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Mark S. Udevitz Title: Research Statistician (Biology) Address: 4210 University Dr., Anchorage, AK 99508-4626 Phone: (907) 786-7083 Fax: (907) 786-7150 Email: mudevitz@usgs.gov

Areas of Specialization and/or Research Interests

Methods for sampling, estimating parameters, and modeling dynamics of wildlife populations.

Significant Recent Publications

Udevitz, M. S. and P. J. P. Gogan. 2012. Estimating survival rates with time series of standing age-structure data. Ecology 93(4):726-732. doi: 10.1890/11-1766.1

Speckman, S. G., V. I. Chernook, D. M. Burn, M. S. Udevitz, A. A. Kochnev, A. Vasilev, C. V. Jay, A. Lisovsky, A. S. Fischbach, and , R. B. Benter. 2011. Results and evaluation of a survey to estimate Pacific walrus population size, 2006. Marine Mammal Science 27(3):514-553. doi: 10.1111/j.1748-7692.2010.00419.x.

Jay, C. V., M. S. Udevitz, R. Kwok, A. S. Fischbach, and D. C. Douglas. 2010. Divergent movements of walrus and sea ice in the Northern Bering Sea. Marine Ecology Progress Series 407:293-302.

Burn, D. B., M. S. Udevitz, S. G. Speckman, R. B. Benter. 2009. An improved procedure for detection on enumeration of walrus signatures in airborne thermal imagery. International Journal of Applied Earth Observation and Geoinformation 11(5):324-333.

Udevitz, M. S., C. V. Jay, A. S. Fischbach, and J. L. Garlich-Miller. 2009. Modeling haul-out behavior of walruses in Bering Sea ice. Canadian Journal of Zoology 87(12):1111-1128.

Udevitz, M. S., D. M. Burn, and M. A. Webber. 2008. Estimation of walrus populations on sea ice with infrared imagery and aerial photography. Marine Mammal Science 24:57-70.

Udevitz, M. S., B. Shults, L. G. Adams, and C. Kleckner. 2006. Evaluation of aerial survey methods for Dall's sheep in Alaska. Wildlife Society Bulletin 34:732-740.

Burn, D. M., M. A. Webber, and M. S. Udevitz. 2006. Application of airborne thermal imagery to surveys of Pacific walrus. Wildlife Society Bulletin 34(1):51-58.

Densmore, R. V., C. R. Ely, K. S. Bollinger, S. Kratzer, M. S. Udevitz, D. J. Fehringer, and T. C. Rothe. 2006. Nesting habitat of the Tule greater white-fronted goose, Anser albifrons elgasii. Wildlfowl 56:37-51.

Udevitz, M. S., C. V. Jay, and M. B. Cody. 2005. Observer variability in pinniped counts: ground-based enumeration of walruses at haul-out sites. Marine Mammal Science 21(1):108-120.

Kleckner, C., M. Udevitz, L. Adams, and B. Shults. 2003. Demography of Dall’s sheep in northwestern Alaska. Arctic Research 16:68-73.

Udevitz, M. S. 2002. Abundance: population size and density estimation. Pages 4-11 in A. H. El-Shaarawi and W. W. Piegorsch, editors. Encyclopedia of Environmetrics, Volume 1. John Wiley & Sons, New York, New York.

Udevitz, M. S. 2002. Change-in-ratio. Pages 322-324 in A. H. El-Shaarawi and W. W. Piegorsch, editors. Encyclopedia of Environmetrics, Volume 1. John Wiley & Sons, New York, New York.

Udevitz, M. S., J. R. Gilbert, and G. A. Fedoseev. 2001. Comparison of methods used to estimate numbers of walruses on sea ice. Marine Mammal Science 17(3):601-616.

Bodkin, J. L., and M. S. Udevitz. 1999. An aerial survey method to estimate sea otter abundance. Pages 13-26 in G. W. Garner, S. C. Amstrup, J. L. Laake, B. F. J. Manly, L. L. McDonald and D. G. Robertson, editors. Marine Mammal Survey and Assessment Methods. A. A. Balkema, Rotterdam, Netherlands.

Udevitz, M. S. 1999. Modeling variability in replicated surveys at aggregation sites. Pages 167-177 in G. W. Garner, S. C. Amstrup, J. L. Laake, B. F. J. Manly, L. L. McDonald and D. G. Robertson, editors. Marine Mammal Survey and Assessment Methods. A. A. Balkema, Rotterdam, Netherlands.

Udevitz, M. S., and B. E. Ballachey. 1998. Estimating survival rates with age-structure data. Journal of Wildlife Management 62(2):779-792.

Websites of Interest

http://alaska.usgs.gov/science/biology/biometrics/index.html