Thomas Stanley, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 51
Estimating length of avian incubation and nestling stages in afrotropical forest birds from interval-censored nest records
In the East Usambara Mountains in northeast Tanzania, research on the effects of forest fragmentation and disturbance on nest survival in understory birds resulted in the accumulation of 1,002 nest records between 2003 and 2008 for 8 poorly studied species. Because information on the length of the incubation and nestling stages in these species is nonexistent or sparse, our objectives in this stud
Authors
T.R. Stanley, W.D. Newmark
Land use and small mammal predation effects on shortgrass prairie birds
Grassland birds endemic to the central shortgrass prairie ecoregion of the United States have experienced steep and widespread declines over the last 3 decades, and factors influencing reproductive success have been implicated. Nest predation is the major cause of nest failure in passerines, and nesting success for some shortgrass prairie birds is exceptionally low. The 3 primary land uses in the
Authors
T.R. Stanley
Estimating the breeding population of long-billed curlew in the United States
Determining population size and long-term trends in population size for species of high concern is a priority of international, national, and regional conservation plans. Long-billed curlews (Numenius americanus) are a species of special concern in North America due to apparent declines in their population. Because long-billed curlews are not adequately monitored by existing programs, we undertook
Authors
T.R. Stanley, S. K. Skagen
Estimating site occupancy and abundance using indirect detection indices
Knowledge of factors influencing animal distribution and abundance is essential in many areas of ecological research, management, and policy-making. Because common methods for modeling and estimating abundance (e.g., capture–recapture, distance sampling) are sometimes not practical for large areas or elusive species, indices are sometimes used as surrogate measures of abundance. We present an exte
Authors
Thomas R. Stanley, J. Andrew Royle
Interaction of beaver and elk herbivory reduces standing crop of willow
Populations of beaver and willow have not thrived in riparian environments that are heavily browsed by livestock or ungulates, such as elk. The interaction of beaver and elk herbivory may be an important mechanism underlying beaver and willow declines in this competitive environment. We conducted a field experiment that compared the standing crop of willow three years after simulated beaver cuttin
Authors
B.W. Baker, D.C.S. Mitchell, H.C. Ducharme, T.R. Stanley, H.R. Peinetti
Software Review: A program for testing capture-recapture data for closure
Capture-recapture methods are widely used to estimate population parameters of free-ranging animals. Closed-population capture-recapture models, which assume there are no additions to or losses from the population over the period of study (i.e., the closure assumption), are preferred for population estimation over the open-population models, which do not assume closure, because heterogeneity in de
Authors
Thomas R. Stanley, Jon D. Richards
Survival estimation in bats: historical overview, critical appraisal, and suggestions for new approaches
No abstract available.
Authors
T. J. O'Shea, L.E. Ellison, T.R. Stanley
Estimating stage-specific daily survival probabilities of nests when nest age is unknown
Estimation of daily survival probabilities of nests is common in studies of avian populations. Since the introduction of Mayfield's (1961, 1975) estimator, numerous models have been developed to relax Mayfield's assumptions and account for biologically important sources of variation. Stanley (2000) presented a model for estimating stage-specific (e.g. incubation stage, nestling stage) daily surviv
Authors
T.R. Stanley
When should Mayfield model data be discarded?
Much confusion exists over the proper way to handle nest-fate data collected after the fledge date when using the Mayfield method. I provide a simple numerical example showing how use of these data can bias estimates of daily survival probability, and present a likelihood function demonstrating that nest-fate data collected after the fledge date do not contribute any information for parameter esti
Authors
T.R. Stanley
Why aren't there more beaver in Rocky Mountain National Park?
No abstract available.
Authors
B. W. Baker, D. Mitchell, H.C. Ducharme, T.R. Stanley, H.R. Peinetti
Small-mammal density estimation: A field comparison of grid-based vs. web-based density estimators
Statistical models for estimating absolute densities of field populations of animals have been widely used over the last century in both scientific studies and wildlife management programs. To date, two general classes of density estimation models have been developed: models that use data sets from capture–recapture or removal sampling techniques (often derived from trapping grids) from which sepa
Authors
R.R. Parmenter, Terry L. Yates, D.R. Anderson, K.P. Burnham, J.L. Dunnum, A.B. Franklin, M.T. Friggens, B. C. Lubow, Michael Miller, G.S. Olson, Cheryl A. Parmenter, J. Pollard, E. Rexstad, T.M. Shenk, T.R. Stanley, Gary C. White
How many kilojoules does a Black-billed Magpie nest cost?
Energetic costs of nest construction are difficult to estimate for birds, and currently estimates are available for only a handful of species. In this paper, I estimate the minimum cost of nest construction by a pair of Black-billed Magpies (Pica hudsonia). Data on the number of sticks and mud pellets comprising a nest were used to determine the minimum number of trips required to construct the ne
Authors
T.R. Stanley
Non-USGS Publications**
Stanley, T.R., Spann, J.W., Smith, G.J. et al. Arch. Environ. Contam. Toxicol. (1994) 26: 444. doi:10.1007/BF00214145
Stanley, T.R. 1996. European tools to consider. Review of the book: Managing habitats for conservation, by W.J. Sutherland and D.A. Hill (eds.). Conservation Biology. 10(4): 1300-1301.
