Radiocarbon in otoliths of yelloweye rockfish (Sebastes ruberrimus) [electronic resource] : a reference time series for the coastal waters of southeast Alaska
- Washington, D.C. : United States. Dept. of Energy, 2003. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- PDF-file: 30 pages; size: 0.2 Mbytes
- Additional Creators:
- Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Atmospheric testing of thermonuclear devices during the 1950s and 1960s created a global radiocarbon (¹⁴C) signal in the environment that has provided a useful tracer and chronological marker in oceanic systems and organisms. The bomb-generated ¹⁴C signal retained in fish otoliths can be used as a permanent, time-specific recorder of the 14C present in ambient seawater, making it a useful tool in age validation of fishes. The goal of this study was to determine ¹⁴C levels in otoliths of the age-validated yelloweye rockfish (Sebastes ruberrimus) to establish a reference time series for the coastal waters of southeast Alaska. Radiocarbon values from the first year's growth of 43 yelloweye rockfish otoliths were plotted against estimated birth year to produce a 14C time series for these waters spanning 1940 to 1990. The time series shows the initial rise of bomb 14C occurred in 1958 in coastal southeast Alaskan waters and ¹⁴C levels rose relatively rapidly to peak Δ¹⁴C values (60-70%) between 1966 and 1971, with a subsequent declining trend through the end of the record in 1990 (-3.2%). In addition, the radiocarbon data, independent of the radiometric study, confirms the longevity of the yelloweye rockfish up to a minimum of 44 years and strongly supports higher age estimates. The yelloweye rockfish record provides a ¹⁴C chronology that will be useful for the interpretation of ¹⁴C accreted in biological samples from these waters and in future rockfish age validation studies.
- Published through SciTech Connect., 10/14/2003., "ucrl-jrnl-200275", Published in: Canadian Journal of Fisheries and Aquatic Sciences, vol. 61, N/A, March 1, 2004, pp. 443-451 61 ISSN 0706-652X; CJFSDX FT, and Brown, T A; Andrews, A H; Frantz, B R; Cailliet, G M; Coale, K H; Kerr-Ferrey, L A.
- Funding Information:
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