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First measurements of field metabolic rate in wild juvenile fishes show strong thermal sensitivity but variations between sympatric ecotypes

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First measurements of field metabolic rate in wild juvenile fishes show strong thermal sensitivity but variations between sympatric ecotypes. / Chung, Ming Tsung; Jørgensen, Kris Emil Mose; Trueman, Clive N. et al.

In: Oikos, Vol. 130, No. 2, 02.2021, p. 287-299.

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@article{6a84a1df367240f6bd04f68d1a36d4a0,
title = "First measurements of field metabolic rate in wild juvenile fishes show strong thermal sensitivity but variations between sympatric ecotypes",
abstract = "The relationship between physiology and temperature has a large influence on population-level responses to climate change. In natural settings, direct thermal effects on metabolism may be exaggerated or offset by behavioural responses influencing individual energy balance. Drawing on a newly developed proxy, we provide the first estimates of the thermal performance curve of field metabolism in a wild fish. We investigate the thermal sensitivity of field metabolic rate in two sympatric, genetically distinct ecotypes of Atlantic cod from the Skagerrak coast of southern Norway. The combined ecotype median of field metabolic rate increased with increasing temperature until around 16°C, coincident with the thermal optimum for growth for juvenile Atlantic cod. Individual cod experienced temperatures in excess of the thermal optimum for field metabolic rate, indicating some degree of thermal limitation of field metabolism in a complex natural environment with the potential for thermal refugia. The two cod ecotypes showed different thermal performance curves for field metabolic rate, revealing that genetic components to temperature sensitivity persist beyond acclimation effects. The cold-adapted fjord ecotype maintained higher field metabolic rates at cooler temperatures than the warm-adapted North Sea ecotype, which showed clear preference for warmer waters around the thermal optimum. Field metabolic rates of the two ecotypes were strongly influenced by year and location of sampling, implying more complex behavioural responses to environmental conditions. We emphasise that the energy uses reflecting physiological conditions in the field should be considered in the evaluation of the effect of climatic variables on fish population dynamics and demonstrate that otolith isotopes provide an analytical framework to answer this question.",
keywords = "metabolic range, otolith, phenotypic performance, stable carbon isotope, stable oxygen isotope",
author = "Chung, {Ming Tsung} and J{\o}rgensen, {Kris Emil Mose} and Trueman, {Clive N.} and Halvor Knutsen and Jorde, {Per Erik} and Peter Gr{\o}nkj{\ae}r",
note = "Funding Information: – This work is supported by the European Commission Marie Sk{\l}odowska‐Curie Individual Fellowships ({\textquoteleft}OTOLOG' project, 707481) and the European Regional Development Fund (Interreg IVa, {\textquoteleft}MarGen' and {\textquoteleft}MarGen II' projects). Funding Publisher Copyright: {\textcopyright} 2020 Nordic Society Oikos. Published by John Wiley & Sons Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",
year = "2021",
month = feb,
doi = "10.1111/oik.07647",
language = "English",
volume = "130",
pages = "287--299",
journal = "Oikos",
issn = "0030-1299",
publisher = "Wiley-Blackwell Publishing Ltd.",
number = "2",

}

RIS

TY - JOUR

T1 - First measurements of field metabolic rate in wild juvenile fishes show strong thermal sensitivity but variations between sympatric ecotypes

AU - Chung, Ming Tsung

AU - Jørgensen, Kris Emil Mose

AU - Trueman, Clive N.

AU - Knutsen, Halvor

AU - Jorde, Per Erik

AU - Grønkjær, Peter

N1 - Funding Information: – This work is supported by the European Commission Marie Skłodowska‐Curie Individual Fellowships (‘OTOLOG' project, 707481) and the European Regional Development Fund (Interreg IVa, ‘MarGen' and ‘MarGen II' projects). Funding Publisher Copyright: © 2020 Nordic Society Oikos. Published by John Wiley & Sons Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/2

Y1 - 2021/2

N2 - The relationship between physiology and temperature has a large influence on population-level responses to climate change. In natural settings, direct thermal effects on metabolism may be exaggerated or offset by behavioural responses influencing individual energy balance. Drawing on a newly developed proxy, we provide the first estimates of the thermal performance curve of field metabolism in a wild fish. We investigate the thermal sensitivity of field metabolic rate in two sympatric, genetically distinct ecotypes of Atlantic cod from the Skagerrak coast of southern Norway. The combined ecotype median of field metabolic rate increased with increasing temperature until around 16°C, coincident with the thermal optimum for growth for juvenile Atlantic cod. Individual cod experienced temperatures in excess of the thermal optimum for field metabolic rate, indicating some degree of thermal limitation of field metabolism in a complex natural environment with the potential for thermal refugia. The two cod ecotypes showed different thermal performance curves for field metabolic rate, revealing that genetic components to temperature sensitivity persist beyond acclimation effects. The cold-adapted fjord ecotype maintained higher field metabolic rates at cooler temperatures than the warm-adapted North Sea ecotype, which showed clear preference for warmer waters around the thermal optimum. Field metabolic rates of the two ecotypes were strongly influenced by year and location of sampling, implying more complex behavioural responses to environmental conditions. We emphasise that the energy uses reflecting physiological conditions in the field should be considered in the evaluation of the effect of climatic variables on fish population dynamics and demonstrate that otolith isotopes provide an analytical framework to answer this question.

AB - The relationship between physiology and temperature has a large influence on population-level responses to climate change. In natural settings, direct thermal effects on metabolism may be exaggerated or offset by behavioural responses influencing individual energy balance. Drawing on a newly developed proxy, we provide the first estimates of the thermal performance curve of field metabolism in a wild fish. We investigate the thermal sensitivity of field metabolic rate in two sympatric, genetically distinct ecotypes of Atlantic cod from the Skagerrak coast of southern Norway. The combined ecotype median of field metabolic rate increased with increasing temperature until around 16°C, coincident with the thermal optimum for growth for juvenile Atlantic cod. Individual cod experienced temperatures in excess of the thermal optimum for field metabolic rate, indicating some degree of thermal limitation of field metabolism in a complex natural environment with the potential for thermal refugia. The two cod ecotypes showed different thermal performance curves for field metabolic rate, revealing that genetic components to temperature sensitivity persist beyond acclimation effects. The cold-adapted fjord ecotype maintained higher field metabolic rates at cooler temperatures than the warm-adapted North Sea ecotype, which showed clear preference for warmer waters around the thermal optimum. Field metabolic rates of the two ecotypes were strongly influenced by year and location of sampling, implying more complex behavioural responses to environmental conditions. We emphasise that the energy uses reflecting physiological conditions in the field should be considered in the evaluation of the effect of climatic variables on fish population dynamics and demonstrate that otolith isotopes provide an analytical framework to answer this question.

KW - metabolic range

KW - otolith

KW - phenotypic performance

KW - stable carbon isotope

KW - stable oxygen isotope

UR - http://www.scopus.com/inward/record.url?scp=85096986002&partnerID=8YFLogxK

U2 - 10.1111/oik.07647

DO - 10.1111/oik.07647

M3 - Journal article

AN - SCOPUS:85096986002

VL - 130

SP - 287

EP - 299

JO - Oikos

JF - Oikos

SN - 0030-1299

IS - 2

ER -