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6 years 45 weeks

Researcher Information


Dr. Heidi Dewar has been enchanted by the ocean and its creatures for as long as she can remember. After receiving her undergraduate degree at Oregon State University in 1987, Heidi attended graduate school at Scripps Institution of Oceanography working with Dr. Jeffry Graham. Her thesis, completed early in 1993, focused on the energetics, swimming mechanics and thermoregulatory capabilities of tropical tunas.

Heidi was subsequently awarded a post-doctoral fellowship at the Monterey Bay Aquarium Research Institute in Monterey, California where she helped develop tools to address more complex physiological questions about fish in their natural environment. Moving next to Stanford University’s Hopkins Marine Station, she worked with Dr. Barbara Block at the Tuna Research and Conservation Center, a joint effort between Stanford and the Monterey Bay Aquarium. She participated in an Atlantic bluefin tuna-tagging program that provided data on the species' movements and behaviors critical to management and conservation, as well as proving an important testing ground for both satellite and archival technologies.

Following her years at Stanford, Heidi returned to Southern California to spend three years working at the Pfleger Institute of Environmental Research, a small non-profit focusing on applied fisheries issues. Here, she helped develop and implement a highly migratory species program focusing on issues ranging from the post-release mortality of billfish caught on recreational fishing gear to the movement of Manta ray in the Komodo Marine Park, in Indonesia.

As a TOPP scientific coordinator, Heidi remains in southern California, based now at the Inter American Tropical Tuna Commissions where she works closely with the TOPP PI’s and support staff. Heidi also collaborates in the tagging of mola mola, swordfish and tuna.

Contact Information:
Inter-American Tropical Tuna Commission
8604 La Jolla Shores Drive
La Jolla, CA 92037, USA
Phone: (760) 757-3581

Website URL
Fisheries Research Biologist
Selected Publications

Block, B.A., Teo, S.L.H., Walli, A. Boustany, A., Stokesbury, M., Farwell, C.J., Weng, K., Dewar, H., and Williams, T. Electronic Tagging and Population Structure of Atlantic Bluefin Tuna. Nature. In press.

Dewar H., Domeier M.L., and Nasby-Lucas N., 2004. Insights into young of the year white shark (Carcharodon Carcharias) behavior in the Southern Californian Bight. Environmental Biology of Fishes. 70, 133-143.

Domeier ML, Dewar H, Nasby-Lucas N. 2003. Mortality rate of striped marlin (Tetrapturus audax) caught with recreational tackle. MARINE AND FRESHWATER RESEARCH 54 (4), 435-445.

Block, B.A., Dewar, H., Blackwell, S., Williams, T., Prince E.D., Farwell, C., Boustany, A., Seitz, A., Teo, L. and Fudge, D. (2001) Electronic tags reveal migratory movements, depth preferences and thermal biology of Atlantic bluefin tuna. Science 293, 1310-1314.

Korsmeyer, K.E. and Dewar, H. (2001) Tuna Metabolism and Energetics. In Fish Physiology. eds B. Block and D. Stevens. pp 35-78.

Arnold, G. and Dewar H. Electronic Tags in Marine Fisheries Research: A 30-Year Perspective. In Methods and Technologies in Fish Biology and Fisheries, Vol 1.eds J. Sibert and J. Nielsen Kluwer Academic Press, Dordrecht, The Netherlands. pp 7-64.

Dewar, H., Deffenbaugh, M., Thurmond, G., Lashkari K.G., and Block, B. Development of an Acoustic Telemetry Tag for Monitoring Electromyograms in Free-Swimming Fish. J. exp. Biol. 202, 2693-2699.

Block, B.A., Dewar, H., Farwell, C.F. and Prince, E.D. (1999) Novel Satellite Technology for Tracking the Movements of Atlantic Bluefin Tuna. Proc. Nat. Acad. of Sci. 95, 9384-9389.

Block, B.A., Dewar, H.., Williams, T., Prince E.D., Farwell, C. and Fudge, D. (1998) Archival Tagging of Atlantic Bluefin Tuna (Thunnus thynnus thynnus). Mar. Tech. Soc. J. 32(1) 37-46.

Block, B.A., Keen, J.E., Castillo, B., Brill, R.W., Dewar, H., Freund, E.V., Marcinek, D.J. and Farwell, C. Environmental Preferences of Yellowfin Tuna (Thunnus albacares) at the Northern Extent of their Range. Mar. Biol. 130, 119-132.

Dewar, H. and Graham, J.B. (1994). Studies of tropical tuna swimming performance in a large water tunnel I. Energetics. J. exp. Biol. 192, 13-31.

Dewar, H., Graham, J.B. and Brill, R.W. (1994). Studies of tropical tuna swimming performance in a large water tunnel II. Thermoregulation. J. exp. Biol. 192, 33-44.

Dewar, H. and Graham, J.B. (1994). Studies of tropical tuna swimming performance in a large water tunnel III. Swimming Kinematics. J. exp. Biol. 192, 45-59.

National Oceanographic and Atmospheric Administration, Fisheries Resources Division