Differences in metabolic rate between two Atlantic cod ( Gadus morhua ) populations estimated with carbon isotopic composition in otoliths
The isotopic composition of inorganic carbon in otoliths (δ 13 C oto ) can be a useful tracer of metabolic rates and a method to study ecophysiology in wild fish. We evaluated environmental and physiological sources of δ 13 C oto variation in Icelandic and Northeast Arctic (NEA) cod (Gadus morhua) o...
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2021
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ftuniaarhuspubl:oai:pure.atira.dk:publications/8d9bc64d-9d0a-4284-be48-6fe86713e8e2 2023-05-15T15:14:39+02:00 Differences in metabolic rate between two Atlantic cod ( Gadus morhua ) populations estimated with carbon isotopic composition in otoliths Smoliński, Szymon Denechaud, Côme von Leesen, Gotje Geffen, Audrey J. Grønkjær, Peter Godiksen, Jane A. Campana, Steven E. 2021-04 https://pure.au.dk/portal/da/publications/differences-in-metabolic-rate-between-two-atlantic-cod-gadus-morhua-populations-estimated-with-carbon-isotopic-composition-in-otoliths(8d9bc64d-9d0a-4284-be48-6fe86713e8e2).html https://doi.org/10.1371/journal.pone.0248711 http://www.scopus.com/inward/record.url?scp=85103755642&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Smoliński , S , Denechaud , C , von Leesen , G , Geffen , A J , Grønkjær , P , Godiksen , J A & Campana , S E 2021 , ' Differences in metabolic rate between two Atlantic cod ( Gadus morhua ) populations estimated with carbon isotopic composition in otoliths ' , PLOS ONE , vol. 16 , no. 4 , e0248711 . https://doi.org/10.1371/journal.pone.0248711 article 2021 ftuniaarhuspubl https://doi.org/10.1371/journal.pone.0248711 2021-05-19T22:45:08Z The isotopic composition of inorganic carbon in otoliths (δ 13 C oto ) can be a useful tracer of metabolic rates and a method to study ecophysiology in wild fish. We evaluated environmental and physiological sources of δ 13 C oto variation in Icelandic and Northeast Arctic (NEA) cod (Gadus morhua) over the years 1914–2013. Individual annual growth increments of otoliths formed at age 3 and 8 were micromilled and measured by isotope-ratio mass spectrometry. Simultaneously, all annual increment widths of the otoliths were measured providing a proxy of fish somatic growth. We hypothesized that changes in the physiological state of the organism, reflected by the isotopic composition of otoliths, can affect the growth rate. Using univariate and multivariate mixed-effects models we estimated conditional correlations between carbon isotopic composition and growth of fish at different levels (within individuals, between individuals, and between years), controlling for intrinsic and extrinsic effects on both otolith measurements. δ 13 C oto was correlated with growth within individuals and between years, which was attributed to the intrinsic effects (fish age or total length). There was no significant correlation between δ 13 C oto and growth between individuals, which suggests that caution is needed when interpreting δ 13 C oto signals. We found a significant decrease in δ 13 C oto through the century which was explained by the oceanic Suess effect-admixture of isotopically light carbon from fossil fuel. We calculated the proportion of the respired carbon in otolith carbonate (C resp ) using carbon isotopic composition in diet and dissolved inorganic carbon of the seawater. This approach allowed us to correct the values for each stock in relation to these two environmental baselines. C resp was on average 0.275 and 0.295 in Icelandic and NEA stock, respectively. Our results provide an insight into the physiological basis for differences in growth characteristics between these two cod stocks, and how that may vary over time. Article in Journal/Newspaper Arctic atlantic cod Gadus morhua Aarhus University: Research Arctic PLOS ONE 16 4 e0248711 |
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Open Polar |
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Aarhus University: Research |
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ftuniaarhuspubl |
language |
English |
description |
