Pamela K. Yochem, DVM PhD

Chief Science Officer



Major Research Areas

Population Biology, Marine Mammal Health and Disease


  • B.S., Biology, San Diego State University
  • M.S., Ecology, San Diego State University
  • D.V.M., University of California, Davis
  • Ph.D., University of California, Davis

Professional Activities

  • Marine Fisheries Advisory Committee (Department of Commerce);
  • Gulf Coast Ecosystem Restoration Science Program Working Group (Department of Commerce);
  • Advisory Board, Oiled Wildlife Care Network;
  • Chair, HSWRI Institutional Animal Care and Use Committee

University Affiliations

Affiliated Faculty, University of California Davis

Current Research

  • Wildlife disease ecology and epidemiology
  • Marine ecosystem health
  • Wildlife emergency response

Dr. Pam Yochem is the Executive Vice President and Chief Science Officer at Hubbs-Sea World Research Institute (HSWRI) in San Diego, California. Her current research interests include wildlife disease ecology and epidemiology, marine ecosystem health, and wildlife emergency response. Other recent projects include studies of the population biology and foraging ecology of marine mammals and seabirds in the North Pacific and Antarctic. Dr. Yochem is a USDA-accredited veterinarian and is an affiliated faculty member of the Wildlife Health Center at the University of California – Davis. Dr. Yochem chairs the Institutional Animal Care and Use Committee for HSWRI, is a member of the organization’s Fish Health Management Team, and serves on the Advisory Board and the Scientific Advisory Committee for the California Oiled Wildlife Care Network. Past public service appointments include the Unified Port of San Diego’s Environmental Committee, the Marine Fisheries Advisory Committee, which advises the Secretary of Commerce on living marine resource matters, and the Gulf Coast Ecosystem Restoration Science Program Working Group, which provides independent guidance and review to the National Oceanic and Atmospheric Administration Science Advisory Board. She holds a Master’s Degree in Biology from San Diego State University, and a DVM (wildlife emphasis) and PhD (comparative pathology) from the University of California Davis.

Selected Publications

Boyce, W.M., I. Mena, P.K. Yochem, F.M.D. Gulland, A. Garcia-Sastre, N. Moreno, D.R. Perez, A.S. Gonzalez-Reiche and B.S. Stewart.  2013. Influenza A (H1N1)pdm09 virus infection in marine mammals in California. Emerging Microbes and Infections. (doi:10.1038/emi.2013.40)

Castellini, M.A., S.J. Trumble, T.L. Mau, P.K. Yochem, B.S. Stewart and M.A. Koski. 2009. Body and blubber relationships in Antarctic pack-ice seals: Implications for the control of blubber depth.

Physiological and Biochemical Zoology 82: 113-120.

Hunt, T.D., M.H. Ziccardi, F.M.D. Gulland, P.K. Yochem, D.W. Hird, T. Rowles and J.A.K. Mazet. 2008. Health risks for marine mammal workers. Diseases of Aquatic Organisms 81:81-92.

Nollens, H.H., R. Rivera, G. Palacios, J.F.X. Wellehan, J.T. Saliki, S.L. Caseltine, C.R. Smith, E.D. Jensen, J.Hui, W. I. Lipkin, P.K. Yochem, R.S. Wells, J. St. Leger and S. Venn-Watson. 2009. New recognition of Enterovirus infections in bottlenose dolphins (Tursiops truncatus). Veterinary Microbiology 139:170-175.

Quinley, N., J.A.K. Mazet, R. Rivera, T.L. Schmitt, C. Dold, J. McBain, V. Fritsch and P.K. Yochem. 2013. Serologic response of harbor seals (Phoca vitulina) to vaccination with a recombinant canine distemper vaccine.  Journal of Wildlife Diseases 49:579-586.

Silbernagel, C., P.K. Yochem. 2016. Effectiveness of the anesthetic AQUI-S®  20E in marine finfish and elasmobranchs. Journal of Wildlife Diseases 52:S96-S103.

Venn-Watson, S., C. Benham, F.M.D. Gulland, C.R. Smith, J. St. Leger, P. Yochem, H. Nollens, U. Blas-Machado, J. Saliki, K. Colegrove, J.F.X. Wellehan, Jr., and R. Rivera.  2012.  Clinical relevance of novel Otarine herpesvirus-3 in California sea lions (Zalophus californianus): lymphoma, esophageal ulcers, and strandings.  Veterinary Research 2012 43:85. (doi:10.1186/1297-9716-43-85)

Worthy, G.A.J., T.A.M. Worthy, P.K. Yochem and C. Dold. 2014. Basal metabolism of an adult male killer whale (Orcinus orca).  Marine Mammal Science 30:1229-1237

Ylitalo, G.M., M. Myers, B.S. Stewart, P.K. Yochem, R. Braun, L. Kashinsky, D. Boyd, G.A. Antonelis, S. Atkinson, A.A. Aguirre and M.M. Krahn. 2008. Organochlorine contaminants in endangered Hawaiian monk seals from four subpopulations in the Northwestern Hawaiian Islands. Marine Pollution Bulletin 56:231-244.

Yochem, P.K., F.M.D. Gulland, B.S. Stewart, M. Haulena, J.A.K. Mazet and W.M. Boyce. 2008. Thyroid function testing in elephant seals in health and disease. General and Comparative Endocrinology 155:627-632.

Yochem, P.K., B.S. Stewart, T. Gelatt, and D. Siniff. 2009. Health assessment of Weddell seals (Leptonychotes weddellii) in McMurdo Sound, Antarctica. Pp. 123-138 In: Diseases of Antarctic Wildlife. K.R. Kerry and M.J. Riddle (eds.). Springer-Verlag, Berlin.

Yochem, P.K., B.S. Stewart, J.A.K. Mazet and W.M. Boyce. 2008. Hematologic and serum biochemical profile of the northern elephant seal (Mirounga angustirostris): variation with age, sex and season. Journal of Wildlife Diseases 44:911-921.

Yochem, P.K. and B.S. Stewart. 2018. Hair and fur. Pp. 447-448 In: Encyclopedia of MarineMammals. B. Wursig, G.W. Thewissen and K.M. Kovacs (eds.) Third Edition. Academic Press, San Diego.

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