James Nichols, Ph.D.
Dr. Jim Nichols conducts research on animal population dynamics and management
Recent Accomplishments
Education
- B.S. Wake Forest University, Biology, 1971
- M.S. Louisiana State University, Wildlife Management, 1973
- Ph.D. Michigan State University, Wildlife Ecology, 1976
Professional Studies/Experience
- Adaptive management and assessment of habitat changes on migratory birds
- Development of models of mallard population dynamics for adaptive harvest management
- Development of methods to estimate parameters associated with animal population dynamics
- Statistical methods for species richness estimation
- Technical Assistance -Tiger Monitoring and Population Research
- Development of methods for estimating patch occupancy and patch-dynamic parameters from detection-nondetection survey data
- Development of methods to estimate species richness and community-dynamic parameters from species list data
Mentorship/Outreach
Professional societies/affiliations/committees/editorial boardsScientific/Oral Presentations, Abstracts
Honors, awards, recognition, elected offices
- 2005 - U.S. Presidential Rank Award (Meritorious Senior Professional)
- 2004 - U.S. Geological Survey Meritorious Service Award
- 2004 - IFAS Scholar Award, University of Florida
- 1998 - Promoted to Senior Scientist, U.S. Geological Survey
- 1991 - The George W. Snedecor Award of the American Statistical Association
- 1991 - The Wildlife Society's Wildlife Publication Award for Monograph
- 1984 - Southeastern Section of the Wildlife Society, Outstanding Publication Award
Scientific/Oral Presentations, Abstracts
Science and Products
Filter Total Items: 417
The 'robust' capture-recapture design allows components of recruitment to be estimated 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...
Authors
K. H. Pollock, W. L. Kendall, J.D. Nichols
Survival rate estimation in the presence of tag loss using joint analysis of capture-recapture and resighting data Survival rate estimation in the presence of tag loss using joint analysis of capture-recapture and resighting data
Studies using resightings of marked birds typically make use of readily-observable tags that are not retained as well as metal legbands. We review methods for estimating survival rate with open capture-recapture / resighting models when tag loss is not negligible. All methods rely on data from double-banding studies, usually carried out as part of the resighting study by application of...
Authors
J.D. Nichols, J.E. Hines
Analyses of banding data Analyses of banding data
No abstract available.
Authors
J.D. Nichols, R. E. Tomlinson
The estimation of exchanges among populations or subpopulations 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
Annual survival rates of adult and immature eastern population tundra swans Annual survival rates of adult and immature eastern population tundra swans
Tundra swans (Cygnus columbianus) of the eastern population were neckbanded in Maryland, North Carolina, and Alaska from 1966 through 1990. These swans were resighted and recaptured during autumn, winter, and spring, 1966-1990. Although the original motivation for this study involved swan movements, we wanted to use the resulting data to test hypotheses about sources of variation in swan...
Authors
James D. Nichols, J. Bart, Roland J. Limpert, William J.L. Sladen, James E. Hines
Estimating transition probabilities for stage-based population projection matrices using capture-recapture data Estimating transition probabilities for stage-based population projection matrices using capture-recapture data
In stage—based demography, animals are often categorized into size (or mass) classes, and size—based probabilities of surviving and changing mass classes must be estimated before demographic analyses can be conducted. In this paper, we develop two procedures for the estimation of mass transition probabilities from capture—recapture data. The first approach uses a multistate capture...
Authors
James D. Nichols, John R. Sauer, Kenneth H. Pollock, Jay B. Hestbeck
Population dynamics of breeding waterfowl Population dynamics of breeding waterfowl
No abstract available.
Authors
Douglas H. Johnson, J.D. Nichols, M.D. Schwartz
A stochastic population model of mid-continental mallards A stochastic population model of mid-continental mallards
No abstract available.
Authors
Rolf R. Koford, J.R. Sauer, Douglas H. Johnson, J.D. Nichols, M.D. Samuel
Population dynamics of breeding waterfowl Population dynamics of breeding waterfowl
No abstract available.
