The Effects of Ethanol Preservation on Fish Fin Stable Isotopes: Does Variation in C:N Ratio and Body Size Matter?

Autor: Douglas G. Burrows, Holly J. Coe, Carmella Vizza, Beth L. Sanderson
Rok vydání: 2013
Předmět:
Zdroj: Transactions of the American Fisheries Society. 142:1469-1476
ISSN: 1548-8659
0002-8487
Popis: Although chemical preservation of stable isotope samples has been studied in a variety of species and tissue types, the effects of ethanol preservation on fish fin tissue have not been examined. Using caudal fin samples from juvenile Chinook Salmon Oncorhynchus tshawytscha and Rainbow Trout O. mykiss or steelhead (the anadromous form of Rainbow Trout), we investigated how storage time (2, 4, and 6 months), fin composition (C:N ratio), and fish body size (50–130 mm FL) influence preservation-induced changes in δ13C and δ15N. In both species, we found that treatment fins (frozen and later preserved in ethanol) exhibited higher δ13C than did paired reference fins (frozen). The changes in δ15N, however, were smaller in magnitude and less consistent. Preservation-induced increases in fin δ13C, but not δ15N, were significantly correlated with the change in C:N ratio (treatment–reference) in both species. In addition, these increases in δ13C were more highly correlated with body size in O. mykiss than i...
Databáze: OpenAIRE
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