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Publications

2014

Jay, C. V., J. M. Grebmeier, A. S. Fischbach, T. L. McDonald, L. W. Cooper, and F. Hornsby. 2014. Pacific walrus (Odobenus rosmarus divergens) resource selection in the northern Bering Sea. PLoS One 9(4):e93035. doi: 10.1371/journal.pone.0093035

Sonsthagen, S. A., K. Fales, C. V. Jay, G. K. Sage, and S. L. Talbot. 2014. Spatial variation and low diversity in the major histocompatibility complex in walrus (Odobenus rosmarus). Polar Biology 37(4):497-506. doi:10.1007/s00300-014-1450-9

Taylor, R. L. and M. S. Udevitz. In press. Demography of the Pacific walrus (Odobenus rosmarus divergens): 1974-2006. Marine Mammal Science. doi:10.1111/mms.12156

2013

Monson, D. H., M. S. Udevitz, and C. V. Jay. 2013. Estimating age ratios and size of Pacific walrus herds on coastal haulouts using video imaging. PLoS One 8(7):e69806. doi:10.1371/journal.pone.0069806

Udevitz, M. S., R. T. Taylor, J. L. Garlich-Miller, L. T. Quakenbush, and J. Snyder. 2013. Potential population-level effects of increased haulout-related mortality of Pacific walrus calves. Polar Biology 36:291-298. doi: 10.1007/s00300-012-1259-3

2012

Jay, C. V., A. S. Fischbach, and A. A. Kochnev. 2012. Walrus areas of use in the Chukchi Sea during sparse sea ice cover. Marine Ecology Progress Series 468:1-13. doi: 10.3354/meps10057

Noren, S.R., M.S. Udevitz, and C.V. Jay. 2012. Bioenergetics model for estimating food requirements of female Pacific walruses (Odobenus rosmarus divergens). Marine Ecology Progress Series 460:261-275

Oakley, K., M. Whalen, D. Douglas, M. Udevitz, T. Atwood, and C. Jay.  2012.  Polar bear and walrus response to the rapid decline in Arctic sea ice. U.S. Geological Survey Fact Sheet 2012-3131. 4 pp.

Sonsthagen, S. A., C. V. Jay, A. S. Fischbach, G. K. Sage, and S. L. Talbot. 2012. Spatial genetic structure and asymmetrical gene flow within the Pacific walrus. Journal of Mammalogy 93(6):1512-1524. doi: 10.1644/11-MAMM-A-344.1

2011

Jay, C. V, B. G. Marcot, and D. C. Douglas. 2011. Projected status of the Pacific walrus (Odobenus rosmarus divergens) in the twenty-first century. Polar Biology 34(7):1065-1084. doi: 10.1007/s00300-011-0967-4 [1.72 MB pdf] [Supplemental Material - 240 kb pdf]

2010

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. doi: 10.3354/meps08575 [408 kb pdf]

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. 2010. 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 [Russian version - 2.3 mb pdf]

2009

Burn, D. B., M. S. Udevitz, S. G. Speckman, and R. B. Benter. 2009. An improved procedure for detection and enumeration of walrus signatures in airborne thermal imagery. International Journal of Applied Earth Observation and Geoinformation 11:324-333. doi: 10.1016/j.jag.2009.05.004

Fischbach, A. S., D. H. Monson, and C. V. Jay. 2009. Enumeration of Pacific walrus carcasses on beaches of the Chukchi Sea in Alaska following a mortality event, September 2009. U.S. Geological Survey Open-File Report 2009-1291:10.

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 87:1111-1128. doi: 10.1139/Z09-098 [497 kb pdf]

2008

Fischbach, A. S., C. V. Jay, J. V. Jackson, L. W. Andersen, G. K. Sage, and S. L. Talbot. 2008. Molecular method for determining sex of walruses. Journal of Wildlife Management 72:1808-1812. doi: 10.2193/2007-413 [525 kb pdf]

Jay, C. V. and A. S. Fischbach. 2008. Pacific walrus response to Arctic sea ice losses. U.S. Geological Fact Sheet 2008-3041. [1.03 mb pdf] [Russian Version - 774 kb pdf]

Jay, C. V., P. M. Outridge, and J. L. Garlich-Miller. 2008. Indication of two Pacific walrus stocks from whole tooth elemental analysis. Polar Biology 31:933-943. doi: 10.1007/s00300-008-0432-1 [522 kb pdf]

