Oregon State University
Oct. 2019- present

Assistant Professor

I study the behavior and physiology of marine predators using cutting-edge bio-logging techniques. I design and deploy novel marine biologging tags to understand the foundations of animal movements and quantify the kinematics of dynamic movements. I am also interested in the roles elasmobranch predators play in the energetic budgets of coastal ecosystems.

Research Overview
  • AAUS certified Scientific Diver

  • NAUI certified Master Diver, Rescue Diver, Nitrox Diver, O2 Provider

  • Captain’s License- Master 50-ton Inland and Uninspected Near Coastal

Hopkins Marine Station, Stanford University
2015- 2019

Research Scientist

I studied the movement and behaviors of large marine predators. I used cutting edge technologies (i.e., Saildrones, Wavegilders, camera tags, etc.) to describe the trophic and ecological interactions of top predators at remote atoll communities and pelagic habitats and I developed new techniques with these technologies for protection, monitoring, enforcement and management of remote marine protected areas.

Hopkins Marine Station, Stanford University
2011- 2014

​Post-doctoral Researcher

I developed novel quantitative methods to assess population abundance of marine species to inform conservation strategies. Studied the physiology, population abundance and status, behavior, and movement of three species of warm-bodied lamnid sharks (Carcharodon carcharias, Isurus oxyrhincus and Lamna ditropis) using unique approaches with electronic and natural tagging techniques. Developed innovative tools to affect the intersection of science, education and the public.

Computer Languages







Max Planck Institute for Ornithology
Jan. 2010-Dec 2011

​Post-doctoral Researcher


Designed and developed a novel external tag that creates an artificial ambient magnetic field around fish in their natural environment and in controlled conditions to determine how sharks navigate during migrations using earth’s magnetic field and local foraging events using small-scale magnetic anomalies.


Determined energetic costs of migration, breeding and overwinter survival in free-living songbirds. Energetic expenditure is measured via heart-rate telemeters and behavior via continuous active tracking and focal sampling.

University of California, Davis


Developed methods to quantitatively assess data-poor marine species. Led a research team off northern California to determine life history, physiology, genetics, migration and an abundance estimate of white sharks, Carcharodon carcharias. Conducted the first quantitative assessment of thresher sharks (Alopias vulpinus) off California.


Commercial Shark Fisheries Observer Program
Oct. 2003 - July 2004         

Research Scientist


Conducted fishery independent research cruises to collect shark specimens used for stock assessment and conservation recommendations. Performed life history analyses including histological and physiological reproductive analyses and age-growth relationships.


NMFS Shark Population Assessment Group
Sept. - Nov.  2003

Shark Population Assessment Researcher


Analyzed diet composition from the Atlantic Sharpnose, Rhizoprionodon terraenovae, and Scalloped Hammerhead, Sphyrna lewini, to develop a model of early age and growth and feeding behavior. Conducted mark-recapture study on Bonnethead shark, Sphyrna tiburo. Analyzed shark vertebrae to gauge the relationship between age and growth for studies contributing to stock assessments.


Commercial Shark Fisheries Observer Program
July - Sept. 2003        

Commercial Shark Fisheries Researcher


Collected data for on-going studies affecting the conservation and management of shark populations.


Manomet Center for Conservation Sciences
April - July 2003                 

Bycatch Research Specialist


Designed, manufactured and tested experimental fishing gear based on animal behavior in order to conserve and protect incidentally caught species.


Boston University Aquatic Conservation Lab
May - Aug. 2001

Head Research Technician


Analyzed behavioral and morphological differences between wild and aquaculture raised Tautog, Tautoga onitis.  Conducted freshwater conservation research on interactions between fish species of Lake Victoria, Africa.


Manomet Center for Conservation Sciences
May 1999 - June 2000

Bycatch Research Specialist


Performed hands-on collection of bycatch data from commercial fishing vessels at sea.  Analyzed data and presented possible implications on the fisheries from experimentally designed nets and made recommendations for conservation strategies to limit bycatch. 



B.A. Boston University
May 2001
Biology with marine science concentration


Distinction Thesis Title: Potential effects of capturing schooling and non-schooling prey on patterns of energy allocation and growth of the Nile perch, Lates niloticus


Ph.D. University of California, Davis
December 2009


Dissertation Title: Methods for assessment of data-poor shark species

B.A. Boston University
May 2001
Biology with marine science concentration


Distinction Thesis Title: Potential effects of capturing schooling and non-schooling prey on patterns of energy allocation and growth of the Nile perch, Lates niloticus


Ph.D. University of California, Davis
December 2009


Dissertation Title: Methods for assessment of data-poor shark species

B.A. Boston University
May 2001
Biology with marine science concentration


Distinction Thesis Title: Potential effects of capturing schooling and non-schooling prey on patterns of energy allocation and growth of the Nile perch, Lates niloticus


