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: 418
Sampling design trade-offs in occupancy studies with imperfect detection: Examples and software Sampling design trade-offs in occupancy studies with imperfect detection: Examples and software
Researchers have used occupancy, or probability of occupancy, as a response or state variable in a variety of studies (e.g., habitat modeling), and occupancy is increasingly favored by numerous state, federal, and international agencies engaged in monitoring programs. Recent advances in estimation methods have emphasized that reliable inferences can be made from these types of studies if
Authors
L.L. Bailey, J.E. Hines, J.D. Nichols, Darryl I. MacKenzie
Patch-occupancy models indicate human activity as major determinant of forest elephant Loxodonta cyclotis seasonal distribution in an industrial corridor in Gabon Patch-occupancy models indicate human activity as major determinant of forest elephant Loxodonta cyclotis seasonal distribution in an industrial corridor in Gabon
The importance of human activity and ecological features in influencing African forest elephant ranging behaviour was investigated in the Rabi-Ndogo corridor of the Gamba Complex of Protected Areas in southwest Gabon. Locations in a wide geographical area with a range of environmental variables were selected for patch-occupancy surveys using elephant dung to assess seasonal presence and...
Authors
R. Buij, W.J. McShea, P. Campbell, M.E. Lee, F. Dallmeier, S. Guimondou, L. Mackaga, N. Guisseougou, S. Mboumba, J.E. Hines, J.D. Nichols, A. Alonso
Making great leaps forward: Accounting for detectability in herpetological field studies Making great leaps forward: Accounting for detectability in herpetological field studies
Detecting individuals of amphibian and reptile species can be a daunting task. Detection can be hindered by various factors such as cryptic behavior, color patterns, or observer experience. These factors complicate the estimation of state variables of interest (e.g., abundance, occupancy, species richness) as well as the vital rates that induce changes in these state variables (e.g...
Authors
Marc J. Mazerolle, Larissa L. Bailey, William L. Kendall, J. Andrew Royle, Sarah J. Converse, James D. Nichols
Intra-guild compensation regulates species richness in desert rodents: comment Intra-guild compensation regulates species richness in desert rodents: comment
No abstract available.
Authors
J.D. Nichols, J.E. Hines, J.R. Sauer, T. Boulinier, E. Cam
The role of local populations within a landscape context: Defining and classifying sources and sinks The role of local populations within a landscape context: Defining and classifying sources and sinks
The interaction of local populations has been the focus of an increasing number of studies in the past 30 years. The study of source-sink dynamics has especially generated much interest. Many of the criteria used to distinguish sources and sinks incorporate the process of apparent survival (i.e., the combined probability of true survival and site fidelity) but not emigration. These...
Authors
J.P. Runge, M.C. Runge, J.D. Nichols
Variation in probability of first reproduction of Weddell seals Variation in probability of first reproduction of Weddell seals
Summary 1. For many species, when to begin reproduction is an important life-history decision that varies by individual and can have substantial implications for lifetime reproductive success and fitness. 2. We estimated age-specific probabilities of first-time breeding and modelled variation in these rates to determine age at first reproduction and understand why it varies in a...
Authors
G.L. Hadley, J.J. Rotella, R.A. Garrott, J.D. Nichols
Science and Products
Filter Total Items: 418
Sampling design trade-offs in occupancy studies with imperfect detection: Examples and software Sampling design trade-offs in occupancy studies with imperfect detection: Examples and software
Researchers have used occupancy, or probability of occupancy, as a response or state variable in a variety of studies (e.g., habitat modeling), and occupancy is increasingly favored by numerous state, federal, and international agencies engaged in monitoring programs. Recent advances in estimation methods have emphasized that reliable inferences can be made from these types of studies if
Authors
L.L. Bailey, J.E. Hines, J.D. Nichols, Darryl I. MacKenzie
Patch-occupancy models indicate human activity as major determinant of forest elephant Loxodonta cyclotis seasonal distribution in an industrial corridor in Gabon Patch-occupancy models indicate human activity as major determinant of forest elephant Loxodonta cyclotis seasonal distribution in an industrial corridor in Gabon
The importance of human activity and ecological features in influencing African forest elephant ranging behaviour was investigated in the Rabi-Ndogo corridor of the Gamba Complex of Protected Areas in southwest Gabon. Locations in a wide geographical area with a range of environmental variables were selected for patch-occupancy surveys using elephant dung to assess seasonal presence and...
Authors
R. Buij, W.J. McShea, P. Campbell, M.E. Lee, F. Dallmeier, S. Guimondou, L. Mackaga, N. Guisseougou, S. Mboumba, J.E. Hines, J.D. Nichols, A. Alonso
Making great leaps forward: Accounting for detectability in herpetological field studies Making great leaps forward: Accounting for detectability in herpetological field studies
Detecting individuals of amphibian and reptile species can be a daunting task. Detection can be hindered by various factors such as cryptic behavior, color patterns, or observer experience. These factors complicate the estimation of state variables of interest (e.g., abundance, occupancy, species richness) as well as the vital rates that induce changes in these state variables (e.g...
Authors
Marc J. Mazerolle, Larissa L. Bailey, William L. Kendall, J. Andrew Royle, Sarah J. Converse, James D. Nichols
Intra-guild compensation regulates species richness in desert rodents: comment Intra-guild compensation regulates species richness in desert rodents: comment
No abstract available.
Authors
J.D. Nichols, J.E. Hines, J.R. Sauer, T. Boulinier, E. Cam
The role of local populations within a landscape context: Defining and classifying sources and sinks The role of local populations within a landscape context: Defining and classifying sources and sinks
The interaction of local populations has been the focus of an increasing number of studies in the past 30 years. The study of source-sink dynamics has especially generated much interest. Many of the criteria used to distinguish sources and sinks incorporate the process of apparent survival (i.e., the combined probability of true survival and site fidelity) but not emigration. These...
Authors
J.P. Runge, M.C. Runge, J.D. Nichols
Variation in probability of first reproduction of Weddell seals Variation in probability of first reproduction of Weddell seals
Summary 1. For many species, when to begin reproduction is an important life-history decision that varies by individual and can have substantial implications for lifetime reproductive success and fitness. 2. We estimated age-specific probabilities of first-time breeding and modelled variation in these rates to determine age at first reproduction and understand why it varies in a...
Authors
G.L. Hadley, J.J. Rotella, R.A. Garrott, J.D. Nichols