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Normalisation models for accounting for fat content in stable isotope measurements in salmonid muscle tissue


Abrantes, KG and Semmens, JM and Lyle, JM and Nichols, PD, Normalisation models for accounting for fat content in stable isotope measurements in salmonid muscle tissue, Marine Biology, 159, (1) pp. 57-64. ISSN 0025-3162 (2012) [Refereed Article]

Copyright Statement

Copyright 2011 Springer-Verlag

DOI: doi:10.1007/s00227-011-1789-1


Stable isotope analysis is increasingly used in ecological studies. Because lipid content influences δ13C, lipids should be removed from lipid-rich samples before δ13C analysis. To account for differences in δ13C arising from differences in lipid content, relationships between lipid content, C:N ratio and Δδ13C with lipid removal can be used to normalise lipid content to uniform levels. We investigate these relationships for salmonid muscle and evaluate the suitability of previously published normalisation equations for these fish. Salmonids with a wide range of condition (muscle lipid content = 3–35% of dry weight) were considered. There were no consistent relationships between lipid content or C:N ratio and Δδ15N. There were linear relationships between C:N ratio and lipid content (L = −16.53 + 6.27 × C:N); C:N ratio and Δδ13C (Δδ13C = −1.87 + 0.65 × C:N); and lipid content and Δδ13C (Δδ13C = 0.01 + 0.10 × L), which should be used on salmonid stable isotope studies.

Item Details

Item Type:Refereed Article
Keywords:carbon isotope, developmental biology, fat, measurement method, muscle, nitrogen isotope, numerical model, salmonid, stable isotope, salmon, salmonid
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture and fisheries stock assessment
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Wild caught fin fish (excl. tuna)
UTAS Author:Abrantes, KG (Dr Katia Dos Santos Abrantes)
UTAS Author:Semmens, JM (Professor Jayson Semmens)
UTAS Author:Lyle, JM (Associate Professor Jeremy Lyle)
ID Code:80164
Year Published:2012
Web of Science® Times Cited:17
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2012-10-24
Last Modified:2017-11-03

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