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Aquatic Biology

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AB 13:1-10 (2011)  -  DOI:

Fatty acid profiles in different fish species in Lake Baikal

O. Grahl-Nielsen1,*, E. Averina2, N. Pronin3, L. Radnaeva2,4, R. Käkelä5

1Department of Chemistry, University of Bergen, 5007 Bergen, Norway
2Baikal Institute of Natural Management SB RAS, 630033 Ulan-Ude, Russia
3Institute of General and Experimental Biology SB RAS, 630033 Ulan-Ude, Russia
4Buryat State University, 630000 Ulan-Ude, Russia
5Department of Biosciences, University of Helsinki, PO Box 65, 00014 Helsinki, Finland

ABSTRACT: The fatty acid (FA) composition in the heart tissue and white muscle of 13 species/ecoforms of Lake Baikal fish was determined. All the FAs usually found in freshwater or marine fish were detected in both tissues of all species studied. White muscle contained lower levels of saturated and monounsaturatedÊFAs (SAFAs and MUFAs), and higher levels of poly­unsaturated FAs (PUFAs) than heart tissue. The n3/n6 PUFA ratio ranged between 1.3 and 3.2 in heart tissue and 1.4 and 6.6 in white muscle, typical for freshwater fish. The most prominent n3 PUFAs, 20:5n3 and 22:6n3, occurred at levels comparable to those found in corresponding species in other freshwater lakes and rivers and also in marine fish. The FA compositions were species specific, following the taxonomic distinction between the species. Apparently, dietary FAs are modified significantly through the metabolism of the fish to produce the species-specific FA composition necessary for the structural lipids of heart tissue and white muscle.

KEY WORDS: Heart · White muscle · Thirteen species/ecoforms · Fatty acid composition · Taxonomy

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Cite this article as: Grahl-Nielsen O, Averina E, Pronin N, Radnaeva L, Käkelä R (2011) Fatty acid profiles in different fish species in Lake Baikal. Aquat Biol 13:1-10.

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