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: 401
Compensatory mortality in waterfowl populations: A review of the evidence and implications for research and management
No abstract available.
Authors
J. D. Nichols, M.J. Conroy, D.R. Anderson, K.P. Burnham
Effects of permanent trap response in capture probability on Jolly-Seber capture-recapture model estimates
The authors examine bias in Jolly-Seber estimates of survival rate and population size resulting from permanent trap response in capture probability.
Authors
J. D. Nichols, J. E. Hines, K. H. Pollock
Observer visitation frequency and success of mourning dove nests: A field experiment
Field studies of nesting success generally require visits by the investigator to the nests under study. Such visits may themselves influence nesting success, however, and this possibility has been discussed and investigated by a number of workers with a variety of bird species. Livezey (1980) reviewed the relevant literature for duck nests and noted that most studies failed to demonstrate differen
Authors
J. D. Nichols, H.F. Percival, R.A. Coon, M.J. Conroy, Gary L. Hensler, J. E. Hines
The use of a robust capture-recapture design in small mammal population studies: A field example with Microtus pennsylvanicus
The robust design of Pollock (1982) was used to estimate parameters of a Maryland M. pennsylvanicus population. Closed model tests provided strong evidence of heterogeneity of capture probability, and model M eta (Otis et al., 1978) was selected as the most appropriate model for estimating population size. The Jolly-Seber model goodness-of-fit test indicated rejection of the model for this data se
Authors
James D. Nichols, Kenneth H. Pollock, James E. Hines
The use of auxiliary variables in capture-recapture and removal experiments
The dependence of animal capture probabilities on auxiliary variables is an important practical problem which has not been considered in the development of estimation procedures for capture-recapture and removal experiments. In this paper the linear logistic binary regression model is used to relate the probability of capture to continuous auxiliary variables. The auxiliary variables could be en
Authors
K. H. Pollock, J. E. Hines, J. D. Nichols
Testing for variation in taxonomic extinction probabilities: a suggested methodology and some results
Several important questions in evolutionary biology and paleobiology involve sources of variation in extinction rates. In all cases of which we are aware, extinction rates have been estimated from data in which the probability that an observation (e.g., a fossil taxon) will occur is related both to extinction rates and to what we term encounter probabilities. Any statistical method for analyzing f
Authors
M.J. Conroy, J. D. Nichols
Program LINLOGN users instructions
No abstract available.
Authors
J. E. Hines, K. H. Pollock, J. D. Nichols
The relationship between harvest and survival rates of mallards: A straightforward approach with partitioned data sets
We randomly partitioned mallard (Anas platyrhynchos) bandings and recoveries from each of a number of selected reference areas into 2 groups and estimated survival and harvest rates for each area and group. This procedure produced independent vectors of survival- and harvest-rate estimates, which were used to test the general hypothesis that mallard survival and harvest rates were inversely relate
Authors
J. D. Nichols, J. E. Hines
Estimating taxonomic diversity, extinction rates, and speciation rates from fossil data using capture-recapture models
Capture-recapture models can be used to estimate parameters of interest from paleobiological data when encouter probabilities are unknown and variable over time. These models also permit estimation of sampling variances and goodness-of-fit tests are available for assessing the fit of data to most models. The authors describe capture-recapture models which should be useful in paleobiological anal
Authors
J. D. Nichols, K. H. Pollock
Estimation methodology in contemporary small mammal capture-recapture studies
Estimators of population size and survival rate based on the Jolly-Seber capture-recapture model and the “enumeration method” are described. Enumeration estimators are shown to estimate complicated functions of capture and survival probabilities and, in the case of the population size estimator, population size. Frequently-listed reasons for preferring enumeration estimators are discussed and the
Authors
J. D. Nichols, K. H. Pollock
Afternoon closure of hunting and recovery rates of mallards banded in Minnesota
No abstract available.
Authors
R.E. Kirby, J. E. Hines, J. D. Nichols
Sample size estimates: A preliminary analysis of sample sizes required for mark-recovery and mark-resighting studies of manatees (Trichechus manatus) in Florida
No abstract available.