Ph.D. University of California, Davis
December 2009


Dissertation Title: Methods for assessment of data-poor shark species


2019.Carlisle A.B., Tickler, D., Dale, J.J., Ferretti, F., Curnick, D.J., Chapple, T.K., Schallert, R., Castleton, M. & Block, B. A. Estimating space use of mobile fishes in a large marine protected area with methodological considerations in acoustic array design. Frontiers in Marine Science


2019. Quieroz, N.,.... et al. Global spatial risk assessment of sharks under the footprint of fisheries. Nature


2019 Andrzejaczek S., Gleiss A.C., Lear K.O. , Pattiaratchi, C.B., Chapple, T.K., & Meekan, M.G. Biologging Tags Reveal Links Between Fine-Scale Horizontal and Vertical Movement Behaviors in Tiger Sharks (Galeocerdo cuvier). Frontiers in Marine Science.


2019 Jewell, O.J.D., Gleiss, A.C., Jorgensen, S.J., Andrzejaczek, S., Moxley, J.H., Beatty, S.J., Wikelski, M., Block., B.A., & Chapple, T.K. Cryptic habitat use of white sharks in kelp forest revealed by animal-borne video. Biology Letters.


2019 Jorgensen, S.J., Anderson, S.D., Ferretti, F.,Tietz, J., Chapple, T.K., Kanive, P.E., & Block, B.A. Killer whales displace white sharks on foraging grounds. Scientific Reports.


2019 Kanive, P.E., Rotella, J.J., Jorgensen, S.J., Chapple, T.K., Hines, J.E., Anderson, S.D. & Block, B.A. Size-specific apparent survival rate estimates of white sharks using mark- recapture models. Canadian Journal of Fisheries and Aquatic Sciences.

2019 Tickler, D., Carlisle, A.B., Chapple, T.K., Curnick, D.J., Dale, J.J., Schallert, R. & Block, B.B. Potential detection of illegal fishing by passive acoustic telemetry. Animal Biotelemetry.

2018 Huveneers, C., Apps, K., Becerril-García, E.E., Bruce, B., Butcher, P.A., Carlisle, A.B., Chapple, T.K., ... & Werry, J. Future Research Directions on the “Elusive” White Shark. Frontiers in Marine Science.

2016 Chapple, T. K., Chambert, T., Kanive, P. E., Jorgensen, S. J., Anderson, S. D., Carlisle, A. B., Rotella, J. J., & Block, B. A. A novel application of multi-event modeling to efficiently estimate segregation among sex and age classes of a highly migratory pelagic vertebrate. Ecology.

2015    Jorgensen, S. J., Gleiss, A. C., Kanive, P. E., Chapple, T. K., Anderson, S. D., Ezcurra, J. M., Brandt W. T. & Block, B. A. In the Belly of the Beast: Resolving Stomach Tag Data to Link Temperature, Acceleration and Feeding in White Sharks (Carcharodon carcharias). Animal Biotelemetry


2015    Feretti, F., Jorgensen, S. J., Chapple, T. K., De Leo, G. & Micheli, F. Reconciling predator conservation with public safety. Frontiers in Ecology and the Environment


2015    Chapple, T. K., Gleiss, A. C., Jewell, O. J. D., Wikelski, M. & Block, B. A. Tracking Sharks Without Teeth: A Non-Invasive Rigid Tag Attachment for Large Predatory Sharks. Animal Biotelemetry


2013    Chapple, T. K. & Botsford, L. W. A comparison of linear demographic models and the fraction of lifetime egg production (FLEP) for assessing sustainability in sharks. Conservation Biology


2012    Jorgensen, S. J. Arnoldi, N. S., Estess, E. E., Chapple, T. K., Rückert,, M, Anderson, S. D. & Block, B. A. Eating or Meeting? Cluster Analysis Reveals Intricacies of White Shark (Carcharodon carcharias) Migration and Offshore Behavior. PLoSONE


2012    Carlisle A.B., Kim S.L., Semmens B.X., Madigan D.J., Perle C.R., Jorgensen S.J., Anderson, S.A., Chapple, T.K., Kanive, P.E. & Block B.A. Using stable isotope analysis to understand migration and trophic ecology of eastern North Pacific white sharks (Carcharodon carcharias). PLoSONE


2012    Jorgensen, S. J., Chapple, T. K., Anderson, S. A., Hoyos, M., Reeb, C., & Block, B. A. Connectivity among White Sharks Coastal Aggregation Areas in the Northeastern Pacific. Global Perspectives on the Biology and Life History of the Great White Shark


2011    Chapple, T. K., Jorgensen, S. J., Anderson, S. A., Kanive, P. E., Klimley, A. P., & Block, B. A. A first estimate of white shark, Carcharodon carcharias, abundance off central California using photo-identity marking. Biology Letters


2011    Anderson, S. A., Chapple, T. K., Jorgensen, S, J, Klimley, A. P., & Block, B. A. Validation of Long-term Individual Identification and Site Fidelity of Great White Sharks, Carcharodon carcharias, Off California Using Dorsal Fins. Marine Biology


2009    Jorgensen, S. J., Reeb, C. A., Chapple, T. K., Anderson, S., Perle, C., Van Sommeran, S. R., Fritz-Cope, C., Brown, A. C., Klimley, A. P., & Block, B. A. Philopatry and migration of Pacific white sharks. Proceedings of the Royal Society B: Biological Sciences.

