Metabolic proxy for cephalopods: Stable carbon isotope values recorded in different biogenic carbonates

Chung, Ming‐Tsung; Chen, Ching-Yi; Shiao, Jen‐Chieh; Shirai, Kokoro; Wang, Chia-Hui

doi:10.1111/2041-210x.13630

Cited by 10 publications

(26 citation statements)

References 79 publications

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“…We interpret this to result from an accelerated rate of growth shortly after hatching. Our results are comparable to those of Chung et al [ 18 ] who calculated C meta values for specimens of nautilus based on previously published data on septal and DIC δ 13 C values. They calculated that C meta decreased from ~30% to ~10% through ontogeny.…”

Section: Discussionsupporting

confidence: 91%

“…While the δ 18 O of the shell allows us to reconstruct the water temperature and thus habitat depth of nautilus, the δ 13 C of the shell has been considered difficult to interpret as a proxy for paleoenvironment. This is because the δ 13 C of the shell is both a function of carbon incorporated via the metabolism of the animal as well as a function of the dissolved inorganic carbon (DIC) [ 17 , 18 ]. Elucidating the fraction of metabolic carbon in the δ 13 C of the shell is of importance because it can permit the reconstruction of the DIC of the ancient oceans as a new proxy.…”

Section: Introductionmentioning

confidence: 99%

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Isotopic evidence concerning the habitat of Nautilus macromphalus in New Caledonia

et al. 2022

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Modern nautilids (Nautilus and Allonautilus) have often been studied by paleontologists to better understand the anatomy and ecology of fossil relatives. Because direct observations of these animals are difficult, the analysis of light stable isotopes (C, O) preserved in their shells has been employed to reveal their habitat and life history. We aim to (1) reconstruct the habitat depth of Nautilus macromphalus and (2) decipher the fraction of metabolic carbon in its shell by analyzing oxygen and carbon isotopes (δ18O, δ13C) in the septa of two specimens in combination with analyses of water samples from the area. Additionally, we investigate whether morphological changes during ontogeny are reflected in the isotopic values of the shells. Results reveal that the patterns of change of δ18O and δ13C in the septa of N. macromphalus pre- and post-hatching are consistent with previous studies. Values of δ18Owater range from 0.7 to 1.4‰ (VSMOW), with a maximum value coincident with a salinity maximum at ~150 m. We use the temperature and δ18Owater profiles to calculate equilibrium values of δ18Oaragonite with depth. Comparing these values with the measured δ18O of the septa shows that the habitat depth of N. macromphalus is ~140 m pre-hatching and ~370 m post-hatching. Using δ13C of shell carbonate and published data on metabolic carbon, the fraction of metabolic carbon is reconstructed as ~21% and 14% pre- and post-hatching, respectively. The reconstructed depth pre-hatching is slightly shallower than in N. pompilius from the Philippines and Fiji, but the post-hatching depth is similar. However, it is important to emphasize that these estimates represent average over time and space because nautilus is a mobile animal. Lastly, the changes in morphological parameters and the changes in δ13C and δ18O during ontogeny do not coincide except at hatching and at the onset of maturity.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Isotopic evidence concerning the habitat of Nautilus macromphalus in New Caledonia

et al. 2022

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“…However, seasonal fluctuations of temperature and salinity can influence δ 18 O biomin values, and the magnitude of this influence varies between regions. For example, when global δ 18 O values in barnacle calcite were predicted for individual seasons, midlatitudinal regions (30° to 60°) with large annual temperature gradients exhibited the greatest variance in isotope values (up to 1.9 ± 0.7 ‰) (Pearson et al, 2020) to diet and metabolic influences (Chung et al, 2019(Chung et al, , 2021Martino et al, 2020). By contrast, neodymium isotopes ( 143 Nd/ 144 Nd ratios expressed as Ɛ Nd values) are indicated to be governed by continental geology, resulting in distinct geographic ocean profiles with high spatial resolution (Jeandel et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Like δ 18 O biomin values, complementary universal chemical markers require predictable spatial variation coupled with common expression amongst species. While carbon isotopes (δ 13 C) in biominerals are commonly analysed concurrently with δ 18 O, they are unsuitable in this context as δ 13 C values in seawaters are generally homogenous (~0 ‰) and carbonate values can vary between individuals due to diet and metabolic influences (Chung et al, 2019, 2021; Martino et al, 2020). By contrast, neodymium isotopes ( 143 Nd/ 144 Nd ratios expressed as Ɛ Nd values) are indicated to be governed by continental geology, resulting in distinct geographic ocean profiles with high spatial resolution (Jeandel et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

