ArticleProceedings. Biological sciences2016
Time in tortoiseshell: a bomb radiocarbon-validated chronology in sea turtle scutes.
Article in Proceedings. Biological sciences, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 28 citations in OpenAlex.
- State-of-the-Art Age Determination Methods for Amphibians and Reptiles.Animals : an open access journal from MDPI · 2025Review
- Assessing the influence of blubber stratification on the estimation of diet in phocid seals using the MixSIAR model.Scientific reports · 2025Article
- Anthropogenic uranium signatures in turtles, tortoises, and sea turtles from nuclear sites.PNAS nexus · 2023Article
- Robust age estimation of southern sea otters from multiple morphometrics.Ecology and evolution · 2020Article
- Herbaria macroalgae as a proxy for historical upwelling trends in Central California.Proceedings. Biological sciences · 2020Article
- The historical development of complex global trafficking networks for marine wildlife.Science advances · 2019Article
- Densities and drivers of sea turtle populations across Pacific coral reef ecosystems.PloS one · 2019Article
- Trophic signatures of seabirds suggest shifts in oceanic ecosystems.Science advances · 2018Article
- Article
- The developmental biogeography of hawksbill sea turtles in the North Pacific.Ecology and evolution · 2016Article
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Authors and funding
5 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Some of the most basic questions of sea turtle life history are also the most elusive. Many uncertainties surround lifespan, growth rates, maturity and spatial structure, yet these are critical factors in assessing population status. Here we examine the keratinized hard tissues of the hawksbill (Eretmochelys imbricata) carapace and use bomb radiocarbon dating to estimate growth and maturity. Scutes have an established dietary record, yet the large keratin deposits of hawksbills evoke a reliable chronology. We sectioned, polished and imaged posterior marginal scutes from 36 individual hawksbills representing all life stages, several Pacific populations and spanning eight decades. We counted the apparent growth lines, microsampled along growth contours and calibrated Δ(14)C values to reference coral series. We fit von Bertalanffy growth function (VBGF) models to the results, producing a range of age estimates for each turtle. We find Hawaii hawksbills deposit eight growth lines annually (range 5-14), with model ensembles producing a somatic growth parameter (k) of 0.13 (range 0.1-0.2) and first breeding at 29 years (range 23-36). Recent bomb radiocarbon values also suggest declining trophic status. Together, our results may reflect long-term changes in the benthic community structure of Hawaii reefs, and possibly shed light on the critical population status for Hawaii hawksbills.
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