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
Survival and band recovery rates of sympatric American black ducks and mallards
Banding and recovery data from American black ducks (Anas rubripes) and mallards (A. platyrhynchos) banded in the same breeding or wintering areas over the same time periods were used to estimate annual survival and band recovery rates. Recovery rates, based on preseason bandings, were very similar for sympatric black ducks and mallards and exhibited similar patterns of year-to-year variation for
Authors
J. D. Nichols, H.H. Obrecht, J. E. Hines
Survival of young American alligators on a Florida lake
A capture-recapture study was conducted on Orange Lake, Florida, from 1979 through 1984 to estimate survival rates of young in an American alligator (Alligator mississippiensis) populations. Hatchlings remained together in sibling groups (pods) for at least their 1st year and then began to disperse during their 2nd spring and summer. Mortality through mid-November of their 1st year was negligible.
Authors
A.R. Woodward, T.C. Hines, C.L. Abercrombie, J. D. Nichols
A field comparison of nested grid and trapping web density estimators
The usefulness of capture-recapture estimators in any field study will depend largely on underlying model assumptions and on how closely these assumptions approximate the actual field situation. Evaluation of estimator performance under real-world field conditions is often a difficult matter, although several approaches are possible. Perhaps the best approach involves use of the estimation metho
Authors
David A. Jett, J. D. Nichols
Density fluctuations in a meadow vole population at the Patuxent Wildlife Research Center
No abstract available.
Authors
David A. Jett, J. D. Nichols
The need for experiments to understand population dynamics of American black ducks
No abstract available.
Authors
D.R. Anderson, K.P. Burnham, J. D. Nichols, M.J. Conroy
Parasitization of meadow voles, Microtus pennsylvanicus (ORD), by American dog ticks, Dermacentor variabilis (Say), and adult tick movement during high host density
The numbers of host-seeking adult American dog ticks, Dermacentor variabilis (Say), in a sweet gum field in Maryland reflected changes in the population density of a host species, the meadow vole, Microtus pennsylvanicus (Ord), which within 1.5 yr fell from an estimated 157 to 8 voles on a 0.8 ha grid. During high vole density, there was no significant difference (P > 0.05) in tick burdens between
Authors
J. F. Carroll, J. D. Nichols
Effects of liberalized harvest regulations on wood ducks in the Atlantic Flyway
Beginning in 1977the FWS provided southern Atlantic Flyway states the opportunity to liberalize wood duck harvest regulations. Harvest subsequently increased throughout the flyway but appeared to be more a function of population growth than changes in regulations. In the South, harvest rate increased only slightly for young males and no decline in average survival was detected. We found no evidenc
Authors
F.A. Johnson, J. E. Hines, F. Montalbano, J. D. Nichols
Effect of Orthene on an unconfined population of the meadow vole (Microtus pennsylvanicus)
The possible impact on Microtus pennsylvanicus of ground applications of Orthene® insecticide was investigated in old-field habitats in northern Maryland during 1982 and 1983. The treatment grids in 1982 and 1983 were sprayed at 0.62 and 0.82 kg active ingredient/ha, respectively. A capture–recapture design robust to unequal capture probabilities was utilized to estimate population size, survival,
Authors
David A. Jett, James D. Nichols, James E. Hines
The relationship between body mass and survival of wintering canvasbacks
Mass and recapture histories of 6,000 Canvasbacks (Aythya valisineria) banded in upper Chesapeake Bay were used to test two hypotheses: (1) early-winter body mass is associated with the probability of surviving the winter, and (2) early-winter body mass is associated with annual survival probability. Data were analyzed by a binary regression method that treated mass as a continuous variable and es
Authors
G. M. Haramis, J. D. Nichols, K. H. Pollock, J. E. Hines
On the use of enumeration estimators for interspecific comparisons with comments on a 'trappability' estimator
No abstract available.
