Investigating bomb radiocarbon transport in the southern Pacific Ocean with otolith radiocarbon

Grammer, Gretchen L.; Fallon, Stewart; Izzo, Christopher; Wood, Rachel; Gillanders, Bronwyn M.

doi:10.1016/j.epsl.2015.05.008

Cited by 17 publications

(9 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Through 14 C assays of both the core and edge of the otoliths of deep-dwelling fish species, Horn et al (2010) were able to demonstrate that there was a delay of 10-15 years in the penetration of the 14 C signal to depths of 300-600 m in the south-west Pacific. Independent and more detailed otolith radiocarbon assays by Grammer et al (2015) documented a 5-10-year delay in radiocarbon penetration to a depth of 400-500 m in the Tasman Sea. In the north-east Atlantic, the D 14 C penetration depth increased by 1000 m over a period of 18 years (Nydal 1993); assuming a linear increase in depth through time, starting from the base of the 200-m mixed layer, this would imply that it would take 4.5 years for the signal to penetrate to the mean 450-m depth of the redfish in the present study.…”

Section: Discussionmentioning

confidence: 99%

Image-enhanced burnt otoliths, bomb radiocarbon and the growth dynamics of redfish (Sebastes mentella and S. fasciatus) off the eastern coast of Canada

Campana

Valentin

MacLellan

et al. 2016

Mar. Freshwater Res.

View full text Add to dashboard Cite

Abstract. Many past attempts to age deep-water redfish (Sebastes mentella) and Acadian redfish (S. fasciatus) in the north-west Atlantic have been stymied by inappropriate ageing methods, the absence of age validation and the failure to differentiate among species. Herein we report substantial improvements in methods for ageing Sebastes spp. by linking the established 'crack and burn' method to modern sectioning and image-enhancement protocols. Bomb radiocarbon assays of the otolith core and monitoring of year-class progression confirmed the accuracy of the resulting age determinations to an age of 46 years. The use of microsatellite DNA to confirm species identity eliminated past confusion caused by species mixtures. Age determinations of 1252 redfish from the eastern coast of Canada demonstrated the presence of significant differences in growth rate and longevity both between the two redfish species and among populations and stocks, with a maximum observed longevity of 70 years. Even within species and stocks, an individual fish with a fork length of 38 cm could be anywhere between 15 and 50 years of age, highlighting a near cessation of somatic growth after sexual maturation. In keeping with other deep-water species, sustainable management will require more attention to the low productivity expected of redfish stocks, rather than the high initial biomass that can support short-term but high catch rates.Additional keywords: age validation, annuli, break and burn, 14 C, false check.

show abstract

Section: Discussionmentioning

confidence: 99%

Image-enhanced burnt otoliths, bomb radiocarbon and the growth dynamics of redfish (Sebastes mentella and S. fasciatus) off the eastern coast of Canada

Campana

Valentin

MacLellan

et al. 2016

Mar. Freshwater Res.

View full text Add to dashboard Cite

show abstract

“…Previous research involved the use of otolith for 14 C chronology (Piner and Wischniowski 2004; Alves et al 2015b), reservoir effect calculations (Kalish 1993; Alves et al 2015b; Milheira et al 2017; Macario et al 2018), isotope-derived paleotemperature (Thorrold et al 1997; Ghosh et al 2007; Darnaude et al 2014; Bertucci et al 2018), fish growing (Cook et al 2009; Andrews et al 2011), isotope fish migration signals (Holbach et al 2012; Darnaude et al 2014), environmental geochemistry (Albuquerque et al 2012; Stanley et al 2015) and palaeoceanography (Schloesser et al 2009; Grammer et al 2015). Following these works, we discuss the use of otolith for improving the accuracy in the 14 C dating of Brazilian shellmounds.…”

Section: Introductionmentioning

confidence: 99%

Otolith-Based Chronology of Brazilian Shellmounds

et al. 2019

View full text Add to dashboard Cite

The radiocarbon (14C) chronology of hunter-fisher-gatherers’ archaeological settlements along the Brazilian coast is usually based on mollusk shells, charcoal from hearths, and eventually human bones. However, fish otoliths are found in several archaeological contexts and may represent a reliable option as a chronological record. In this work, we compare the 14C dates of whitemouth croakers (Micropogonias furnieri) otoliths with dates obtained from other materials (shell and charcoal), collected from shellmounds on the coast of Rio de Janeiro, with the aim of improving the accuracy in the 14C dating of Brazilian shellmounds, strengthening the comprehension of the native populations’ occupational trends and the coeval palaeoceanographic context. Based on x-ray diffraction results for archaeological otoliths, their geochemical composition indicates minimal diagenesis effect over time even under burial conditions in the studied sites. The comparison between otolith dates and dates obtained from other proxies revealed similar results but with decreased deviations in otolith dates in all of the studied sites.

show abstract

“…This trend has also been observed in long-lived sebastines in the north Pacific Ocean, Gulf of Alaska, and Bering Sea 41 , 79 , as well as other Helicolenus spp. in the western Pacific 40 . The offset between surface reference and otolith core Δ 14 C for species living at depths > 500 m is often reported to be 100–150‰, which is in the same range as the offset between nGOM blackbelly rosefish otolith core Δ 14 C and reference series Δ 14 C values.…”

Section: Discussionmentioning

confidence: 99%

Eye lens-derived Δ14C signatures validate extreme longevity in the deepwater scorpaenid blackbelly rosefish (Helicolenus dactylopterus)

Chamberlin

Siders

Barnett

et al. 2023

Sci Rep

View full text Add to dashboard Cite

Many members of the scorpaenid subfamily: Sebastinae (rockfishes and their relatives) exhibit slow growth and extreme longevity (> 100 y), thus are estimated to be vulnerable to overfishing. Blackbelly rosefish (Helicolenus dactylopterus) is a deepwater sebastine whose longevity estimates range widely, possibly owing to different regional levels of fisheries exploitation across its Atlantic Ocean range. However, age estimation has not been validated for this species and ageing for sebastines in general is uncertain. We performed age validation of northern Gulf of Mexico blackbelly rosefish via an application of the bomb radiocarbon chronometer which utilized eye lens cores instead of more traditional otolith cores as the source of birth year Δ14C signatures. The correspondence of eye lens core Δ14C with a regional reference series was tested with a novel Bayesian spline analysis, which revealed otolith opaque zone counts provide accurate age estimates. Maximum observed longevity was 90 y, with 17.5% of individuals aged to be > 50 y. Bayesian growth analysis, with estimated length-at-birth included as a prior, revealed blackbelly rosefish exhibit extremely slow growth (k = 0.08 y−1). Study results have important implications for the management of blackbelly rosefish stocks, as extreme longevity and slow growth imply low resilience to fishing pressure.

show abstract

Investigating bomb radiocarbon transport in the southern Pacific Ocean with otolith radiocarbon

Cited by 17 publications

References 43 publications

Image-enhanced burnt otoliths, bomb radiocarbon and the growth dynamics of redfish (Sebastes mentella and S. fasciatus) off the eastern coast of Canada

Image-enhanced burnt otoliths, bomb radiocarbon and the growth dynamics of redfish (Sebastes mentella and S. fasciatus) off the eastern coast of Canada

Otolith-Based Chronology of Brazilian Shellmounds

Eye lens-derived Δ14C signatures validate extreme longevity in the deepwater scorpaenid blackbelly rosefish (Helicolenus dactylopterus)

Contact Info

Product

Resources

About