Understanding food webs in the Chesapeake Bay
J.R. Keough, G.M. Haramis, Matthew C. Perry
Matthew C. Perry, editor(s)
2002, Book chapter, Black ducks and their Chesapeake Bay habitats : proceedings of a symposium
Approaches to predictive modeling and to management of the Chesapeake Bay ecosystem are 'bottom up' (i.e., approaches involve the control of nutrient inputs in attempts to manage plankton productivity) and 'top down' (i.e., approaches involve controls on harvest of fisheries and wildlife in attempts to manage vertebrate populations). Both...
Statistical concepts: Estimating absolute densities of tigers using capture-recapture sampling
J.D. Nichols, K. U. Karanth
K.Ullas Karanth, James D. Nichols, editor(s)
2002, Book chapter, Monitoring tigers and their prey: A manual for wildlife researchers, managers and conservationists in tropical Asia
Contents: -- Introduction -- Photo trapping tigers -- Capture-recapture models -- Survey design considerations -- Conclusion -- References...
Contrasting determinants of abundance in ancestral and colonized ranges of an invasive brood parasite
D.C. Hahn, R.J. O’Connor
J. Michael Scott, Patricia J. Heglund, Michael L. Morrison, Jonathan B. Haufler, William A. Wall, editor(s)
2002, Book chapter, Predicting Species Occurrences : Issues of Accuracy and Scale
Avian species distributions are typically regarded as constrained by spatially extensive variables such as climate, habitat, spatial patchiness, and microhabitat attributes. We hypothesized that the distribution of a brood parasite depends as strongly on host distribution patterns as on biophysical factors and examined this hypothesis with respect to the...
Investigations of potential bias in the estimation of lambda using Pradel's (1996) model for capture-recapture data
J.E. Hines, J.D. Nichols
2002, Book chapter, Statistical analysis of data from marked bird populations
Pradel's (1996) temporal symmetry model permitting direct estimation and modelling of population growth rate, lambda sub i provides a potentially useful tool for the study of population dynamics using marked animals. Because of its recent publication date, the approach has not seen much use, and there have been virtually...
Random effects and shrinkage estimation in capture-recapture models
J. Andrew Royle, W.A. Link
2002, Book chapter, Statistical analysis of data from marked bird populations
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...
The use of resighting data to estimate the rate of population growth of the snail kite in Florida
V.J. Dreitz, J.D. Nichols, J.E. Hines, R.E. Bennetts, W.M. Kitchens, D.L. DeAngelis
2002, Journal of Applied Statistics (29) 609-623
The rate of population growth (lambda) is an important demographic parameter used to assess the viability of a population and to develop management and conservation agendas. We examined the use of resighting data to estimate lambda for the snail kite population in Florida from 1997-2000. The analyses consisted of (1)...
Model-based estimation of individual fitness
W.A. Link, E.G. Cooch, E. Cam
2002, Book chapter, Statistical analysis of data from marked bird populations
Fitness is the currency of natural selection, a measure of the propagation rate of genotypes into future generations. Its various definitions have the common feature that they are functions of survival and fertility rates. At the individual level, the operative level for natural selection, these rates must be...
Modelling postfledging survival and age-specific breeding probabilities in species with delayed maturity: A case study of Roseate Terns at Falkner Island, Connecticut
Jeffrey A. Spendelow, James D. Nichols, J.E. Hines, Jean-Dominique Lebreton, Roger Pradel
2002, Journal of Applied Statistics (29) 385-405
We modeled postfledging survival and age-specific breeding probabilities in endangered Roseate Terns (Sterna dougallii) at Falkner Island, Connecticut, USA using capture-recapture data from 1988-1998 of birds ringed as chicks and as adults. While no individuals bred as 2-yr-olds during this period, about three-quarters of the young that survived and...
Occam's shadow: levels of analysis in evolutionary ecology - where to next?