The universal imprint of oxygen isotopes can track the origins of seafood

et al. 2022

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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 18 O biomin ), where we expect to see universally expressed and predictable spatial variation in δ 18 O biomin values across taxa. We constructed global ocean isoscapes of predicted δ 18 O biomin values specific to fish (otoliths), cephalopod (statoliths) and shellfish (shells), and a fourth combined "universal" isoscape, and evaluated their capacity to derive δ 18 O biomin values among known-origin samples. High correspondence between isoscape-predicted δ 18 O biomin values and a compiled database of measured, georeferenced values (3954 datapoints encompassing 68 species) indicated that this δ 18 O biomin approach works effectively, particularly in regions with highly resolved projections of seawater δ 18 O 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 machinelearning 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.

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“…In most biogenic carbonates, the carbon forming the biomineral is dominated either by the ambient or the metabolic source. In fish otoliths (but also cephalopod shells and to a lesser extent bivalves), both carbon sources typically contribute more than 10% of the total carbon in the blood, so that the relative proportion of metabolic compared to ambient carbon provides an analytically tractable proxy for variations in metabolic rate (Chung et al 2021a;McConnaughey et al 1997). Otolith δ 13 C values have been applied to infer relative metabolic rates of teleosts in relation to their life stages, functional behaviours, and experienced temperatures (Dufour et al 2007;Sherwood & Rose 2003;Sinnatamby et al 2015).…”

Section: Metabolic Ratementioning

confidence: 99%

Reading the biomineralized book of life: expanding otolith biogeochemical research and applications for fisheries and ecosystem-based management

Patrick

Gillanders

Sturrock

et al. 2022

Rev Fish Biol Fisheries

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Chemical analysis of calcified structures continues to flourish, as analytical and technological advances enable researchers to tap into trace elements and isotopes taken up in otoliths and other archival tissues at ever greater resolution. Increasingly, these tracers are applied to refine age estimation and interpretation, and to chronicle responses to environmental stressors, linking these to ecological, physiological, and life-history processes. Here, we review emerging approaches and innovative research directions in otolith chemistry, as well as in the chemistry of other archival tissues, outlining their value for fisheries and ecosystem-based management, turning the spotlight on areas where such biomarkers can support decision making. We summarise recent milestones and the challenges that lie ahead to using otoliths and archival tissues as biomarkers, grouped into seven, rapidly expanding and application-oriented research areas that apply chemical analysis in a variety of contexts, namely: (1) supporting fish age estimation; (2) evaluating environmental stress, ecophysiology and individual performance; (3) confirming seafood provenance; (4) resolving connectivity and movement pathways; (5) characterising food webs and trophic interactions; (6) reconstructing reproductive life histories; and (7) tracing stock enhancement efforts. Emerging research directions that apply hard part chemistry to combat seafood fraud, quantify past food webs, as well as to reconcile growth, movement, thermal, metabolic, stress and reproductive life-histories provide opportunities to examine how harvesting and global change impact fish health and fisheries productivity. Ultimately, improved appreciation of the many practical benefits of archival tissue chemistry to fisheries and ecosystem-based management will support their increased implementation into routine monitoring. Graphical abstract

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Metabolic proxy for cephalopods: Stable carbon isotope values recorded in different biogenic carbonates

Abstract: This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

Cited by 10 publications

References 79 publications

Isotopic evidence concerning the habitat of Nautilus macromphalus in New Caledonia

Isotopic evidence concerning the habitat of Nautilus macromphalus in New Caledonia

The universal imprint of oxygen isotopes can track the origins of seafood

Reading the biomineralized book of life: expanding otolith biogeochemical research and applications for fisheries and ecosystem-based management

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