authors
V. S. Blazer, D.E. Facey, J.W. Fournie, L.A. Courtney, J.K. Summers
Map and table showing isotopic age data in Alaska Map and table showing isotopic age data in Alaska
The source of the data reported here is a compilation of radiometric ages maintained in conjunction with the Alaska Mineral Resource Assessment Program (AMRAP) studies for Alaska. The symbol shape plotted at each location is coded for rock type, whether igneous, metamorphic, or other; the color of the symbol shows the geologic era or period for the Sample(s) at each locale. A list of...
Authors
Frederic H. Wilson, Nora B. Shew, G.D. DuBois
Measurements of toxicity and critical stages of development Measurements of toxicity and critical stages of development
No abstract available.
Authors
D. J. Hoffman
Mercury concentrations in perch (Perca fluviatilis) as influenced by lacustrine physical and chemical factors in two regions of Russia Mercury concentrations in perch (Perca fluviatilis) as influenced by lacustrine physical and chemical factors in two regions of Russia
No abstract available.
Authors
T. Haines, V. Komov, C. Jagoe
Monitoring and protecting biotic diversity Monitoring and protecting biotic diversity
Abstract not supplied at this time
Authors
C.K. Dodd
Morphology of the gill apparatus of fish from acidic lakes Morphology of the gill apparatus of fish from acidic lakes
No abstract available at this time
Authors
V. Matey, C. Jagoe, T. Haines
Northern mockingbird Mimus polyglottos Northern mockingbird Mimus polyglottos
No abstract available.
Authors
C.S. Robbins
Opercular membranes and skin Opercular membranes and skin
No abstract available at this time
Authors
S. D. McCormick
Organochlorine pesticides, chlorinated dioxins and furans, and PCBs in peregrine falcon Falco peregrinus eggs from the Kola peninsula, Russia Organochlorine pesticides, chlorinated dioxins and furans, and PCBs in peregrine falcon Falco peregrinus eggs from the Kola peninsula, Russia
Nesting of a bog-associated population of mlgfatory Peregrine Falcons, Falco peregrinus, along the Ponoy River depression, Kola Peninsula, Russia, has been studied since 1977. In 1987 91 production rates averaged 1.94 young per active nest and the number of breeding pairs increased from 4 to 10. In 1991, most eyrie sites were visited during the egg stage and a 'sample' egg was collected...
Authors
Charles J. Henny, S.A. Ganusevich, F.P. Ward, T.R. Schwartz