Age and growth of the pacific grenadier (Coryphaenoides acrolepis) with age estimate validation using an improved radiometric ageing technique

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Andrews, A. H., Cailliet, G. M., & Coale, K. H. (1999). Age and growth of the pacific grenadier (Coryphaenoides acrolepis) with age estimate validation using an improved radiometric ageing technique. Canadian Journal of Fisheries and Aquatic Sciences, 56(8), 1339-1350.
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TitleAge and growth of the pacific grenadier (Coryphaenoides acrolepis) with age estimate validation using an improved radiometric ageing technique
AuthorsA. Andrews, G. Cailliet, K. Coale
AbstractCurrent and historic longevity estimates for the Pacific grenadier (Coryphaenoides acrolepis) range from 6 to greater than 60 years. Age estimates in this study using growth increment counts in thin otolith sections indicate the Pacific grenadier is a long-lived fish. To validate this growth information, age was determined using the radioactive disequilibria of 210Pb and 226Ra in otolith cores from adult Pacific grenadier. Radiometric ages closely agreed with age estimates from counting growth increments, which confirms their annual periodicity. Radiometric results indicate the Pacific grenadier can live at least 55.8 years (-7.4, +10.1 years). Growth increment counts from large fish indicate longevity may approach 73 years. Because the Pacific grenadier is long-lived and matures late in life, it may be vulnerable to heavy fishing pressure. Therefore, conservation measures need to be taken to sustain this rapidly developing fishery.
JournalCanadian Journal of Fisheries and Aquatic Sciences
Date1999
Volume56
Issue8
Start page1339
End page1350
ISSN0706-652X
Subjectsage determination, growth, otolith, radiometric method, Coryphaenoides acrolepis
NoteCited By (since 1996):39, Fish and Fisheries, CODEN: CJFSD

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