Seymour Science Center, Nov. 2015  Santa Cruz, CA

True Predators: A real Understanding of White Sharks off California


Eastern Michigan University, Feb 2015 Ypsilanti, MI

California’s White Sharks: New Methods to Study Ancient Predators


California Surf Rider Foundation, April 2013 Monterey, CA

True Locals: The Behavior and Biology of White Sharks     


Humboldt State University, April 2013 Humboldt, CA

California White Sharks (Carcharodon carcharias): Creatures of Amazing Complexity


Año Nuevo State Park, July 2012, 2013, 2014, 2015 Davenport, CA

California White Sharks (Carcharodon carcharias): Creatures of Amazing Complexity


Montana State University, March 2012 Bozeman, MT

White Sharks of the Blue Serengeti


Max Planck Institute, Dec, 2011 Möggingen, Germany

Haifische der Welt; Biologie, Physiologie und Verhalten


Grand Teton National Park, March 2010 Moose, WY

Migratory routes, behavior and population abundance of white sharks (Carcharodon carcharias) in the northeast Pacific


International White Shark Symposium, Feb. 2010 Honolulu, HI

A first estimate of white shark, Carcharodon carcharias, abundance off central California using photo-identity marking


American Elasmobranch Society, July 2009 Portland, OR

A mark-recapture population estimate of white sharks, Carcharodon carcharias, off California


Society for Integrative and Comparative Biology, Jan. 2009 Boston, MA

A comparison of differential spatial and temporal use by male and female migrating Great White Sharks, Carcharodon carcharias, in the eastern Pacific


American Elasmobranch Society, July 2008 Montreal, Canada

A validation for the use of fin photographs for individual identification and a comparison of two analysis frameworks for the white shark, Carcharodon carcharias.


Point Reyes National Seashore, Nov. 2007 Point Reyes, CA

White shark (Carcharodon carcharias) research and their population off northern California.


American Elasmobranch Society, July 2007 St. Louis, MO

Determination of the effects of fishing on the status of the common thresher shark, Alopias vulpinus, off the coast of California


American Elasmobranch Society, July 2004 Norman, OK           

At-vessel mortality of large and small coastal sharks in the U.S. Atlantic shark bottom longline fishery

Popular Media


KCBS Radio

KALWAre white sharks doing something different this year? Or are we?



National GeographicGreat White Ambush

CBS This Morning



Discover Magazine Struggling to Save Sharks From Extinction’



Discovery ChannelGreat White Highway’

The Today Show

SÜDKURIER  ‘Der Hai ist kein Monster’



Associated PressCalifornia study finds low number of great white sharks’

National Public RadioSurvey Shows Fewer Great White Sharks in State Waters Than Expected’

San Francisco Chronicle ‘Fewer great white sharks found than expected’

Yahoo! NewsShort Shark Supply: Great White Population Low, Census Finds’

Christian Science MonitorGreat white shark population lower than previously believed’

MSNBC  Great white sharks swimming to extinction?’

Fox News ‘Census Finds Just 219 Great White Sharks Off California Coast’

Discovery News ‘Calif. Great White Shark Count Down to 219

ABC Shark population off coast surprisingly low

Also covered in Forbes, United Press International, Kansas City Star, The Columbian,Star Tribune, The Telegram, Seattle Times, Outdoors, action and adventure, PoliJAM Times, SeaGrant California , Davis Enterprise, Monterey Herald, Mercury News, e! Science News, The Daily Journal, Marin Independent Journal, Central Valley Business Times, All Headline News, The Bay Citizen, Cleveland Plain Dealer as well as other internet locations.



Bay Nature ‘Beyond Jaws: Fathoming the Ways of the White Shark’



Point Reyes Light ‘Great white sharks move predictably, mate mysteriously’



Point Reyes National Seashore Podcast: White sharks of the Northern Pacific’

Film ‘White Shark Café’



Point Reyes National Seashore In search of the Great White Shark’


2013                   National Geographic Society, Expedition Council Grant


2010                   National Geographic Society, Waitt Grant


2008-2009         Sea Grant-National Marine Fisheries Service Population Dynamics



2008                   Point Reyes National Seashore- Pacific Coast Science and Learning              

                            Center Research Award


2008                   American Elasmobranch Society Grant



2004,’05,’06      Partnership for Education in Marine Resource and Ecosystem Management


2004                   National Science Foundation Graduate Research Fellowship