Jason Hassrick, Ph.D.
Managing Director, Biology
PhD, Ecology and Evolutionary Biology, University of California, Santa Cruz, 2011
MSc, Biology, Sonoma State University, 2004
BA, Environmental Studies, University of California, Santa Cruz, 1998
Jason Hassrick is an ecologist who conducts applied research for water resource management in rivers and estuaries of the West Coast, and in the California Current. He is particularly interested in how understanding life histories of species can inform management actions. Jason studies how animals move through their habitat using various forms of animal telemetry and he uses trawling techniques to investigate how organisms at various life stages are distributed in the environment. He has also worked as a federal agency scientist for the Bureau of Reclamation on Delta Smelt during a prolonged drought, for NOAA Fisheries on outmigration survival of winter run Chinook salmon, and for non-profit and university research groups on climate adaptation and animal movement studies in the North Pacific, East Africa, and South America.
Selected Publications & Projects
Hayes, S.A., Ammann, A, Harding, J. A., Hassrick, J. L., deWitt, L., and Morgan, C. A. (2017). Steelhead observations in the California Current lead to a marine-based hypothesis for the ‘half-pounder’ life history, with climate change implications for anadromy. NPAFC Bull 6: 97-105. doi:10.23849/npafcb6/97.105
Hassrick, J.L., M.J. Henderson, D.D. Huff, W.J. Sydeman, J. Harding, A.J. Ammann, E.D. Crandall, E. Bjorkstedt, J.C. Garza, and S.A. Hayes (2016). Early ocean distribution of juvenile Chinook salmon in an upwelling ecosystem Fisheries Oceanography. 25: 133–146. doi:10.1111/fog.12141
Wilder, R.M., Hassrick, J.L., Grimaldo, L.F., Greenwood, M.F.D., Acuña, S., Burns, J.M., Maniscalco, D.M., Crain, P.K., and Hung, T. (2016). Feasibility of PIT and acoustic tagging for endangered adult Delta Smelt. North American Journal of Fisheries Management. 36(5): 1167-1177. doi:10.1080/02755947.2016.1198287
Maxwell S.M., E.L. Hazen, S.J. Bograd, B.S. Halpern, G.A. Breed, B. Nickel, N.M Teutschel, L.B. Crowder, S. Benson, P.H. Dutton, H. Bailey, M.A. Kappes, C.E. Kuhn, M.J. Weise, B.R. Mate, S.A. Shaffer, J.L. Hassrick, R.W. Henry, L. Irvine, B.I. McDonald, P.W. Robinson, B.A. Block, and D.P. Costa (2013). Cumulative human impacts on marine predators. Nature communications 4:2688. DOI: 10.1038/ncomms3688
Hassrick, J.L., D.E. Crocker, and D.P. Costa (2013). Effects of maternal age and mass on foraging behavior and foraging success in the northern elephant seal. Functional Ecology. 20, 889–899. doi: 10.1111/1365-2435.12108