Stanley, T.R. 1994. A cottontail-habitat model for evaluating the Conservation Reserve Program. Fort Collins, CO46 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 51
Estimating length of avian incubation and nestling stages in afrotropical forest birds from interval-censored nest records
In the East Usambara Mountains in northeast Tanzania, research on the effects of forest fragmentation and disturbance on nest survival in understory birds resulted in the accumulation of 1,002 nest records between 2003 and 2008 for 8 poorly studied species. Because information on the length of the incubation and nestling stages in these species is nonexistent or sparse, our objectives in this stud
Authors
T.R. Stanley, W.D. Newmark
Land use and small mammal predation effects on shortgrass prairie birds
Grassland birds endemic to the central shortgrass prairie ecoregion of the United States have experienced steep and widespread declines over the last 3 decades, and factors influencing reproductive success have been implicated. Nest predation is the major cause of nest failure in passerines, and nesting success for some shortgrass prairie birds is exceptionally low. The 3 primary land uses in the
Authors
T.R. Stanley
Estimating the breeding population of long-billed curlew in the United States
Determining population size and long-term trends in population size for species of high concern is a priority of international, national, and regional conservation plans. Long-billed curlews (Numenius americanus) are a species of special concern in North America due to apparent declines in their population. Because long-billed curlews are not adequately monitored by existing programs, we undertook
Authors
T.R. Stanley, S. K. Skagen
Estimating site occupancy and abundance using indirect detection indices
Knowledge of factors influencing animal distribution and abundance is essential in many areas of ecological research, management, and policy-making. Because common methods for modeling and estimating abundance (e.g., capture–recapture, distance sampling) are sometimes not practical for large areas or elusive species, indices are sometimes used as surrogate measures of abundance. We present an exte
Authors
Thomas R. Stanley, J. Andrew Royle
Interaction of beaver and elk herbivory reduces standing crop of willow
Populations of beaver and willow have not thrived in riparian environments that are heavily browsed by livestock or ungulates, such as elk. The interaction of beaver and elk herbivory may be an important mechanism underlying beaver and willow declines in this competitive environment. We conducted a field experiment that compared the standing crop of willow three years after simulated beaver cuttin
Authors
B.W. Baker, D.C.S. Mitchell, H.C. Ducharme, T.R. Stanley, H.R. Peinetti
Software Review: A program for testing capture-recapture data for closure
Capture-recapture methods are widely used to estimate population parameters of free-ranging animals. Closed-population capture-recapture models, which assume there are no additions to or losses from the population over the period of study (i.e., the closure assumption), are preferred for population estimation over the open-population models, which do not assume closure, because heterogeneity in de
Authors
Thomas R. Stanley, Jon D. Richards
Survival estimation in bats: historical overview, critical appraisal, and suggestions for new approaches
No abstract available.
Authors
T. J. O'Shea, L.E. Ellison, T.R. Stanley
Estimating stage-specific daily survival probabilities of nests when nest age is unknown
Estimation of daily survival probabilities of nests is common in studies of avian populations. Since the introduction of Mayfield's (1961, 1975) estimator, numerous models have been developed to relax Mayfield's assumptions and account for biologically important sources of variation. Stanley (2000) presented a model for estimating stage-specific (e.g. incubation stage, nestling stage) daily surviv
Authors
T.R. Stanley
When should Mayfield model data be discarded?
Much confusion exists over the proper way to handle nest-fate data collected after the fledge date when using the Mayfield method. I provide a simple numerical example showing how use of these data can bias estimates of daily survival probability, and present a likelihood function demonstrating that nest-fate data collected after the fledge date do not contribute any information for parameter esti
Authors
T.R. Stanley
Why aren't there more beaver in Rocky Mountain National Park?
No abstract available.
Authors
B. W. Baker, D. Mitchell, H.C. Ducharme, T.R. Stanley, H.R. Peinetti
Small-mammal density estimation: A field comparison of grid-based vs. web-based density estimators
Statistical models for estimating absolute densities of field populations of animals have been widely used over the last century in both scientific studies and wildlife management programs. To date, two general classes of density estimation models have been developed: models that use data sets from capture–recapture or removal sampling techniques (often derived from trapping grids) from which sepa
Authors
R.R. Parmenter, Terry L. Yates, D.R. Anderson, K.P. Burnham, J.L. Dunnum, A.B. Franklin, M.T. Friggens, B. C. Lubow, Michael Miller, G.S. Olson, Cheryl A. Parmenter, J. Pollard, E. Rexstad, T.M. Shenk, T.R. Stanley, Gary C. White
How many kilojoules does a Black-billed Magpie nest cost?
Energetic costs of nest construction are difficult to estimate for birds, and currently estimates are available for only a handful of species. In this paper, I estimate the minimum cost of nest construction by a pair of Black-billed Magpies (Pica hudsonia). Data on the number of sticks and mud pellets comprising a nest were used to determine the minimum number of trips required to construct the ne
Authors
T.R. Stanley
Non-USGS Publications**
Stanley, T.R., Spann, J.W., Smith, G.J. et al. Arch. Environ. Contam. Toxicol. (1994) 26: 444. doi:10.1007/BF00214145
Stanley, T.R. 1996. European tools to consider. Review of the book: Managing habitats for conservation, by W.J. Sutherland and D.A. Hill (eds.). Conservation Biology. 10(4): 1300-1301.
Stanley, T.R. 1994. A cottontail-habitat model for evaluating the Conservation Reserve Program. Fort Collins, CO46 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government