Authors
Douglas H. Johnson, J.D. Nichols, M.D. Schwartz
A stochastic population model of mid-continental mallards A stochastic population model of mid-continental mallards
We developed a simulation model that integrates infonnation on factors affecting the population dynamics of mallards in the mid-continental region of the United States. In the model we vary age, body mass, and reproductive and molt status of simulated females. Females use several types of nesting and foraging habitat in 15 geographic areas. Deterministic and stochastic events cause...
Authors
Rolf R. Koford, J.R. Sauer, Douglas H. Johnson, J.D. Nichols, M.D. Samuel
Introduction to the Methods Section Introduction to the Methods Section
No abstract available.
Authors
Gary C. White, J.D. Nichols
Science and Products
Filter Total Items: 417
The 'robust' capture-recapture design allows components of recruitment to be estimated 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...
Authors
K. H. Pollock, W. L. Kendall, J.D. Nichols
Survival rate estimation in the presence of tag loss using joint analysis of capture-recapture and resighting data Survival rate estimation in the presence of tag loss using joint analysis of capture-recapture and resighting data
Studies using resightings of marked birds typically make use of readily-observable tags that are not retained as well as metal legbands. We review methods for estimating survival rate with open capture-recapture / resighting models when tag loss is not negligible. All methods rely on data from double-banding studies, usually carried out as part of the resighting study by application of...
Authors
J.D. Nichols, J.E. Hines
Analyses of banding data Analyses of banding data
No abstract available.
Authors
J.D. Nichols, R. E. Tomlinson
The estimation of exchanges among populations or subpopulations 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
Annual survival rates of adult and immature eastern population tundra swans Annual survival rates of adult and immature eastern population tundra swans
Tundra swans (Cygnus columbianus) of the eastern population were neckbanded in Maryland, North Carolina, and Alaska from 1966 through 1990. These swans were resighted and recaptured during autumn, winter, and spring, 1966-1990. Although the original motivation for this study involved swan movements, we wanted to use the resulting data to test hypotheses about sources of variation in swan...
Authors
James D. Nichols, J. Bart, Roland J. Limpert, William J.L. Sladen, James E. Hines
Estimating transition probabilities for stage-based population projection matrices using capture-recapture data Estimating transition probabilities for stage-based population projection matrices using capture-recapture data
In stage—based demography, animals are often categorized into size (or mass) classes, and size—based probabilities of surviving and changing mass classes must be estimated before demographic analyses can be conducted. In this paper, we develop two procedures for the estimation of mass transition probabilities from capture—recapture data. The first approach uses a multistate capture...
Authors
James D. Nichols, John R. Sauer, Kenneth H. Pollock, Jay B. Hestbeck
Population dynamics of breeding waterfowl Population dynamics of breeding waterfowl
No abstract available.
Authors
Douglas H. Johnson, J.D. Nichols, M.D. Schwartz
A stochastic population model of mid-continental mallards A stochastic population model of mid-continental mallards
No abstract available.
Authors
Rolf R. Koford, J.R. Sauer, Douglas H. Johnson, J.D. Nichols, M.D. Samuel
Population dynamics of breeding waterfowl Population dynamics of breeding waterfowl
No abstract available.
Authors
Douglas H. Johnson, J.D. Nichols, M.D. Schwartz
A stochastic population model of mid-continental mallards A stochastic population model of mid-continental mallards
We developed a simulation model that integrates infonnation on factors affecting the population dynamics of mallards in the mid-continental region of the United States. In the model we vary age, body mass, and reproductive and molt status of simulated females. Females use several types of nesting and foraging habitat in 15 geographic areas. Deterministic and stochastic events cause...
Authors
Rolf R. Koford, J.R. Sauer, Douglas H. Johnson, J.D. Nichols, M.D. Samuel
Introduction to the Methods Section Introduction to the Methods Section
No abstract available.
Authors
Gary C. White, J.D. Nichols