Authors
J. D. Nichols
Estimating nest detection probabilities for white-winged dove nest transects in Tamaulipas, Mexico
Nest transects in nesting colonies provide one source of information on White-winged Dove (Zenaida asiatica asiatica) population status and reproduction. Nests are counted along transects using standardized field methods each year in Texas and northeastern Mexico by personnel associated with Mexico's Office of Flora and Fauna, the Texas Parks and Wildlife Department, and the U.S. Fish and Wildlife
Authors
J. D. Nichols, R. E. Tomlinson, G. Waggerman
Science and Products
Filter Total Items: 401
Survival and band recovery rates of sympatric American black ducks and mallards
Banding and recovery data from American black ducks (Anas rubripes) and mallards (A. platyrhynchos) banded in the same breeding or wintering areas over the same time periods were used to estimate annual survival and band recovery rates. Recovery rates, based on preseason bandings, were very similar for sympatric black ducks and mallards and exhibited similar patterns of year-to-year variation for
Authors
J. D. Nichols, H.H. Obrecht, J. E. Hines
Survival of young American alligators on a Florida lake
A capture-recapture study was conducted on Orange Lake, Florida, from 1979 through 1984 to estimate survival rates of young in an American alligator (Alligator mississippiensis) populations. Hatchlings remained together in sibling groups (pods) for at least their 1st year and then began to disperse during their 2nd spring and summer. Mortality through mid-November of their 1st year was negligible.
Authors
A.R. Woodward, T.C. Hines, C.L. Abercrombie, J. D. Nichols
A field comparison of nested grid and trapping web density estimators
The usefulness of capture-recapture estimators in any field study will depend largely on underlying model assumptions and on how closely these assumptions approximate the actual field situation. Evaluation of estimator performance under real-world field conditions is often a difficult matter, although several approaches are possible. Perhaps the best approach involves use of the estimation metho
Authors
David A. Jett, J. D. Nichols
Density fluctuations in a meadow vole population at the Patuxent Wildlife Research Center
No abstract available.
Authors
David A. Jett, J. D. Nichols
The need for experiments to understand population dynamics of American black ducks
No abstract available.
Authors
D.R. Anderson, K.P. Burnham, J. D. Nichols, M.J. Conroy
Parasitization of meadow voles, Microtus pennsylvanicus (ORD), by American dog ticks, Dermacentor variabilis (Say), and adult tick movement during high host density
The numbers of host-seeking adult American dog ticks, Dermacentor variabilis (Say), in a sweet gum field in Maryland reflected changes in the population density of a host species, the meadow vole, Microtus pennsylvanicus (Ord), which within 1.5 yr fell from an estimated 157 to 8 voles on a 0.8 ha grid. During high vole density, there was no significant difference (P > 0.05) in tick burdens between
Authors
J. F. Carroll, J. D. Nichols
Effects of liberalized harvest regulations on wood ducks in the Atlantic Flyway
Beginning in 1977the FWS provided southern Atlantic Flyway states the opportunity to liberalize wood duck harvest regulations. Harvest subsequently increased throughout the flyway but appeared to be more a function of population growth than changes in regulations. In the South, harvest rate increased only slightly for young males and no decline in average survival was detected. We found no evidenc
Authors
F.A. Johnson, J. E. Hines, F. Montalbano, J. D. Nichols
Effect of Orthene on an unconfined population of the meadow vole (Microtus pennsylvanicus)
The possible impact on Microtus pennsylvanicus of ground applications of Orthene® insecticide was investigated in old-field habitats in northern Maryland during 1982 and 1983. The treatment grids in 1982 and 1983 were sprayed at 0.62 and 0.82 kg active ingredient/ha, respectively. A capture–recapture design robust to unequal capture probabilities was utilized to estimate population size, survival,
Authors
David A. Jett, James D. Nichols, James E. Hines
The relationship between body mass and survival of wintering canvasbacks
Mass and recapture histories of 6,000 Canvasbacks (Aythya valisineria) banded in upper Chesapeake Bay were used to test two hypotheses: (1) early-winter body mass is associated with the probability of surviving the winter, and (2) early-winter body mass is associated with annual survival probability. Data were analyzed by a binary regression method that treated mass as a continuous variable and es
Authors
G. M. Haramis, J. D. Nichols, K. H. Pollock, J. E. Hines
On the use of enumeration estimators for interspecific comparisons with comments on a 'trappability' estimator
No abstract available.
Authors
J. D. Nichols
Estimating nest detection probabilities for white-winged dove nest transects in Tamaulipas, Mexico
Nest transects in nesting colonies provide one source of information on White-winged Dove (Zenaida asiatica asiatica) population status and reproduction. Nests are counted along transects using standardized field methods each year in Texas and northeastern Mexico by personnel associated with Mexico's Office of Flora and Fauna, the Texas Parks and Wildlife Department, and the U.S. Fish and Wildlife
Authors
J. D. Nichols, R. E. Tomlinson, G. Waggerman