We Were Wrong About How Old Sharks Can Get

Want to see the uncut footage from my dives and baited camera drops before everyone else? Join my Patreon here: http://patreon.com/barnydillarstone 01:42 - How to Age a Fish 04:29 - The Bomb Pulse 07:44 - The 400-Year-Old Shark 11:01 - So, How Old Are They? _____________________________________________ Go check out my field channel @barnydillarstone Follow me on: Instagram - http://instagram.com/barnydillarstone _____________________________________________ RESOURCES: - Nielsen et al. 2016, eye-lens radiocarbon, the source of 392 ± 120 and the 28 sharks: https://doi.org/10.1126/science.aaf1703 and https://ora.ox.ac.uk/objects/uuid:6c040460-9519-4720-9669-9911bdd03b09 - Edwards et al. 2019, the Campana and Nielsen co-authored review, used for the residence-time and independent-verification point: https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2019.00087/full - Campana, Natanson & Myklevoll 2002, porbeagle validated to at least 26 years and the mako result: http://uni.hi.is/scampana/files/2016/01/campana-et-al-2002-porbeagle-cjfas.pdf - Campana 2001, the age-validation review behind the otolith sectioning and false-ring material: http://uni.hi.is/scampana/files/2016/01/campana-2001-1.pdf - Christiansen et al. 2016, the Indian Ocean white shark study, which supports 30–38 years and not 90: http://uni.hi.is/scampana/files/2016/01/christiansen-et-al-2016.pdf - Hamady et al. 2014, the replacement figure of 73 years for a northwest Atlantic male: https://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0084006 - Hansen 1963, Tagging experiments with the Greenland shark, ICNAF Special Publication 4, the 8 cm in 16 years record. Cite it through Edwards 2019 or Nielsen 2016. - Stewart et al. 2006, the beluga tooth layers that doubled the ages, Marine Mammal Science 22(4). Beamish & McFarlane 1983, The forgotten requirement for age validation in fisheries biology, the origin of the validation argument Campana describes. - Grammer et al. 2015, EPSL 424: 59–68, the depth-dependent lag of 5–10 years at 400–500 m and 10–20 years at 800–1,000 m. - Andrews et al., SEDAR 92 RD09, eye-lens carbon coming from metabolic sources rather than dissolved inorganic carbon: https://sedarweb.org/documents/sedar-92-rd09-application-of-the-bomb-radiocarbon-chronometer-with-eye-lens-core-14c-for-age-validation-in-deepwater-reef-fishes