Radiometric age confirmation and growth of a deep-water marine fish species: The bank rockfish, Sebastes rufus

Watters, Diana L.; Kline, D.; Coale, Kenneth H.; Cailliet, Gregor M.

doi:10.1016/j.fishres.2006.06.019

Cited by 7 publications

(4 citation statements)

References 27 publications

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“…A number of studies (Dwyer et al 2003, Kerr et al 2004, A B Watters et al 2006) confirm that the ages of large, old fish determined with transverse section microscopy show some underestimation compared to radiometric methods, but the life history interpretation made from the data is the same. Watters et al (2006) concluded that it is appropriate "to use traditional cross-sectional methods (thin section or breakand-burn) to estimate age for Sebastes rufus", as not all fishery scientists have access to radiometric technology. Therefore, we argue that it is better to have a potentially underestimated age estimate for misty grouper than none at all, such that these data can be input into classical methodologies in fishery management, including determination of a von Bertalanffy growth model.…”

Section: Resultsmentioning

confidence: 96%

Age Estimates of Two Large Misty Grouper, Epinephelus mystacinus (Serranidae) from Bermuda with a Comparison of the Age of Tropical Groupers in the Western Atlantic

Luckhurst¹,

Dean

2009

GCR

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Section: Resultsmentioning

confidence: 96%

Age Estimates of Two Large Misty Grouper, Epinephelus mystacinus (Serranidae) from Bermuda with a Comparison of the Age of Tropical Groupers in the Western Atlantic

Luckhurst¹,

Dean

2009

GCR

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“…Our expectation of fish growth in either the Arctic or deep ocean is that of long life and slow growth due to cold temperatures and restricted food supply (e.g., Power 1997;Watters et al 2006). Age and growth studies to date only partially confirm these expectations, with reported growth rates higher than expected.…”

Section: Introductionmentioning

confidence: 91%

Growth analysis and age validation of a deepwater Arctic fish, the Greenland halibut (Reinhardtius hippoglossoides)

Treble

Campana

Wastle

et al. 2008

Can. J. Fish. Aquat. Sci.

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The accuracy of age interpretations on a deep-sea, Arctic fish species, the Greenland halibut ( Reinhardtius hippoglossoides ) was tested using several age validation methods. Consistent annual growth increments were either not formed or not visible in either whole or sectioned otoliths from three fish marked with oxytetracyline and recaptured after 2–4 years at liberty. Bomb radiocarbon assays based on a local reference chronology indicated that both whole and sectioned otoliths underestimated age by 1–15 years, with an average of 6 years. Growth rates estimated using the tag recapture model GROTAG were consistent with growth rates based on the radiocarbon assays and were less than half that of previously reported growth rates. The failure of otolith sections to provide an accurate age is unusual, but may be symptomatic of very slow-growing species with unusually shaped otoliths. Greenland halibut living in the deep-sea, Arctic environment are slower growing and longer lived than previously suspected, suggesting that the age-structured basis for current fisheries management warrants careful examination. Our results highlight the importance of using rigorous tests of ageing accuracy for exploited species and confirm that such age validation methods can be applied successfully in challenging environments such as the deep sea or the Arctic.

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“…The first application of lead-radium dating to otoliths in general was an age validation study on the splitnose rockfish (S. diploproa) in which a 60 yr lifespan was supported for the growth-zone age estimation criteria (Bennett et al 1982). Since this pioneering application, the technique has been applied to several other rockfishes with varying degrees of age resolution (Campana et al 1990, Kline 1996, Kastelle et al 2000, Andrews et al 2002, Stevens et al 2004, Andrews et al 2005, Watters et al 2006. For the bomb radiocarbon technique, its application to fish otoliths began with fishes in the southern hemisphere (Kalish 1993, Kalish 2001, followed by a series of studies in the northern hemisphere (e.g., Campana 1997, Kalish et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Age validation of canary rockfish (Sebastes pinniger) using two independent otolith techniques: lead-radium and bomb radiocarbon dating

Andrews

Kerr

Cailliet

et al. 2007

Mar. Freshwater Res.

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Canary rockfish (Sebastes pinniger) have long been an important part of recreational and commercial rockfish fishing from south-east Alaska to southern California, but localised stock abundances have declined considerably. Based on age estimates from otoliths and other structures, lifespan estimates vary from ~20 years to over 80 years. For the purpose of monitoring stocks, age composition is routinely estimated by counting growth zones in otoliths; however, age estimation procedures and lifespan estimates remain largely unvalidated. Typical age validation techniques have limited application for canary rockfish because they are deep-dwelling and may be long-lived. In this study, the unaged otolith of the pair from fish aged at the Department of Fisheries and Oceans Canada was used in one of two age validation techniques: (1) lead-radium dating and (2) bomb radiocarbon (14C) dating. Age estimate accuracy and the validity of age estimation procedures were validated based on the results from each technique. Lead-radium dating proved successful in determining that a minimum estimate of lifespan was 53 years and provided support for age estimation procedures up to ~50–60 years. These findings were further supported by Δ14C data, which indicated that a minimum estimate of lifespan was 44 ± 3 years. Both techniques validate, to differing degrees, age estimation procedures and provide support for inferring that canary rockfish can live more than 80 years.

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Radiometric age confirmation and growth of a deep-water marine fish species: The bank rockfish, Sebastes rufus

Cited by 7 publications

References 27 publications

Age Estimates of Two Large Misty Grouper, Epinephelus mystacinus (Serranidae) from Bermuda with a Comparison of the Age of Tropical Groupers in the Western Atlantic

Age Estimates of Two Large Misty Grouper, Epinephelus mystacinus (Serranidae) from Bermuda with a Comparison of the Age of Tropical Groupers in the Western Atlantic

Growth analysis and age validation of a deepwater Arctic fish, the Greenland halibut (Reinhardtius hippoglossoides)

Age validation of canary rockfish (Sebastes pinniger) using two independent otolith techniques: lead-radium and bomb radiocarbon dating

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