Jen Maresh


Ph.D. University of California, Santa Cruz
M.E.M. Duke University
B.S. West Chester University of Pennsylvania




Research Interests: Animal Bioenergetics

My background is with swim behaviors and mechanics as they relate to foraging in marine mammals, and my research has included work with wild bottlenose dolphins, North Atlantic right whales, Weddell seals and northern elephant seals. Currently my interests lean more towards animal bioenergetics, which is an understanding of how energy flows through living systems from ingestion of prey up through the building of an animal and its offspring. I am interested in the decisions animals make while foraging, and the energetic costs and pay-offs of those decisions under both natural and ‘disturbed’ conditions, as a way of understanding how resilient they might be to a rapidly changing environment.


Williams, T.M. & J.L. Maresh. (2016) Exercise energetics in Marine Mammal Physiology: Requisites for Ocean Living (Castellini & Mellish, eds.). SPi Global: Madison, WI. Pp. 47-68.

Maresh, J.L., T. Adachi, A. Takahashi, et al. (2015) Summing the strokes: energy economy in northern elephant seals during large-scale foraging migrations. Movement Ecology 3(22): doi:10.1186/s40462-015-0049-2.

Schwarz, L.K., S. Villegas-Amtmann,…J.L. Maresh, et al.(2015) Comparisons and uncertainty in fat and adipose tissue estimation techniques: the northern elephant seal as a case study. PLoS ONE10(6): e0131877.

Maresh, J.L., S.E. Simmons, B.I. McDonald, et al. (2014) Free-swimming northern elephant seals have low metabolic rates that are sensitive to an increased cost of transport. Journal of Experimental Biology 217(9): 1485-1495.

Adachi, T., J.L. Maresh, P.W. Robinson, et al. (2014). The foraging benefits of being fat in a highly migratory marine mammal. Proceedings of the Royal Society B: Biological Sciences 281(1797):20142120.

Maresh, J.L. (2014) Bioenergetics of marine mammals: the influence of body size, reproductive status, locomotion and phylogeny on metabolism. Ph.D. Thesis, University of California, Santa Cruz.

Costa, D.P., L.K. Schwarz, J. Maresh, et al. (2013) A bioenergetics approach to understanding the population consequences of natural and anthropogenic disturbance. Integrative and Comparative Biology 53: E41. Oxford Univ Press: Cary, NC.

Robinson, P.W., D.P. Costa,…J.L. Maresh, et al. (2012) Foraging behavior and success of a mesopelagic predator in the northeast Pacific Ocean: insights from a data-rich species, the northern elephant seal. PLoS ONE7(5): e36728.

Maresh, J.L., F.E. Fish, D.P. Nowacek et al. (2004) High performance turning capabilities during foraging by bottlenose dolphins (Tursiops truncatus). Marine Mammal Science 20(3): 498-509.

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