The isotopic composition of inorganic carbon in otoliths (δ 13 C oto ) can be a useful tracer of metabolic rates and a method to study ecophysiology in wild fish. We evaluated environmental and physiological sources of δ 13 C oto variation in Icelandic and Northeast Arctic (NEA) cod (Gadus morhua) over the years 1914–2013. Individual annual growth increments of otoliths formed at age 3 and 8 were micromilled and measured by isotope-ratio mass spectrometry. Simultaneously, all annual increment widths of the otoliths were measured providing a proxy of fish somatic growth. We hypothesized that changes in the physiological state of the organism, reflected by the isotopic composition of otoliths, can affect the growth rate. Using univariate and multivariate mixed-effects models we estimated conditional correlations between carbon isotopic composition and growth of fish at different levels (within individuals, between individuals, and between years), controlling for intrinsic and extrinsic effects on both otolith measurements. δ 13 C oto was correlated with growth within individuals and between years, which was attributed to the intrinsic effects (fish age or total length). There was no significant correlation between δ 13 C oto and growth between individuals, which suggests that caution is needed when interpreting δ 13 C oto signals. We found a significant decrease in δ 13 C oto through the century which was explained by the oceanic Suess effect-admixture of isotopically light carbon from fossil fuel. We calculated the proportion of the respired carbon in otolith carbonate (C resp ) using carbon isotopic composition in diet and dissolved inorganic carbon of the seawater. This approach allowed us to correct the values for each stock in relation to these two environmental baselines. C resp was on average 0.275 and 0.295 in Icelandic and NEA stock, respectively. Our results provide an insight into the physiological basis for differences in growth characteristics between these two cod stocks, and how that may vary over time. |
format |
Article in Journal/Newspaper |
author |
Smoliński, Szymon Denechaud, Côme von Leesen, Gotje Geffen, Audrey J. Grønkjær, Peter Godiksen, Jane A. Campana, Steven E. |
spellingShingle |
Smoliński, Szymon Denechaud, Côme von Leesen, Gotje Geffen, Audrey J. Grønkjær, Peter Godiksen, Jane A. Campana, Steven E. Differences in metabolic rate between two Atlantic cod ( Gadus morhua ) populations estimated with carbon isotopic composition in otoliths |
author_facet |
Smoliński, Szymon Denechaud, Côme von Leesen, Gotje Geffen, Audrey J. Grønkjær, Peter Godiksen, Jane A. Campana, Steven E. |
author_sort |
Smoliński, Szymon |
title |
Differences in metabolic rate between two Atlantic cod ( Gadus morhua ) populations estimated with carbon isotopic composition in otoliths |
title_short |
Differences in metabolic rate between two Atlantic cod ( Gadus morhua ) populations estimated with carbon isotopic composition in otoliths |
title_full |
Differences in metabolic rate between two Atlantic cod ( Gadus morhua ) populations estimated with carbon isotopic composition in otoliths |
title_fullStr |
Differences in metabolic rate between two Atlantic cod ( Gadus morhua ) populations estimated with carbon isotopic composition in otoliths |
title_full_unstemmed |
Differences in metabolic rate between two Atlantic cod ( Gadus morhua ) populations estimated with carbon isotopic composition in otoliths |
title_sort |
differences in metabolic rate between two atlantic cod ( gadus morhua ) populations estimated with carbon isotopic composition in otoliths |
publishDate |
2021 |
url |
https://pure.au.dk/portal/da/publications/differences-in-metabolic-rate-between-two-atlantic-cod-gadus-morhua-populations-estimated-with-carbon-isotopic-composition-in-otoliths(8d9bc64d-9d0a-4284-be48-6fe86713e8e2).html https://doi.org/10.1371/journal.pone.0248711 http://www.scopus.com/inward/record.url?scp=85103755642&partnerID=8YFLogxK |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic atlantic cod Gadus morhua |
genre_facet |
Arctic atlantic cod Gadus morhua |
op_source |
Smoliński , S , Denechaud , C , von Leesen , G , Geffen , A J , Grønkjær , P , Godiksen , J A & Campana , S E 2021 , ' Differences in metabolic rate between two Atlantic cod ( Gadus morhua ) populations estimated with carbon isotopic composition in otoliths ' , PLOS ONE , vol. 16 , no. 4 , e0248711 . https://doi.org/10.1371/journal.pone.0248711 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0248711 |
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PLOS ONE |
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16 |
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4 |
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e0248711 |
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