Lipid Composition in Muscle and Liver of Sympatric Coregonid Fishes from Lake Baikal (Coregonus spp.) under Common Garden Experiment
O. B. VASIL’YEVA1, L. V. SUKHANOVA2, O. Yu. GLYZINA2, Yu. P. SAPOZHNIKOVA2, V. M. YAKHNENKO2, P. O. RIPATTI1, M. A. NAZAROVA3, N. N. NEMOVA1
1Institute of Biology, Karelian Scientific Centre, RAS, 185910, Petrozavodsk, Pushkinskaya str., 11
2Limnological Institute, SB RAS, 664033, Irkutsk, Ulan-Batorskaya str., 3
3Vologda State University, 160035, Vologda, Leninа str., 15
Keywords: симпатрические сиговые рыбы, оз. Байкал, липиды, жирные кислоты, sympatric coregonid fishes, Lake Baikal, liрids, fatty acids
Abstract
The content of total liрids, total phospholiрids and fatty acids of total liрids in muscles and liver of juvelile Lake Baikal sympatric coregonid fishes were analysed for the first time under common garden experiment. Baikal omul, Coregonus migratorius Georgi, is an active migrant of the pelagic zones of the lake. Baikal (lacustrine) whitefish, C. baicalensis Dybowski, is a colonizer of the bottom habitats, which are relevant to the pelagic zones of the littoral and underwater slope. Structural liрids (phospholipids and cholesterol) dominated in total liрids of the tissues of all fish under study. Spare liрids significantly prevailed in omul muscles compared to whitefish. The highest variability of fatty acid composition was reported in muscles of coregonid fishes. Statistically significant differences were revealed in the content of the 3 polyunsaturated fatty acids in muscles of lacustrine whitefish and omul. Associations of liрid compositions revealed in tissues of the whitefishes under the study with their respective ecotypes have been discussed.
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