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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: 6198
Monitoring tigers and prey: conservation needs and managerial constraints Monitoring tigers and prey: conservation needs and managerial constraints
Contents: -- Introduction -- The sampling-based approach to monitoring -- Defining objectives -- Assessing available resources -- Decision making: Matching objectives and resources -- References
Authors
K. U. Karanth, J.D. Nichols, P.K. Sen, V. Rishi
MTBE in groundwater of the U.S.: Occurrence, potential sources, and long-range transport MTBE in groundwater of the U.S.: Occurrence, potential sources, and long-range transport
Groundwater is an important and valuable resource in the U.S. To some extent, groundwater is used in all 50 states to provide drinking water. In 1995, more than 50% of the population, more than 130 million people, relied on groundwater for drinking water supplies (Solley et al., 1998). About 30%, or 42 million, of these people obtained their water from privately owned wells (U.S...
Authors
Michael J. Moran, John S. Zogorski, Paul J. Squillace
Otters Otters
The otters (Mustelidae; Lutrinae) provide a unique look into the evolution of marine living by mammals. This is because most extant marine mammals have been so highly modified by long periods of selection for life in the sea that they bare little resemblance to their terrestrial ancestors. Marine otters, by contrast, are recent expatriates from terrestrial and freshwater habitats, and...
Authors
James A. Estes, James L. Bodkin
Paleoenvironmental history of the Rocky Mountain Region during the past 20,000 years Paleoenvironmental history of the Rocky Mountain Region during the past 20,000 years
No abstract available.
Authors
C. Whitlock, M.A. Reasoner, C.H. Key
Pathogens of cultured fishes: potential risks to wild fish populations Pathogens of cultured fishes: potential risks to wild fish populations
No abstract available at this time
Authors
V. S. Blazer, S. E. LaPatra
Population monitoring: a conceptual framework Population monitoring: a conceptual framework
Contents: -- Introduction -- The statistical framework -- References
Authors
J.D. Nichols, K. U. Karanth
Preface: Proceedings of the seventh international symposium on the biology and management of corigonid fishes Preface: Proceedings of the seventh international symposium on the biology and management of corigonid fishes
This volume is the proceedings of the Seventh International Symposium on the Biology and Management of Coregonid Fishes (ISBMCF). As in all six preceding symposia, the seventh meeting of the ISBMCF provided an international forum for the scientific review and discussion of the various taxonomic, biological, ecological, and management issues that surround this important group of Holarctic...
Authors
Thomas Todd, Guy Fleischer
Preliminary evaluation of the coalbed methane potential of the Gulf Coastal Plain, USA and Mexico Preliminary evaluation of the coalbed methane potential of the Gulf Coastal Plain, USA and Mexico
Several areas in the Gulf Coast have potential for coalbed gas accumulations. These areas include parts of southern Alabama and Mississippi, north-central Louisiana, northeast, east-central and south Texas and northeastern Mexico. The coal deposits in these areas vary in rank, thickness, lateral extent and gas content, and range in age from Late Cretaceous to Eocene. Gas desorption tests...
Authors
Peter D. Warwick, Charles E. Barker, John R. SanFilipo
Random effects and shrinkage estimation in capture-recapture models Random effects and shrinkage estimation in capture-recapture models
We discuss the analysis of random effects in capture-recapture models, and outline Bayesian and frequentists approaches to their analysis. Under a normal model, random effects estimators derived from Bayesian or frequentist considerations have a common form as shrinkage estimators. We discuss some of the difficulties of analysing random effects using traditional methods, and argue that a
Authors
J. Andrew Royle, W.A. Link