Age validation of yellowfin (Thunnus albacares) and bigeye (Thunnus obesus) tuna of the northwestern Atlantic Ocean

Andrews, Allen H.; Pacicco, Ashley; Allman, Robert; Falterman, Brett J.; Lang, Erik T.; Golet, Walter

doi:10.1139/cjfas-2019-0328

i

Age validation of yellowfin (Thunnus albacares) and bigeye (Thunnus obesus) tuna of the northwestern Atlantic Ocean

2020
By Andrews, Allen H. ; Pacicco, Ashley ; Allman, Robert ; Falterman, Brett J. ; Lang, Erik T. ; Golet, Walter
Source: Canadian Journal of Fisheries and Aquatic Sciences, 77(4), 637-643

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Journal Title:

Canadian Journal of Fisheries and Aquatic Sciences
Personal Author:

Andrews, Allen H. ; Pacicco, Ashley ; Allman, Robert ; Falterman, Brett J. ; Lang, Erik T. ; Golet, Walter
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; CoRIS (Coral Reef Information System) ; SEFSC (Southeast Fisheries Science Center)
Description:

Estimates of age and growth of yellowfin (Thunnus albacares) and bigeye (Thunnus obesus) tuna remain problematic because validation of growth zone deposition (opaque and translucent) has not been properly evaluated. Otolith growth structure (zone clarity) can be poorly defined for tropical tunas, but the use of bomb radiocarbon dating has validated age estimates to 16–18 years for yellowfin and bigeye tuna. Use of the radiocarbon decline period — defined by regional coral and otoliths — provided valid ages through ontogeny. Yellowfin tuna aged 2–18 years (n = 34, 1029–1810 mm FL) and bigeye tuna aged 3–17 years (n = 12, 1280–1750 mm FL) led to birth years that were coincident with the bomb radiocarbon decline. The results indicate there was no age reading bias for yellowfin tuna and that age estimates of previous studies were likely underestimated for both species.
Source:

Canadian Journal of Fisheries and Aquatic Sciences, 77(4), 637-643
DOI:

https://doi.org/10.1139/cjfas-2019-0328
ISSN:

0706-652X ; 1205-7533
Format:

pdf
Publisher:

Canadian Science Publishing
Document Type:

Journal Article
Funding:

Grant no. NA17NMF4540140
Rights Information:

Other
Compliance:

Library
Download URL:

https://repository.library.noaa.gov/view/noaa/67730/noaa_67730_DS1.pdf
File Type:

[PDF - 1.33 MB]
Collection(s):

National Marine Fisheries Service (NMFS) ; Coral Reef Conservation Program (CRCP)
Main Document Checksum:

urn:sha-512:d2c3b6c9a57842d5cf408b40a279e40608f2f025901a7e7ddb59c2d846b3e265674b70b7093cee0eb3d73a3f1e8f913517696b03685a5c3b19c57d01d7cac819

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