Authors
J.M. Packard, J. D. Nichols
Science and Products
Filter Total Items: 401
Compensatory mortality in waterfowl populations: A review of the evidence and implications for research and management
No abstract available.
Authors
J. D. Nichols, M.J. Conroy, D.R. Anderson, K.P. Burnham
Effects of permanent trap response in capture probability on Jolly-Seber capture-recapture model estimates
The authors examine bias in Jolly-Seber estimates of survival rate and population size resulting from permanent trap response in capture probability.
Authors
J. D. Nichols, J. E. Hines, K. H. Pollock
Observer visitation frequency and success of mourning dove nests: A field experiment
Field studies of nesting success generally require visits by the investigator to the nests under study. Such visits may themselves influence nesting success, however, and this possibility has been discussed and investigated by a number of workers with a variety of bird species. Livezey (1980) reviewed the relevant literature for duck nests and noted that most studies failed to demonstrate differen
Authors
J. D. Nichols, H.F. Percival, R.A. Coon, M.J. Conroy, Gary L. Hensler, J. E. Hines
The use of a robust capture-recapture design in small mammal population studies: A field example with Microtus pennsylvanicus
The robust design of Pollock (1982) was used to estimate parameters of a Maryland M. pennsylvanicus population. Closed model tests provided strong evidence of heterogeneity of capture probability, and model M eta (Otis et al., 1978) was selected as the most appropriate model for estimating population size. The Jolly-Seber model goodness-of-fit test indicated rejection of the model for this data se
Authors
James D. Nichols, Kenneth H. Pollock, James E. Hines
The use of auxiliary variables in capture-recapture and removal experiments
The dependence of animal capture probabilities on auxiliary variables is an important practical problem which has not been considered in the development of estimation procedures for capture-recapture and removal experiments. In this paper the linear logistic binary regression model is used to relate the probability of capture to continuous auxiliary variables. The auxiliary variables could be en
Authors
K. H. Pollock, J. E. Hines, J. D. Nichols
Testing for variation in taxonomic extinction probabilities: a suggested methodology and some results
Several important questions in evolutionary biology and paleobiology involve sources of variation in extinction rates. In all cases of which we are aware, extinction rates have been estimated from data in which the probability that an observation (e.g., a fossil taxon) will occur is related both to extinction rates and to what we term encounter probabilities. Any statistical method for analyzing f
Authors
M.J. Conroy, J. D. Nichols
Program LINLOGN users instructions
No abstract available.
Authors
J. E. Hines, K. H. Pollock, J. D. Nichols
The relationship between harvest and survival rates of mallards: A straightforward approach with partitioned data sets
We randomly partitioned mallard (Anas platyrhynchos) bandings and recoveries from each of a number of selected reference areas into 2 groups and estimated survival and harvest rates for each area and group. This procedure produced independent vectors of survival- and harvest-rate estimates, which were used to test the general hypothesis that mallard survival and harvest rates were inversely relate
Authors
J. D. Nichols, J. E. Hines
Estimating taxonomic diversity, extinction rates, and speciation rates from fossil data using capture-recapture models
Capture-recapture models can be used to estimate parameters of interest from paleobiological data when encouter probabilities are unknown and variable over time. These models also permit estimation of sampling variances and goodness-of-fit tests are available for assessing the fit of data to most models. The authors describe capture-recapture models which should be useful in paleobiological anal
Authors
J. D. Nichols, K. H. Pollock
Estimation methodology in contemporary small mammal capture-recapture studies
Estimators of population size and survival rate based on the Jolly-Seber capture-recapture model and the “enumeration method” are described. Enumeration estimators are shown to estimate complicated functions of capture and survival probabilities and, in the case of the population size estimator, population size. Frequently-listed reasons for preferring enumeration estimators are discussed and the
Authors
J. D. Nichols, K. H. Pollock
Afternoon closure of hunting and recovery rates of mallards banded in Minnesota
No abstract available.
Authors
R.E. Kirby, J. E. Hines, J. D. Nichols
Sample size estimates: A preliminary analysis of sample sizes required for mark-recovery and mark-resighting studies of manatees (Trichechus manatus) in Florida
No abstract available.
Authors
J.M. Packard, J. D. Nichols