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

机译：鲑鱼肌肉组织中稳定同位素测量中脂肪含量的归一化模型

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摘要

Stable isotope analysis is increasingly used in ecological studies. Because lipid content influences δ~(13)C, lipids should be removed from lipid-rich samples before δ~(13)C analysis. To account for differences in δ~(13)C arising from differences in lipid content, relationships between lipid content, C:N ratio and △δ~(13)C 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 △δ~(15)N. There were linear relationships between C:N ratio and lipid content (L = -16.53 + 6.27 x C:N); C:N ratio and △δ~(13)C (△δ~(13)C = -1.87 + 0.65 x C:N); and lipid content and △δ~(13)C (△δ~(13)C = 0.01 + 0.10 x L), which should be used on salmonid stable isotope studies.
机译：稳定同位素分析越来越多地用于生态学研究。由于脂质含量会影响δ〜（13）C，因此应在δ〜（13）C分析之前从富含脂质的样品中去除脂质。为了解决由脂质含量的差异引起的δ〜（13）C的差异，可以使用脂质含量，C：N比和△δ〜（13）C与脂质去除之间的关系将脂质含量标准化为均匀水平。我们调查了鲑鱼肌肉的这些关系，并评估了这些鱼先前发布的归一化方程的适用性。鲑鱼的病情范围很广（肌肉脂质含量=干重的3-35％）。脂质含量或C：N比与△δ〜（15）N之间无一致关系。 C：N比与脂质含量之间存在线性关系（L = -16.53 + 6.27 x C：N）； C：N比和△δ〜（13）C（△δ〜（13）C = -1.87 + 0.65 x C：N）;脂质含量和△δ〜（13）C（△δ〜（13）C = 0.01 + 0.10 x L），应用于鲑鱼稳定同位素研究。

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    《Marine biology》 |2012年第1期|p.57-64|共8页
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    Katya G. Abrantes; Jayson M. Semmens; Jeremy M. Lyle; Peter D. Nichols;

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    Institute for Marine and Antarctic Studies, Fisheries, Aquaculture and Coasts Centre, University of Tasmania, GPO Box 252-49, Hobart, TAS 7001, Australia,Department of Earth and Environmental Sciences, Katholieke Universiteit Leuven, Kasteelpark Arenberg 20, 3001 Heverlee, Belgium;

    Institute for Marine and Antarctic Studies, Fisheries, Aquaculture and Coasts Centre, University of Tasmania, GPO Box 252-49, Hobart, TAS 7001, Australia;

    Institute for Marine and Antarctic Studies, Fisheries, Aquaculture and Coasts Centre, University of Tasmania, GPO Box 252-49, Hobart, TAS 7001, Australia;

    CSIRO Marine and Atmospheric Research, Wealth from Oceans Flagship, GPO Box 1538, Hobart, TAS 7001, Australia;

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