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
Additional comments on the assumption of homogeneous survival rates in modern bird banding estimation models Additional comments on the assumption of homogeneous survival rates in modern bird banding estimation models
We examined the problem of heterogeneous survival and recovery rates in bird banding estimation models. We suggest that positively correlated subgroup survival and recovery probabilities may result from winter banding operations and that this situation will produce positively biased survival rate estimates. The magnitude of the survival estimate bias depends on the proportion of the...
Authors
James D. Nichols, S.L. Stokes, James E. Hines, M.J. Conroy
Breeding-ground habitat conditions and the survival of mallards Breeding-ground habitat conditions and the survival of mallards
The relationship between habitat conditions in prairie breeding areas of North America and mallard (Anas platyrhynchos) survival rates was investigated. Annual survival-rate estimates for mallards generally were higher during years of high May pond numbers and low mallards-per-pond ratios than during years of low pond numbers and high ratios. This tendency was most pronounced among males...
Authors
James D. Nichols, Richard S. Pospahala, James E. Hines
Regional population inferences for the American woodcock Regional population inferences for the American woodcock
Woodcock (Philohela minor) bandings and recoveries from 1967 to 1977 were analyzed from two large banding reference areas corresponding to existing Eastern and Central harvest units. We examined temporal, age-specific, sex-specific, and geographic variation in both survival and recovery rates, using recently developed stochastic models. Survival rate estimates for females were higher...
Authors
T.J. Dwyer, J.D. Nichols
The Mayfield method of estimating nesting success: A model, estimators and simulation results The Mayfield method of estimating nesting success: A model, estimators and simulation results
Using a nesting model proposed by Mayfield we show that the estimator he proposes is a maximum likelihood estimator (m.l.e.). M.l.e. theory allows us to calculate the asymptotic distribution of this estimator, and we propose an estimator of the asymptotic variance. Using these estimators we give approximate confidence intervals and tests of significance for daily survival. Monte Carlo
Authors
Gary L. Hensler, J.D. Nichols
Importance of structural stability to success of mourning dove nests Importance of structural stability to success of mourning dove nests
Studies of nest-site selection and nesting habitats often involve a "characterization" of nests and of habitats in which nests are found. Our objective in the present work is to identify nest-site characteristics that are associated with variation in components of Mourning Dove (Zenaida macroura) fitness (e.g. the probability of a nest succeeding), as opposed to simply "characterizing"...
Authors
R.A. Coon, J.D. Nichols, H.F. Percival
Remarks on the use of mark-recapture methodology in estimating avian population size Remarks on the use of mark-recapture methodology in estimating avian population size
No abstract available.
Authors
J.D. Nichols, B.R. Noon, S.L. Stokes, J.E. Hines
Science and Products
Filter Total Items: 417
Additional comments on the assumption of homogeneous survival rates in modern bird banding estimation models Additional comments on the assumption of homogeneous survival rates in modern bird banding estimation models
We examined the problem of heterogeneous survival and recovery rates in bird banding estimation models. We suggest that positively correlated subgroup survival and recovery probabilities may result from winter banding operations and that this situation will produce positively biased survival rate estimates. The magnitude of the survival estimate bias depends on the proportion of the...
Authors
James D. Nichols, S.L. Stokes, James E. Hines, M.J. Conroy
Breeding-ground habitat conditions and the survival of mallards Breeding-ground habitat conditions and the survival of mallards
The relationship between habitat conditions in prairie breeding areas of North America and mallard (Anas platyrhynchos) survival rates was investigated. Annual survival-rate estimates for mallards generally were higher during years of high May pond numbers and low mallards-per-pond ratios than during years of low pond numbers and high ratios. This tendency was most pronounced among males...
Authors
James D. Nichols, Richard S. Pospahala, James E. Hines
Regional population inferences for the American woodcock Regional population inferences for the American woodcock
Woodcock (Philohela minor) bandings and recoveries from 1967 to 1977 were analyzed from two large banding reference areas corresponding to existing Eastern and Central harvest units. We examined temporal, age-specific, sex-specific, and geographic variation in both survival and recovery rates, using recently developed stochastic models. Survival rate estimates for females were higher...
Authors
T.J. Dwyer, J.D. Nichols
The Mayfield method of estimating nesting success: A model, estimators and simulation results The Mayfield method of estimating nesting success: A model, estimators and simulation results
Using a nesting model proposed by Mayfield we show that the estimator he proposes is a maximum likelihood estimator (m.l.e.). M.l.e. theory allows us to calculate the asymptotic distribution of this estimator, and we propose an estimator of the asymptotic variance. Using these estimators we give approximate confidence intervals and tests of significance for daily survival. Monte Carlo
Authors
Gary L. Hensler, J.D. Nichols
Importance of structural stability to success of mourning dove nests Importance of structural stability to success of mourning dove nests
Studies of nest-site selection and nesting habitats often involve a "characterization" of nests and of habitats in which nests are found. Our objective in the present work is to identify nest-site characteristics that are associated with variation in components of Mourning Dove (Zenaida macroura) fitness (e.g. the probability of a nest succeeding), as opposed to simply "characterizing"...
Authors
R.A. Coon, J.D. Nichols, H.F. Percival
Remarks on the use of mark-recapture methodology in estimating avian population size Remarks on the use of mark-recapture methodology in estimating avian population size
No abstract available.
Authors
J.D. Nichols, B.R. Noon, S.L. Stokes, J.E. Hines