E.G. Cooch, E. Cam, W.A. Link
2002, Journal of Applied Statistics (29) 19-48
Evolutionary ecology is the study of evolutionary processes, and the ecological conditions that influence them. A fundamental paradigm underlying the study of evolution is natural selection. Although there are a variety of operational definitions for natural selection in the literature, perhaps the most general one is that which...
Breeding population density and habitat use of Swainson's warblers in a Georgia floodplain forest
E.A. Wright
2002, Book
I examined density and habitat use of a Swainson's Warbler (Limnothlypis swainsonii) breeding population in Georgia. This songbird species is inadequately monitored, and may be declining due to anthropogenic alteration of floodplain forest breeding habitats. I used distance sampling methods to estimate density, finding 9.4 singing males/ha (CV...
Analysis and Management of Animal Populations: Modeling, Estimation and Decision Making
B. Kenneth Williams, J.D. Nichols, M.J. Conroy
2002, Book
This book deals with the processes involved in making informed decisions about the management of animal populations. It covers the modeling of population responses to management actions, the estimation of quantities needed in the modeling effort, and the application of these estimates and models to the development of sound...
Exposure of free-flying birds to anticholinesterase insecticides in two conventionally managed fruit orchards
S.L. Borges
2002, Book
Conventionally managed orchards receive extensive applications of anticholinesterase (anti-ChE) insecticides throughout the growing season. Because many avian species make use of these environments for nesting and foraging, they may receive substantial exposure to anti-ChEs. The model used to assess avian risk in these environments is highly simplified, and...
Backscatter Intensity and Sun-Illuminated Sea Floor Topography of Quadrangles 1 and 2
Page C. Valentine, Tammie J. Middleton, Sarah J. Fuller
2002, IMAP 2698-E
The Great South Channel separates the western part of Georges Bank from Nantucket Shoals and is a major conduit for the exchange of water between the Gulf of Maine to the north and the Atlantic Ocean to the south. Water depths range mostly between 65 and 80 m in the...
Simulation of hydrodynamics, temperature, and dissolved oxygen in Beaver Lake, Arkansas, 1994-1995
Brian Haggard, W. Reed Green
2002, Water-Resources Investigations Report 2002-4116
The tailwaters of Beaver Lake and other White River reservoirs support a cold-water trout fishery of significant economic yield in northwestern Arkansas. The Arkansas Game and Fish Commission has requested an increase in existing minimum flows through the Beaver Lake dam to increase the amount of fishable waters downstream. Information...
Ground-Water Resource Assessment in the Rio Grande de Manati Alluvial Plain, Rio Arriba Saliente Area, Puerto Rico
Sigfredo Torres-Gonzalez, Fernando Gómez-Gómez, Andrew G. Warne
2002, Water-Resources Investigations Report 2002-4132
The alluvial aquifer within a 160-acre area of the Rio Grande de Manati alluvial plain was investigated to evaluate its potential as a water-supply source for the Barrios Rio Arriba Saliente and Pugnado Afuera, municipio of Manati, Puerto Rico. Analysis of well boring samples and the results of electric resistivity...
Investigation of the geology and hydrology of the Coconino Plateau of northern Arizona: a project of the Arizona Rural Watershed Initiative
Marilyn E. Flynn, Donald J. Bills
2002, Fact Sheet 113-02
The water resources of the Coconino Plateau in northern Arizona are under increasing demand as a result of development. The population of this arid region continues to grow, and the number of visitors to the many national and state parks and monuments in the region has increased annually. The sustainability,...
Factors affecting ground-water exchange and catchment size for Florida lakes in mantled karst terrain
Terrie Mackin Lee
2002, Water-Resources Investigations Report 2002-4033
In the mantled karst terrain of Florida, the size of the catchment delivering ground-water inflow to lakes is often considerably smaller than the topographically defined drainage basin. The size is determined by a balance of factors that act individually to enhance or diminish the hydraulic connection between the lake and...
