ArticlePloS one2018
Validation of Growth Layer Group (GLG) depositional rate using daily incremental growth lines in the dentin of beluga (Delphinapterus leucas (Pallas, 1776)) teeth.
Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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15 citing papers in PubMed, 32 citations in OpenAlex.
- Article
- Pre- and Postnatal Ontogeny of Brain Size in Beluga and Bowhead Whales.Brain, behavior and evolution · 2026Article
- Dental Ageing Offers New Insights Into the First Epigenetic Clock for Common Dolphins (Ecology and evolution · 2025Article
- Dental aging offers new insights to the first epigenetic clock for common dolphins (bioRxiv : the preprint server for biology · 2025Article
- Possible niche compression and individual specialization in Pacific Arctic beluga (Ecology and evolution · 2023Article
- An epigenetic DNA methylation clock for age estimates in Indo-Pacific bottlenose dolphins (Evolutionary applications · 2023Article
- Cetaceans Humerus Radiodensity by CT: A Useful Technique Differentiating between Species, Ecophysiology, and Age.Animals : an open access journal from MDPI · 2022Article
- Evolution of amniote dentine apposition rates.Biology letters · 2022Article
- A histological description of alpaca (Frontiers in veterinary science · 2022Article
- Larger body size leads to greater female beluga whale ovarian reproductive activity at the southern periphery of their range.Ecology and evolution · 2021Article
- Characterization of short-period and long-period incremental markings in porcine enamel and dentine-Results of a fluorochrome labelling study in wild boar and domestic pigs.Journal of anatomy · 2021Article
- Multi-species and multi-tissue methylation clocks for age estimation in toothed whales and dolphins.Communications biology · 2021Article
- An epigenetic clock to estimate the age of living beluga whales.Evolutionary applications · 2021Article
- A Model for Dental Age Verification Using Ultrastructural Imaging for Modern and Fossil Representatives of the Rhinocerotidae Family.Animals : an open access journal from MDPI · 2021Article
- Analyses of ovarian activity reveal repeated evolution of post-reproductive lifespans in toothed whales.Scientific reports · 2018Article
Corrections and comments
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Authors and funding
4 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Counts of Growth Layer Groups (GLGs) in the dentin of marine mammal teeth are widely used as indicators of age. In most marine mammals, observations document that GLGs are deposited yearly, but in beluga whales, some studies have supported the view that two GLGs are deposited each year. Our understanding of beluga life-history differs substantially depending on assumptions regarding the timing of GLG deposition; therefore, resolving this issue has important considerations for population assessments. In this study, we used incremental lines that represent daily pulses of dentin mineralization to test the hypothesis that GLGs in beluga dentin are deposited on a yearly basis. Our estimate of the number of daily growth lines within one GLG is remarkably close to 365 days within error, supporting the hypothesis that GLGs are deposited annually in beluga. We show that measurement of daily growth increments can be used to validate the time represented by GLGs in beluga. Furthermore, we believe this methodology may have broader applications to age estimation in other taxa.
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