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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.
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The 'robust' capture-recapture design allows components of recruitment to be estimated
The 'robust' capture-recapture design (Pollock 1982) allows analyses which combine features of closed population model analyses (Otis et aI., 1978, White et aI., 1982) and open population model analyses (Pollock et aI., 1990). Estimators obtained under these analyses are more robust to unequal catch ability than traditional Jolly-Seber estimators (Pollock, 1982; Pollock et al., 1990; Kendall, 199
Authors
K. H. Pollock, W. L. Kendall, J. D. Nichols
The estimation of exchanges among populations or subpopulations
Capture-recapture methods for estimating rates of immigration, emigration, and movement among geographic strata are reviewed. We discuss likelihood-based estimation methods under models incorporating Markovian and non-Markovian movement. We briefly describe a computer program developed by Brownie et al. (1992) to carry out the necessary estimation and testing.
Authors
J. D. Nichols, C. Brownie, J. E. Hines, K. H. Pollock, J.B. Hestbeck
The genesis of giant porphyry molybdenum deposits
No abstract available
Authors
J. D. Keith, E. H. Christiansen, R.B. Carten
The influence of capture-recapture methodology on the evolution of the North American Bird Banding Program
Capture-recapture methodology has advanced greatly in the last twenty years and is now a major factor driving the continuing evolution of the North American bird banding program. Bird banding studies are becoming more scientific with improved study designs and analytical procedures. Researchers and managers are gaining more reliable knowledge which in turn betters the conservation of migratory b
Authors
J. Tautin
The nature of mineral deposits and the development and use of deposit models
No abstract available.
Authors
Donald A. Singer, Dennis P. Cox
The reintroduction of black bears in Arkansas
Abstract is unavailable.
Authors
Kimberly G. Smith, Joseph D. Clark, Scott D. Shull
Tourism impacts to protected areas: Procedures for the development of monitoring programs
No abstract available.
Authors
J. L. Marion
Trail inventory and assessment approaches to trail system planning at Delaware Water Gap National Recreation Area
Trail system planning and management require accurate assessments of existing trail resources and their condition. A standardized and efficient process for surveying, inventorying, and assessing trail systems was developed and applied in the Delaware Water Gap National Recreation Area. Two approaches employed were (1) a Trail System Inventory, and (2) Prescriptive Work Logs. These complimentary
Authors
P.B. Williams, J. L. Marion
Undiscovered oil and gas resources and leasing status of forestlands in Wyoming
All of four national forests, one national grassland, and parts of four additional forests lie within the State of Wyoming. Some of these National Forest System lands have moderate to high potential for undiscovered oil and gas resources. In the 1989 National Assessment of undiscovered oil and gas and in various Open-File Reports, the U.S. Geological Survey described oil and gas plays and presente
Authors
M.R. Holm, R. B. Powers, G. L. Dolton, B. E. Law, J. E. Fox, J. S. Dersch
Use of acoustic Doppler current profiler for flow measurements of Mata gorda Bay entrance channel
No abstract available
Authors
M.E. Jennings, Ruben Solis