Application of bomb radiocarbon chronologies to shortfin mako (Isurus oxyrinchus) age validation

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Ardizzone, D., Cailliet, G. M., Natanson, L. J., Andrews, A. H., Kerr, L. A., & Brown, T. A. (2006). Application of bomb radiocarbon chronologies to shortfin mako (Isurus oxyrinchus) age validation. Environmental Biology of Fishes, 77(3), 355-366. doi:10.1007/s10641-006-9106-4
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TitleApplication of bomb radiocarbon chronologies to shortfin mako (Isurus oxyrinchus) age validation
AuthorsD. Ardizzone, G. Cailliet, L. Natanson, A. Andrews, L. Kerr, T. Brown
AbstractAge estimation is an issue for the shortfin mako, Isurus oxyrinchus, because of disagreement on vertebral band-pair deposition periodicity. In the 1950s-1960s, thermonuclear testing released large amounts of radiocarbon into the atmosphere, which diffused into the ocean through gas exchange. This influx created a time-specific marker that can be used in age validation. Annual band-pair deposition in the porbeagle, Lamna nasus, was validated in a previous study and indicated preliminary annual deposition in the shortfin mako, using four samples from one vertebra. In the present study, age estimates from 54 shortfin mako vertebrae collected in 1950-1984 ranged 1-31 years. Ageing error between readers was consistent, with 76% of the estimates ranging within 2 years. Twenty-one Δ14C values from eight shortfin mako vertebrae (collected in the western North Atlantic in 1963-1984) ranged -154.8‰ to 86.8‰. The resulting conformity with the Δ14C timeline for the porbeagle supported annual band-pair deposition in vertebrae of the shortfin mako. © 2006 Springer Science+Business Media, Inc.
JournalEnvironmental Biology of Fishes
Date2006
Volume77
Issue3-4
Start page355
End page366
ISSN0378-1909
Subjectsage determination, bone, growth determination, growth rate, periodicity, radiocarbon dating, shark, Atlantic Ocean, Atlantic Ocean (Northwest), Chondrichthyes, Isurus, Isurus oxyrinchus, Lamna nasus, Lamnidae
NoteCited By (since 1996):19, Fish and Fisheries, CODEN: EBFID

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