Effects of temperature on tissue-diet isotopic spacing of nitrogen and carbon in otolith organic matter

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Effects of temperature on tissue-diet isotopic spacing of nitrogen and carbon in otolith organic matter. / Godiksen, Jane A.; Chung, Ming Tsung; Folkvord, Arild; Grønkjær, Peter.

I: Marine and Freshwater Research, Bind 72, 01.11.2019, s. 1757-1767.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

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Godiksen, JA, Chung, MT, Folkvord, A & Grønkjær, P 2019, 'Effects of temperature on tissue-diet isotopic spacing of nitrogen and carbon in otolith organic matter', Marine and Freshwater Research, bind 72, s. 1757-1767. https://doi.org/10.1071/MF19054

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Author

Godiksen, Jane A. ; Chung, Ming Tsung ; Folkvord, Arild ; Grønkjær, Peter. / Effects of temperature on tissue-diet isotopic spacing of nitrogen and carbon in otolith organic matter. I: Marine and Freshwater Research. 2019 ; Bind 72. s. 1757-1767.

Bibtex

@article{2261e6a42b9d4f0f95411380c8950aaf,
title = "Effects of temperature on tissue-diet isotopic spacing of nitrogen and carbon in otolith organic matter",
abstract = "Reconstruction of the trophic position of a fish can be performed by analysing stable nitrogen and carbon isotopes in otolith protein. However, ambient temperature may affect the tissue-diet isotopic spacing of stable isotopes from diet to predator tissue and bias estimates of trophic position. To test this, otolith protein, heart and muscle tissue from a rearing experiment with juvenile cod held at different temperatures (4, 7, 10 and 14°C) were analysed. There was no significant effect of temperature on otolith δ15N, whereas muscle and heart exhibited a slight decrease in δ15N values with increasing temperature corresponding to maximum of 0.6‰ over the 10°C range. By contrast, the otolith protein δ13C values at 4 and 7°C were significantly higher than for 10 and 14°C, suggesting an approximate 1‰ increased tissue-diet enrichment at the lower temperatures. Temperature had no significant effect on muscle and heart δ13C values. Considering the annual mean variation in ocean temperatures, our results indicate that the trophic signals recorded in the otoliths will reflect changes in diet isotope values with little bias from the ambient temperature experienced by the fish.",
keywords = "fish, food web, marine, otolith, stable isotopes",
author = "Godiksen, {Jane A.} and Chung, {Ming Tsung} and Arild Folkvord and Peter Gr{\o}nkj{\ae}r",
year = "2019",
month = nov,
day = "1",
doi = "10.1071/MF19054",
language = "English",
volume = "72",
pages = "1757--1767",
journal = "Marine and Freshwater Research",
issn = "1323-1650",
publisher = "C S I R O Publishing",

}

RIS

TY - JOUR

T1 - Effects of temperature on tissue-diet isotopic spacing of nitrogen and carbon in otolith organic matter

AU - Godiksen, Jane A.

AU - Chung, Ming Tsung

AU - Folkvord, Arild

AU - Grønkjær, Peter

PY - 2019/11/1

Y1 - 2019/11/1

N2 - Reconstruction of the trophic position of a fish can be performed by analysing stable nitrogen and carbon isotopes in otolith protein. However, ambient temperature may affect the tissue-diet isotopic spacing of stable isotopes from diet to predator tissue and bias estimates of trophic position. To test this, otolith protein, heart and muscle tissue from a rearing experiment with juvenile cod held at different temperatures (4, 7, 10 and 14°C) were analysed. There was no significant effect of temperature on otolith δ15N, whereas muscle and heart exhibited a slight decrease in δ15N values with increasing temperature corresponding to maximum of 0.6‰ over the 10°C range. By contrast, the otolith protein δ13C values at 4 and 7°C were significantly higher than for 10 and 14°C, suggesting an approximate 1‰ increased tissue-diet enrichment at the lower temperatures. Temperature had no significant effect on muscle and heart δ13C values. Considering the annual mean variation in ocean temperatures, our results indicate that the trophic signals recorded in the otoliths will reflect changes in diet isotope values with little bias from the ambient temperature experienced by the fish.

AB - Reconstruction of the trophic position of a fish can be performed by analysing stable nitrogen and carbon isotopes in otolith protein. However, ambient temperature may affect the tissue-diet isotopic spacing of stable isotopes from diet to predator tissue and bias estimates of trophic position. To test this, otolith protein, heart and muscle tissue from a rearing experiment with juvenile cod held at different temperatures (4, 7, 10 and 14°C) were analysed. There was no significant effect of temperature on otolith δ15N, whereas muscle and heart exhibited a slight decrease in δ15N values with increasing temperature corresponding to maximum of 0.6‰ over the 10°C range. By contrast, the otolith protein δ13C values at 4 and 7°C were significantly higher than for 10 and 14°C, suggesting an approximate 1‰ increased tissue-diet enrichment at the lower temperatures. Temperature had no significant effect on muscle and heart δ13C values. Considering the annual mean variation in ocean temperatures, our results indicate that the trophic signals recorded in the otoliths will reflect changes in diet isotope values with little bias from the ambient temperature experienced by the fish.

KW - fish

KW - food web

KW - marine

KW - otolith

KW - stable isotopes

UR - http://www.scopus.com/inward/record.url?scp=85075395581&partnerID=8YFLogxK

U2 - 10.1071/MF19054

DO - 10.1071/MF19054

M3 - Journal article

AN - SCOPUS:85075395581

VL - 72

SP - 1757

EP - 1767

JO - Marine and Freshwater Research

JF - Marine and Freshwater Research

SN - 1323-1650

ER -