Evaluation of ageing accuracy of bocaccio ( Sebastes paucispinis) rockfish using bomb radiocarbon

The accuracy of bocaccio rockfish age assignments was evaluated using radiocarbon levels measured in otoliths collected from fish taken off the coast of Washington state (USA). Otoliths from 24 randomly selected fish with estimated birth years from 1950 to 1977, based on paired otolith age estimates...

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Bibliographic Details
Published in:Fisheries research 2006-02, Vol.77 (2), p.200-206
Main Authors: Piner, Kevin R., Wallace, John R., Hamel, Owen S., Mikus, Robert
Format: Article
Language:English
Subjects:
Ageing
Agnatha. Pisces
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
Bocaccio
Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.)
Fundamental and applied biological sciences. Psychology
Marine
Otolith
Radiocarbon
Rockfish
Sebastes paucispinis
Validation
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
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Summary:The accuracy of bocaccio rockfish age assignments was evaluated using radiocarbon levels measured in otoliths collected from fish taken off the coast of Washington state (USA). Otoliths from 24 randomly selected fish with estimated birth years from 1950 to 1977, based on paired otolith age estimates, were used in this study. The level of radiocarbon measured in the core of each otolith was compared to a reference radiocarbon chronology based on radiocarbon levels in otoliths from known-age Pacific halibut. The degree of graphical phase correspondence between the two series was sufficient to support the hypothesis that the annuli were formed yearly in bocaccio otoliths but were somewhat difficult to identify. Statistical analysis of the ageing errors could not document a bias in production ageing of bocaccio. Pre-bomb radiocarbon levels measured in otolith cores confirm that bocaccio can live at least 37 years.
ISSN:0165-7836
1872-6763
DOI:10.1016/j.fishres.2005.10.003