Lara Horstmann

Lara Horstmann

Department of Marine Biology

Associate Professor

Fisheries Ecology
Marine Biology
Marine Mammals

College of Fisheries and Ocean Sciences
Institute of Marine Science
232 Irving II
Fairbanks, AK 99775-7220
907-474-7204 (fax)

Office Hours

Tuesday and Thursday
10:00 - 11:30 am
232 Irving II


University of Alaska Fairbanks
Ph.D. Biology

University of Kiel
M.S. Zoology


Curriculum Vitae




Teerlink, S., Horstmann, L. . In r. "Juneau community perceptions toward humpback whales and whale-watching tourism". Tourism in the Marine Environments.

Clark, C., Horstmann, L., Misarti, N.. (2017). "Quantifying variability in stable carbon and nitrogen isotope ratios within the skeletons of marine mammals of the suborder Caniformia". Journal of Archeological Science: Reports. 15:393-400.

Floyd, T.P., Horstmann-Dehn, L., Atkinson, S, Skaugstad, C.. (2017). "Effect of Ichthyophonus on blood chemistry and cortisol concentrations of spawning Yukon River Chinook salmon and their offspring". Diseases of Aquatic Organisms. 122:223-236.

Horstmann-Dehn, L.. (2017). "Gastrointestinal tract of marine mammals". Encyclopedia of Marine Mammals, 3rd edition. Elsevier,

Oxtoby, L.E., L. Horstmann, S.M. Budge, D.M. O’Brien, S.W. Wang, T. Schollmeier, and M.J. Wooller. (2017). "Resource partitioning between Pacific walruses and bearded seals in the Alaska Arctic and sub-Arctic". Oecologia. 184(2):385–398.

Wang, S.W., A.M. Springer, S.M. Budge, L. Horstmann, L.T. Quakenbush, and M.J. Wooller. (2016). "Carbon sources and trophic relationships of ice seals during recent environmental shifts in the Bering Sea." Ecological Applications. 26(3):830–845.

Wright, D.L., Witteveen, B., Wynne, K., Horstmann-Dehn, L.. (2016). "Fine-scale spatial differences in humpback whale diet composition near Kodiak, Alaska". Marine Mammal Science. 32:1099-1114.

Tu, K.L., Blanchard, A.L., Iken, K. Horstmann-Dehn, L. (2015). "Small-scale spatial variability in benthic food webs in the northeastern Chukchi Sea". Marine Ecology Progress Series. 528:19-37.

Wright, D.L., Witteveen, B., Wynne, K., Horstmann-Dehn, L.. (2015). "Evidence of two subaggregations of humpback whales on the Kodiak, Alaska, feeding ground revealed from stable isotope analysis". Marine Mammal Science. 31(4):1378-1400.

Seymour, J., Horstmann-Dehn, L., Rosa, C., Lopez, A.. (2014). "Occurrence and genotypic analysis of Trichinella in Alaskan marine-associated mammals of the Bering and Chukchi seas". Veterinary Parasitology. 200:153-164.

Seymour, J., Horstmann-Dehn, L., Wooller, M.. (2014)." Proportion of higher trophic-level prey in the diet of Pacific walruses (Odobenus rosmarus divergens)". Polar Biology.

Seymour, J., Horstmann-Dehn, L., Wooller, M.. (2014). "Inter-annual variability in the proportional contribution of higher trophic levels to the diet of Pacific walruses". Polar Biology.

S. S. Carroll, L. Horstmann-Dehn and B. L. Norcross. (2013). "Diet history of ice seals using stable isotope ratios in claw growth bands". Canadian Journal of Zoology-Revue Canadienne De Zoologie. 91(4):191-202.

Horstmann-Dehn, L., Follmann, E.H., Rosa, C., Zelensky, G., George, C.. (2012). "Stable carbon and nitrogen isotope ratios in muscle and epidermis of Arctic whales". Marine Mammal Science. 28:E173–E190.

L. Horstmann-Dehn, E. H. Follmann, C. Rosa, G. Zelensky and C. George. (2012). "Stable carbon and nitrogen isotope ratios in muscle and epidermis of arctic whales". Marine Mammal Science. 28(2):E173-E190.

J. C. George, E. Follmann, J. Zeh, S, M. ousa, R. Tarpley, R. Suydamn and L. Horstmann-Dehn. (2011). "A new way to estimate the age of bowhead whales (Balaena mysticetus) using ovarian corpora counts". Canadian Journal of Zoology. 89:840-852.



  • Fisheries Ecology
  • Marine Biology •
  • Marine Mammals


Research Overview

I am interested in broad-scale marine mammal ecology. Feeding ecology in particular is a keystone piece of information to understand adaptation potential of marine mammals and challenges that may arise. Dietary limitations can affect reproductive success, compromise immune function, change exposure to new pathogens (i.e., parasites, contaminants), and can therefore not only limit marine mammal population growth, but also potentially introduce new threats to humans depending on them as a subsistence resource.

I focus my research on Arctic marine mammals, because (1) they are of cultural and nutritional importance to subsistence users, (2) the Arctic is undergoing noticeable change, and (3) planned oil and gas development in this habitat.

I am also working on a fish parasite, Ichthyophonus hoferi, in Chinook salmon, and its potential impact on pre-spawning mortality and fecundity.


Current research projects

  • Evaluation of Chinook Salmon Mortality Factors in Alaska
  • WALRUS–Walrus Adaptability and Long-term Responses
  • Using multi-proxy data to project Sustainability
  • Freshwater growth and survival in AYK Chinook salmon: maternal influences, predation mortality, and the ultimate effects on stock productivity
  • Bowhead whale feeding in the western Beaufort Sea (BOWFEST)