In:
Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 61, No. 3 ( 2004-03-01), p. 443-451
Abstract:
Atmospheric testing of thermonuclear devices during the 1950s and 1960s created a global radiocarbon ( 14 C) signal that has provided a useful tracer and chronological marker in oceanic systems and organisms. The bomb-generated 14 C signal retained in fish otoliths can be used as a time-specific recorder of the 14 C present in ambient seawater, making it a useful tool in age validation of fishes. The goal of this study was to determine 14 C 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 plotted against estimated birth year produced a 14 C time series (19401990) for these waters. The initial rise of 14 C occurred in 1958 and 14 C levels rose to peak values (6070) between 1966 and 1971, with a subsequent declining trend through the end of the record in 1990 (3.2). In addition, the 14 C data confirmed the longevity of the yelloweye rockfish to a minimum of 44 years and strongly support higher age estimates. This 14 C time series will be useful for the interpretation of 14 C accreted in biological samples from these waters.
Type of Medium:
Online Resource
ISSN:
0706-652X
,
1205-7533
Language:
English
Publisher:
Canadian Science Publishing
Publication Date:
2004
detail.hit.zdb_id:
7966-2
detail.hit.zdb_id:
1473089-3
SSG:
21,3
SSG:
12
