The universal imprint of oxygen isotopes can track the origins of seafood
The universal imprint of oxygen isotopes can track the origins of seafood
Identifying the source of seafood is critical for combatting seafood fraud, but current tools are predominantly developed and applied on a species-specific basis. This study investigates how multiple marine taxa could be geolocated at global scales by exploiting stable oxygen isotope compositions in carbonate biominerals (δ
18O
biomin), where we expect to see universally expressed and predictable spatial variation in δ
18O
biomin values across taxa. We constructed global ocean isoscapes of predicted δ
18O
biomin values specific to fish (otoliths), cephalopod (statoliths) and shellfish (shells), and a fourth combined “universal” isoscape, and evaluated their capacity to derive δ
18O
biomin values among known-origin samples. High correspondence between isoscape-predicted δ
18O
biomin values and a compiled database of measured, georeferenced values (3954 datapoints encompassing 68 species) indicated that this δ
18O
biomin approach works effectively, particularly in regions with highly resolved projections of seawater δ
18O composition. When compared to taxon-specific isoscapes, the universal isoscape demonstrated similar accuracy, indicating exciting potential for universal provenance applications. We tested the universal framework via a case study, using machine-learning models to identify sample origins amongst regions of divergent (Tropical Asia vs Temperate Australasia) and similar (Temperate Asia vs Temperate Australasia) climates and latitudes. Classification accuracy averaged 75.3% between divergent regions, and 66% between similar regions. When endothermic tuna species were excluded from the analysis, the accuracy between divergent regions increased up to 90% between divergent regions. This study presents the first empirical step towards developing universal chemical markers, which have the potential to support a more inclusive and global approach of validating provenance of seafood.
authentication, biominerals, fingerprinting, global model, isoscape, provenance
1455-1468
Martino, Jasmin C.
56a2ede4-21e8-44b5-96fe-89d01f5c23fe
Trueman, Clive
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Mazumder, Debashish
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Crawford, Jagoda
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Doubleday, Zoë A.
bfa616ee-ad45-41dd-893e-454325c7406c
22 September 2022
Martino, Jasmin C.
56a2ede4-21e8-44b5-96fe-89d01f5c23fe
Trueman, Clive
d00d3bd6-a47b-4d47-89ae-841c3d506205
Mazumder, Debashish
d0303bf4-89ff-4982-b820-072ce79873dc
Crawford, Jagoda
5c4242e4-ad68-4039-bede-25339f29dba9
Doubleday, Zoë A.
bfa616ee-ad45-41dd-893e-454325c7406c
Martino, Jasmin C., Trueman, Clive, Mazumder, Debashish, Crawford, Jagoda and Doubleday, Zoë A.
(2022)
The universal imprint of oxygen isotopes can track the origins of seafood.
Fish and Fisheries, 23 (6), .
(doi:10.1111/faf.12703).
Abstract
Identifying the source of seafood is critical for combatting seafood fraud, but current tools are predominantly developed and applied on a species-specific basis. This study investigates how multiple marine taxa could be geolocated at global scales by exploiting stable oxygen isotope compositions in carbonate biominerals (δ
18O
biomin), where we expect to see universally expressed and predictable spatial variation in δ
18O
biomin values across taxa. We constructed global ocean isoscapes of predicted δ
18O
biomin values specific to fish (otoliths), cephalopod (statoliths) and shellfish (shells), and a fourth combined “universal” isoscape, and evaluated their capacity to derive δ
18O
biomin values among known-origin samples. High correspondence between isoscape-predicted δ
18O
biomin values and a compiled database of measured, georeferenced values (3954 datapoints encompassing 68 species) indicated that this δ
18O
biomin approach works effectively, particularly in regions with highly resolved projections of seawater δ
18O composition. When compared to taxon-specific isoscapes, the universal isoscape demonstrated similar accuracy, indicating exciting potential for universal provenance applications. We tested the universal framework via a case study, using machine-learning models to identify sample origins amongst regions of divergent (Tropical Asia vs Temperate Australasia) and similar (Temperate Asia vs Temperate Australasia) climates and latitudes. Classification accuracy averaged 75.3% between divergent regions, and 66% between similar regions. When endothermic tuna species were excluded from the analysis, the accuracy between divergent regions increased up to 90% between divergent regions. This study presents the first empirical step towards developing universal chemical markers, which have the potential to support a more inclusive and global approach of validating provenance of seafood.
Text
Fish and Fisheries - 2022 - Martino - The universal imprint of oxygen isotopes can track the origins of seafood
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More information
Accepted/In Press date: 1 August 2022
e-pub ahead of print date: 7 September 2022
Published date: 22 September 2022
Additional Information:
Funding Information:
This project was funded by an Australian Research Council Future Fellowship awarded to Doubleday (FT190100244).
Publisher Copyright:
© 2022 The Authors. Fish and Fisheries published by John Wiley & Sons Ltd.
Keywords:
authentication, biominerals, fingerprinting, global model, isoscape, provenance
Identifiers
Local EPrints ID: 471370
URI: http://eprints.soton.ac.uk/id/eprint/471370
ISSN: 1467-2960
PURE UUID: 5f9e20bd-aab3-44ab-bc5a-f756b8f32c1e
Catalogue record
Date deposited: 04 Nov 2022 17:34
Last modified: 17 Mar 2024 02:58
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Contributors
Author:
Jasmin C. Martino
Author:
Debashish Mazumder
Author:
Jagoda Crawford
Author:
Zoë A. Doubleday
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