Open to the Public

David McGuire riding on a sea-going vessle, wearing an orange coat and black beanie--looks cold and grey, but he looks absolutely happy
David McGuire, Director of the non-profit Shark Stewards & Research Associate at the California Academy of Sciences.

Does size matter in truly protecting large species such as sea-turtles, whales, and sharks? 

Size Matters: Do Marine Protected Areas Protect Marine Megafauna?

Speaker:  David McGuire, Director of Shark Stewards, and Research Associate for the California Academy of Sciences

Thursday, September 21, 2023

6:00pm to 7:00pm Pacific Time

via Zoom (details below)


About the Topic

Marine protected areas (MPAs) are intended to conserve critical marine habitat, localized flora and fauna, and large species such as sea-turtles, whales, and sharks. However, most MPAs, like the California Network of Marine Protected Areas, are relatively small and do not encompass the area to protect highly migratory species from fisheries.

However, in recent years large MPAs are being added to meet UN Sustainable Development Goals, some covering more than 1 million square kilometers, yet some scientists are questioning how well these areas safeguard ocean megafauna with large geographic ranges.

About the Speaker

David is the Founder and Director of the shark and marine conservation nonprofit “Shark Stewards”. A marine biologist, David is a research associate at the California Academy of Sciences where he conducts shark studies and media production from California to China. Shark Stewards introduced the first North American shark fin trade ban in California and led several states and international movements limiting the overfishing of sharks and the shark fin trade. Shark Stewards actively partners with NOAA in our National Marine Sanctuaries and the Ocean Protection Council in our California marine protected areas, where he is Co-chair of a California MPA collaborative committee. Shark Stewards is also helping study, establish and monitor new dive tourism and community supported marine protected areas in Mexico and Indoensia.

A documentary filmmaker, David received an Emmy for Field Production and Camera on the documentary “Reefs to Rainforests” on the Biodiversity Expedition in the Philippines with the California Academy of Sciences, and has numerous awards for his conservation documentaries. Since 2007 he has been involved with the International Ocean Film Festival as a contributor, screener, and programmer, and hosts the popular shark program. He is a National Geographic Explorer with an adventure column and has written and contributed to numerous publications and books, including publishing a new shark science book for youth: Sharks for Kids. He is a popular public speaker on sharks and the ocean, is a lecturer at the University of California, Berkeley and adjunct professor at the University of San Francisco.

Suggested Reading

Zoom Link

Password: NoPlanetB

Meeting ID: 934 1666 0930

Or iPhone one-tap :

    US: +16694449171„93416660930#  or +16699006833„93416660930#

Or Telephone:

    Dial(for higher quality, dial a number based on your current location):

        US: +1 669 444 9171  or +1 669 900 6833  or +1 346 248 7799  or +1 719 359 4580  or +1 253 205 0468  or +1 253 215 8782  or +1 305 224 1968  or +1 309 205 3325  or +1 312 626 6799  or +1 360 209 5623  or +1 386 347 5053  or +1 507 473 4847  or +1 564 217 2000  or +1 646 876 9923  or +1 646 931 3860  or +1 689 278 1000  or +1 301 715 8592

    Meeting ID: 934 1666 0930

    Phone Password: 955312037 (no participant id, press # to bypass)

    International numbers available:


The Center for the Blue Economy is a research organization at the Middlebury Institute of International Studies.  Our mission is to promote a sustainable ocean and coastal economy (the “Blue Economy”) through leadership in research, analysis, and education.  For questions contact: Rachel C. at or visit or call 831-647-4183 (must leave message and receive call back).


Email Notice Reminders?

If you wish to receive email reminders one day prior to the talks (as well as 15 minutes ahead of each event), contact with that request and we will “make it so.”