Perry Williams

Photo of Perry Williams, Extension

Perry Williams

Associate Professor

Summary

Research

Statistical and mathematical methods for estimating population processes to improve wildlife management and conservation.

 

Teaching

Wildlife Population Dynamics (Undergrad)

Hierarchical Modeling for Natural Resources (Grad)

Education

B.A. Saint Olaf College 2006 - Biology
M.S. University of Minnesota 2008 - Wildlife Ecology
M.S. Colorado State University 2015 - Statistics
Ph.D. Colorado State University 2016 - Wildlife Ecology

News & Journal Articles, Fact Sheets, Reports...

Book Chapter(s)
Decision making and monitoring strategies in natural resource management and conservation. Gerber, B., Williams, P. J. 2020, In Yeqiao Wang (Ed.), Handbook of Natural Resources, Second Edition. CRC Press
Bulletins
Use of private lands for foraging by California spotted owls in the central Sierra Nevada. Williams, P. J., S. H. Whitmore, and R. J. Gutierrez. 2014, Wildlife Society Bulletin 38:705-709.
Occupancy dynamics of breeding crawfish frogs in southeastern Indiana. Williams, P. J., J. R. Robb, and D. R. Karns. 2012, Wildlife Society Bulletin 36:350-357
Journals
Comparing contemporary models to traditional indices to estimate abundance of desert bighorn sheep Blum, M. E., Buderman, F. E., Bennett, J. R., Stewart, K. M., Cox, M., & Williams, P. J. 2024, The Journal of Wildlife Management, 88(2), e22517
Rayleigh step-selection functions and connections to continuous-time mechanistic movement models Eisaguirre, J.M., Williams, P.J. & Hooten, M.B. 2024, Mov Ecol 12, 14
A hierarchical modelling framework for estimating individual- and population-level reproductive success from movement data. Eisaguirre, J. M., Williams, P. J., Brockman, J. C., Lewis, S. B., Barger, C. P., Breed, G. A., & Booms, T. L. 2023, Methods in Ecology and Evolution, 14(8), 2110-2122
Informing management of recovering predators and their prey with ecological diffusion models. Eisaguirre, J. M., Williams, P. J., Lu, X., Kissling, M. L., Schuette, P. A., Weitzman, B. P., Beatty, W. S., Esslinger, G. G., Womble, J. N., & Hooten, M. B. 2023, Frontiers in Ecology and the Environment, 21(10), 479-488
Henslow’s Sparrow shows positive response to prescribed fire rotation Keating, M. P., Williams, P. J., Robb, J. R., Buderman, F. E., Lewis, J. P., Vanosdol, T., & Harer, R. 2023, Ornithological Applications, 125(3)
Embracing asymmetry in nature: How to account for skewness in ecological data. Williams, P. J., Lu, X., Scharf, H. R., & Hooten, M. B. 2023, Ecological Informatics, 75, 102085
Constructing flexible, identifiable, and interpretable statistical models for binary data Scharf, HR, X Lu, PJ Williams, and MB Hooten 2022, International Statistical Review 90:328-345
Estimating survival and adoption rates of dependent juveniles Street, P, TV Riecke, PJ Williams, TL Behnke, and JS Seidiger 2022, Ecology and Evolution, Volume12, Issue6 June 2022 e9005
Recursive Bayesian computation facilitates adaptive optimal design in ecological studies. Leach, C. B., Williams, P. J., Eisaguirre, J. M., Womble, J. N., Bower, M. R., & Hooten, M. B. 2021, Ecology, Volume103, Issue2
Individual heterogeneity in fitness in a long-lived herbivore. Lohman, M. G., Riecke, T. V., Williams, P. J., & Sedinger, J. S. 2021, Ecology and Evolution, 11(21), 15164–15173
Diffusion modeling reveals effects of multiple release sites and human activity on a recolonizing apex predator. Williams, P. J., Eisaguirre, J. M., Lu, X., Kissling, M. L., Beatty, W. S., Esslinger, G. G., … Hooten, M. B. 2021, Movement Ecology, 9(34)
Harbor seals as sentinels of ice dynamics in tidewater glacier fjords. Womble, J. N., Williams, P. J., McNabb, R. W., Prakash, A., Gens, R., Sedinger, B. S., & Acevedo, C. R. 2021, Frontiers in Marine Science, 8
Long-term research and hierarchical models reveal consistent fitness costs of being the last egg in a clutch. Acevedo, C. R., Riecke, T. V., Leach, A. G., Lohman, M., Williams, P. J., Sedinger, J. S. 2020, Journal of Animal Ecology, 89(8), 1978-1987
Nonlinear reaction-diffusion process models improve inference for population dynamics. Lu, X., Williams, P. J., Hooten, M., Powell, J., Womble, J., Bower, M. 2020, Environmetrics, 31(3), e2604
Estimating reproduction and survival of unmarked juveniles from marked parents. Williams, P. J., Schroeder, C., Jackson, P. 2020, Journal of Agricultural, Biological, and Environmental Statistics
The rise of an apex predator following deglaciation. Williams, P. J., Hooten, M. B., Esslinger, G. G., Womble, J. N., Bodkin, J. L., Bower, M. R. 2019, Diversity and Distributions, 25(6), 895-908.
Model Selection using Multi-Objective Optimization. Williams, P. J., Kendall, W. L., Hooten, M. B. 2019, Ecological Modelling, 404, 21-26
A guide to Bayesian model checking for ecologists. Conn, P., Johnson, D., Williams, P. J., Melin, S., Hooten, M. 2018, Ecological Monographs Volume 88, Issue 4
Monitoring dynamic spatio-temporal ecological processes optimally. Williams, P. J., M. B. Hooten, J. N. Womble, G. G. Esslinger, and M. R. Bower. 2018, Ecology 99:524-535
A guide to multi-objective optimization for ecological problems. Williams, P. J., and W. L. Kendall. 2017, Ecological Modelling 343:54-67
Estimating occupancy and abundance using aerial images with imperfect detection. Williams, P. J., M. B. Hooten, J. N. Womble, and M. R. Bower. 2017, Methods in Ecology and Evolution 8:1679-1689
An integrated data model to estimate spatio-temporal occupancy, abundance, and colonization dynamics. Williams, P. J., M. B. Hooten, J. N. Womble, G. G. Esslinger, M. R. Bower, and T. J. Hefley. 2017, Ecology 98:328-336
Combining statistical inference and decisions in ecology. Williams, P. J., and M. B. Hooten. 2016, Ecological Applications 26: 1930-194
Primates and Cameras: Non-invasive sampling to make population-level inferences while accounting for imperfect detection. Gerber, B. D., P. J. Williams, and L. L. Bailey. 2014, International Journal of Primatology 35:841-858
Surveying a threatened amphibian species through a narrow detection window. Williams, P. J., N. J. Engbrecht, J. R. Robb, V. C. K. Terrell, and M. J. Lannoo. 2013, Copiea 2013:552-561
Habitat selection by crawfish frogs (Lithobates areolatus) in a large mixed grassland/forest habitat. Williams, P. J., J. R. Robb, and D. R. Karns. 2012, Journal of Herpetology 46:682-688
Intraspecific density dependence in larval development of the crawfish frog, Lithobates areolatus. Williams, P. J., J. R. Robb, R. H. Kappler, T. E Piening, and D. R. Karns. 2012, Herpetological Review 43:36-38