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(1):57-70. doi: 10.1111/j.1748-7692.2007.00169.x [865 kb pdf]

2006

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. doi: 10.2193/0091-7648(2006)34[51:AOATIT]2.0.CO;2 [312 kb pdf]

Kucklick, J. R., M. M. Krahn, P. R. Becker, B. J. Porter, M. M. Schantz, G. S. York, T. M. O'Hara, and S. A. Wise. 2006. Persistent organic pollutants in Alaskan ringed seal (Phoca hispida) and walrus (Odobenus rosmarus) blubber. Journal of Environmental Monitoring 8(8):848-854. doi: 10.1039/B602379G [618 kb pdf]

Jay, C. V., M. P. Heide-Jørgensen, A. S. Fischbach, M. V. Jensen, D. F. Tessler, and A. V. Jensen. 2006. Comparison of remotely deployed satellite radio transmitters on walruses. Marine Mammal Science 22(1):226-236. doi: 10.1111/j.1748-7692.2006.00018.x [978 kb pdf]

2005

Bornhold, B. D., C. V. Jay, R. McConnaughey, G. Rathwell, K. Rhyna, and W. Collins. 2005. Walrus foraging marks on the seafloor in Bristol Bay, Alaska – a reconnaissance survey. Geo-Marine Letters 25:293-299. doi: 10.1007/s00367-004-0205-y [540 kb pdf]

Jay, C. V., and S. Hills. 2005. Movements of walruses radio-tagged in Bristol Bay, Alaska. Arctic 58(2):192-202. [2.24 mb pdf]

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. doi: 10.1111/j.1748-7692.2005.tb01211.x [540 kb pdf]

2003

Mulcahy, D. M., P. A. Tuomi, G. W. Garner, and C. V. Jay. 2003. Immobilization of free–ranging male Pacific walruses (Odobenus rosmarus divergens) with carfentanil citrate and naltrexone hydrochloride. Marine Mammal Science 19(4):846-850. doi: 10.1111/j.1748-7692.2003.tb01135.x [337 kb pdf]

2002

Jay, C. V., and G. W. Garner. 2002. Performance of a satellite-linked GPS on Pacific walruses (Odobenus rosmarus divergens). Polar Biology 25:235-237. doi: 10.1007/s00300-001-0338-7 [75 kb pdf]

2001

Jay, C. V., S. D. Farley, and G. W. Garner. 2001. Summer diving behavior of male walruses in Bristol Bay, Alaska. Marine Mammal Science 17(3):617-631. doi: 10.1111/j.1748-7692.2001.tb01008.x [1.15 mb pdf]

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. doi: 10.2193/0091-7648(2006)34[51:AOATIT]2.0.CO;2

2000

Garlich-Miller, J., and C. V. Jay (eds.). 2000. Proceedings of a workshop concerning walrus survey methods, Anchorage, Alaska, March 27-28, 2000. Technical Report MMM 00-2, USFWS Marine Mammals Management, Anchorage, Alaska. 92 pp. [12.9 mb pdf]

pre-2000

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, D. G. Robertson, eds. Marine mammal survey and assessment methods. A. A. Balkema, Rotterdam, Netherlands. [1 mb pdf]

Jay, C. V., T. L. Olson, G. W. Garner, and B. E. Ballachey. 1998. Response of Pacific walruses to disturbances from capture and handling activities at a haul-out in Bristol Bay, Alaska. Marine Mammal Science 14(4):819-828. doi: 10.1111/j.1748-7692.1998.tb00765.x [411 kb pdf]

Scribner, K. T., S. Hills, S. R. Fain, and M. A. Cronin. 1997. Population genetics studies of the walrus (Odobenus rosmarus): A summary and interpretation of results and research needs. Molecular Genetics of Marine Mammals, Special Publication 3:173-184. [1.4 mb pdf]

Douglas, D. C., M. S. Udevitz, J. R. Gilbert, and D. O. Hunter. 1991. Evaluation of airborne videography for enumerating Pacific walruses (Odobenus rosmarus divergens) on sea-ice haulouts. Pages 507-513 in Proc. Resour. Technology 90, Int. Symp. on Advanced Technology in Nat. Resour. Manage. Am. Soc. Photogram. and Remote Sensing, Falls Church, Virginia. [495 kb pdf]

 


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