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Isotopic life-history signatures are retained in modern and ancient Atlantic bluefin tuna vertebrae.
Andrews, Adam J; Orton, David; Onar, Vedat; Addis, Piero; Tinti, Fausto; Alexander, Michelle.
Afiliación
  • Andrews AJ; Department of Biological, Geological and Environmental Sciences, University of Bologna, Ravenna, Italy.
  • Orton D; BioArCh, Department of Archaeology, University of York, York, UK.
  • Onar V; Osteoarchaeology Practice and Research Centre and Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey.
  • Addis P; Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy.
  • Tinti F; Department of Biological, Geological and Environmental Sciences, University of Bologna, Ravenna, Italy.
  • Alexander M; BioArCh, Department of Archaeology, University of York, York, UK.
J Fish Biol ; 103(1): 118-129, 2023 Jul.
Article en En | MEDLINE | ID: mdl-37185985
Isotopic, tagging and diet studies of modern-day teleosts lacked the ability to contextualise life-history and trophic dynamics with a historical perspective, when exploitation rates were lower and climatic conditions differed. Isotopic analysis of vertebrae, the most plentiful hard-part in archaeological and museum collections, can potentially fill this data-gap. Chemical signatures of habitat and diet use during growth are retained by vertebrae during bone formation. Nonetheless, to fulfil their potential to reveal life-history and trophic dynamics, we need a better understanding of the time frame recorded by vertebrae, currently lacking due to a poor understanding of fish bone remodelling. To address this issue, the authors serially-sectioned four vertebral centra of the highly migratory Atlantic bluefin tuna (Thunnus thynnus; BFT) captured off Sardinia (Italy) and analysed their isotopic composition. They show how carbon (δ13 C), nitrogen (δ15 N) and sulphur (δ34 S) isotope values can vary significantly across BFT vertebrae growth-axes, revealing patterning in dietary life histories. Further, they find that similar patterns are revealed through incremental isotopic analysis of inner and outer vertebrae centra samples from 13 archaeological BFT vertebrae dating between the 9th and13th centuries CE. The results indicate that multi-year foraging signatures are retained in vertebrae and allow for the study of life histories in both modern and paleo-environments. These novel methods can be extended across teleost taxa owing to their potential to inform management and conservation on how teleost trophic dynamics change over time and what their long-term environmental, ecological and anthropological drivers are.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Atún / Ecosistema Límite: Animals Idioma: En Revista: J Fish Biol Año: 2023 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Atún / Ecosistema Límite: Animals Idioma: En Revista: J Fish Biol Año: 2023 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Reino Unido