Journal
JOURNAL OF FISH BIOLOGY
Volume 103, Issue 1, Pages 179-182Publisher
WILEY
DOI: 10.1111/jfb.15394
Keywords
Anguillid; chemical preservation effects; critically endangered; stable isotope analysis; trophic ecology
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The effects of ethanol preservation on the C-13 and N-15 values of European eel tissues were studied. Preservation enriched the C-13 values of fin and mucus, but not dorsal muscle. This enrichment happened within the first 15 days and was independent of eel mass. The effects on N-15 values were negligible. These tissue-specific isotopic shifts should be taken into account when using ethanol-preserved eel samples.
The temporal effects of ethanol preservation on the delta C-13 and delta N-15 values of tissues excised from European eel Anguilla anguilla were assessed. Preservation significantly enriched C-13 values of fin and mucus but not dorsal muscle. The C-13 enrichment occurred in the initial 15 days of preservation and was independent of initial eel mass. Tissue preservation effects on delta N-15 values were negligible. These tissue-specific isotopic shifts should be considered when ethanol-preserved eel samples are used.
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