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
On the variability of alligator sex ratios On the variability of alligator sex ratios
Samples of alligators from wild and 'farm' populations exhibited disproportionate sex ratios. Males predominated among young alligators from wild populations, whereas females were much more abundant than males in the farm population, where resources were superabundant. These results and other considerations lead us to hypothesize that environmental factors influence sex determination in
Authors
James D. Nichols, R. H. Chabreck
Demography of the Everglade kite: Implications for population management Demography of the Everglade kite: Implications for population management
Simple deterministic and stochastic population modelsi are used to examine the demographic patterns of the Everglade Kite population. These efforts are directed at making inferences about the evolution of the kite life-history pattern, and at providing guidelines for the management of the kite population. The Everglade Kite has apparently evolved high adult survival rates, in partial...
Authors
J.D. Nichols, Gary L. Hensler, P.W. Sykes
Sex-specific differences in winter distribution patterns of canvasbacks Sex-specific differences in winter distribution patterns of canvasbacks
Winter band recovery distributions of North American Canvasbacks (Aythya valisineria) suggested that males and females exhibit comparable degrees of fidelity to general wintering areas. Of birds banded during the winter, the proportion of males was found to be higher in northern than in southern areas. Winter band recovery distributions of birds banded in particular areas during the...
Authors
J.D. Nichols, G.M. Haramis
Inferences regarding survival and recovery rates of winter-banded canvasbacks Inferences regarding survival and recovery rates of winter-banded canvasbacks
Banding and recovery data from 3 populations of winter-banded canvasbacks (Aythya valisineria) were analyzed and survival and recovery rates were estimated. Sex-specific differences in these rates were detected in some populations, and lower survival rates were exhibited by females. Some geographic variation in survival rates was evident, suggesting that canvasbacks should not be managed...
Authors
James D. Nichols, G.Michael Haramis
Mathematical models and population cycles: A critical evaluation of a recent modeling effort Mathematical models and population cycles: A critical evaluation of a recent modeling effort
No abstract available.
Authors
J.D. Nichols, J.B. Hestbeck, W. Conley
Can ducks be managed by regulation? An examination of harvest and survival rates of ducks in relation to hunting Can ducks be managed by regulation? An examination of harvest and survival rates of ducks in relation to hunting
No abstract available.
Authors
J.P. Rogers, J.D. Nichols, F.W. Martin, C.F. Kimball, R.S. Pospahala
Assessment and population management of North American migratory birds Assessment and population management of North American migratory birds
No abstract available.
Authors
F.W. Martin, R.S. Pospahala, J.D. Nichols
A comparison of 2 techniques for estimating deer density A comparison of 2 techniques for estimating deer density
We applied mark-resight and area-conversion methods to estimate deer abundance at a 2,862-ha area in and surrounding the Gettysburg National Military Park and Eisenhower National Historic Site during 1987-1991. One observer in each of 11 compartments counted marked and unmarked deer during 65-75 minutes at dusk during 3 counts in each of April and November. Use of radio-collars and vinyl...
Authors
G.L. Storm, D.F. Cottam, R.H. Yahner, J.D. Nichols
Fifty-sixth Christmas Bird Count. 147. Southern Dorchester County, Md Fifty-sixth Christmas Bird Count. 147. Southern Dorchester County, Md
Summary and Recommendations: We suggest that managers are approaching the limits of their ability to improve waterfowl harvest management, primarily because the information needed to make better decisions is being sacrificed by the current approach to setting regulations. We propose an actively adaptive management strategy in which regulatory decisions play a dominant role in reducing
Authors
Fred A. Johnson, B. Kenneth Williams, J.D. Nichols, J.E. Hines, W. L. Kendall, G.W. Smith, David F. Caithamer
Science and Products
Filter Total Items: 417
On the variability of alligator sex ratios On the variability of alligator sex ratios
Samples of alligators from wild and 'farm' populations exhibited disproportionate sex ratios. Males predominated among young alligators from wild populations, whereas females were much more abundant than males in the farm population, where resources were superabundant. These results and other considerations lead us to hypothesize that environmental factors influence sex determination in
Authors
James D. Nichols, R. H. Chabreck
Demography of the Everglade kite: Implications for population management Demography of the Everglade kite: Implications for population management
Simple deterministic and stochastic population modelsi are used to examine the demographic patterns of the Everglade Kite population. These efforts are directed at making inferences about the evolution of the kite life-history pattern, and at providing guidelines for the management of the kite population. The Everglade Kite has apparently evolved high adult survival rates, in partial...
Authors
J.D. Nichols, Gary L. Hensler, P.W. Sykes
Sex-specific differences in winter distribution patterns of canvasbacks Sex-specific differences in winter distribution patterns of canvasbacks
Winter band recovery distributions of North American Canvasbacks (Aythya valisineria) suggested that males and females exhibit comparable degrees of fidelity to general wintering areas. Of birds banded during the winter, the proportion of males was found to be higher in northern than in southern areas. Winter band recovery distributions of birds banded in particular areas during the...
Authors
J.D. Nichols, G.M. Haramis
Inferences regarding survival and recovery rates of winter-banded canvasbacks Inferences regarding survival and recovery rates of winter-banded canvasbacks
Banding and recovery data from 3 populations of winter-banded canvasbacks (Aythya valisineria) were analyzed and survival and recovery rates were estimated. Sex-specific differences in these rates were detected in some populations, and lower survival rates were exhibited by females. Some geographic variation in survival rates was evident, suggesting that canvasbacks should not be managed...
Authors
James D. Nichols, G.Michael Haramis
Mathematical models and population cycles: A critical evaluation of a recent modeling effort Mathematical models and population cycles: A critical evaluation of a recent modeling effort
No abstract available.
Authors
J.D. Nichols, J.B. Hestbeck, W. Conley
Can ducks be managed by regulation? An examination of harvest and survival rates of ducks in relation to hunting Can ducks be managed by regulation? An examination of harvest and survival rates of ducks in relation to hunting
No abstract available.
Authors
J.P. Rogers, J.D. Nichols, F.W. Martin, C.F. Kimball, R.S. Pospahala
Assessment and population management of North American migratory birds Assessment and population management of North American migratory birds
No abstract available.
Authors
F.W. Martin, R.S. Pospahala, J.D. Nichols
A comparison of 2 techniques for estimating deer density A comparison of 2 techniques for estimating deer density
We applied mark-resight and area-conversion methods to estimate deer abundance at a 2,862-ha area in and surrounding the Gettysburg National Military Park and Eisenhower National Historic Site during 1987-1991. One observer in each of 11 compartments counted marked and unmarked deer during 65-75 minutes at dusk during 3 counts in each of April and November. Use of radio-collars and vinyl...
Authors
G.L. Storm, D.F. Cottam, R.H. Yahner, J.D. Nichols
Fifty-sixth Christmas Bird Count. 147. Southern Dorchester County, Md Fifty-sixth Christmas Bird Count. 147. Southern Dorchester County, Md
Summary and Recommendations: We suggest that managers are approaching the limits of their ability to improve waterfowl harvest management, primarily because the information needed to make better decisions is being sacrificed by the current approach to setting regulations. We propose an actively adaptive management strategy in which regulatory decisions play a dominant role in reducing
Authors
Fred A. Johnson, B. Kenneth Williams, J.D. Nichols, J.E. Hines, W. L. Kendall, G.W. Smith, David F. Caithamer