Simulation of hydrodynamics, temperature, and dissolved oxygen in Norfork Lake, Arkansas, 1994-1995
Joel M. Galloway, W. Reed Green
2002, Water-Resources Investigations Report 2002-4250
Outflow from Norfork Lake and other White River reservoirs support a cold-water trout fishery of significant economic yield in north-central Arkansas and south-central Missouri. The Arkansas Game and Fish Commission has requested an increase in existing minimum flows through the Norfork Lake dam to increase the amount of fishable waters...
Preliminary volcano-hazard assessment for Kanaga Volcano, Alaska
Christopher F. Waythomas, Thomas P. Miller, Christopher J. Nye
2002, Open-File Report 2002-397
Kanaga Volcano is a steep-sided, symmetrical, cone-shaped, 1307 meter high, andesitic stratovolcano on the north end of Kanaga Island (51°55’ N latitude, 177°10’ W longitude) in the western Aleutian Islands of Alaska. Kanaga Island is an elongated, low-relief (except for the volcano) island, located about 35 kilometers west of the...
Water-quality, biological, and habitat assessment of the Boeuf River Basin, southeastern Arkansas, 1994-96
C. Shane Barks, James C. Petersen, Faron D. Usrey
2002, Water-Resources Investigations Report 2002-4187
Water-quality and biological samples were collected at several sites in the Boeuf River Basin between November 1994 and December 1996. Water-quality and benthic macroinvertebrate community samples were collected and habitat was measured once at 25 ambient monitoring sites during periods of seasonal low flow. Water-quality storm-runoff samples were collected during...
Application of landscape models to alternative futures analyses
A.C. Neale, K. Bruce Jones, Nash Maliha, Rick D. van Remortel, James D. Wickham, Kurt H. Riitters, Robert V. O’Neill
2002, Book chapter, Managing for healthy ecosystems
Scientists and environmental managers alike are concerned about broadscale changes in land use and landscape pattern and their cumulative impact on environmental and economic end points, such as water quality and quantity, species habitat, productivity, erosion potential, recreational value, and overall ecological health (Rapport et al., 1998). They also are...
Ground-water, surface-water, and water-chemistry data, Black Mesa Area, northeastern Arizona — 2000–2001, and performance and sensitivity of the 1988 USGS numerical model of the N aquifer
Blakemore E. Thomas
2002, Water-Resources Investigations Report 2002-4211
The N aquifer is the major source of water in the 5,400-square-mile area of Black Mesa in northeastern Arizona. Availability of water is an important issue in this area because of continued industrial and municipal use, a growing population, and precipitation of about 6 to 14 inches per year. The monitoring...
Digital mapping techniques '02, workshop proceedings : May 19-22, 2002, Salt Lake City, Utah
David R. Soller
2002, Open-File Report 2002-370
The Digital Mapping Techniques '02 (DMT'02) workshop was attended by 101 technical experts from 43 agencies, universities, and private companies, including representatives from 25 state geological surveys (see Appendix A). This workshop was similar in nature to the previous five meetings, held in Lawrence, Kansas (Soller, 1997), in Champaign, Illinois...
Geologic map of the Death Valley ground-water model area, Nevada and California
Jeremiah B. Workman, Christopher M. Menges, William R. Page, Emily M. Taylor, E. Bartlett Ekren, Peter D. Rowley, Gary L. Dixon, Ren A. Thompson, Lauren A. Wright
2002, Miscellaneous Field Studies Map 2381-A
No abstract available....
An update of Quaternary faults of central and eastern Oregon
Ray J. Weldon II, D.K. Fletcher, E.M. Weldon, K.M. Scharer, P.A. McCrory
2002, Open-File Report 2002-301
This is the online version of a CD-ROM publication. We have updated the eastern portion of our previous active fault map of Oregon (Pezzopane, Nakata, and Weldon, 1992) as a contribution to the larger USGS effort to produce digital maps of active faults in the Pacific Northwest region. The 1992...
