Polyunsaturated Fatty Acid Content in the Muscles of Alien Fish Species of the Rybinsk Reservoir //d ISSN 0032-9452, This article is an open access publicationстатья
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Аннотация:The biochemical composition of the muscles of two fish species, European smelt Osmerus eperlanus
and the Common (Caspian) kilka Clupeonella cultriventris, that were successively invaded and naturalized
in the Rybinsk Reservoir in the second half of the 20th century, differs significantly in the fatty acid content.
The sum content (mg/g) of eicosapentaenoic (20:5n-3) and docosahexaenoic (22:6n-3) polyunsaturated
fatty acids in the muscle tissue of the kilka is almost four times higher than that in European smelt. Given that
smelt and the kilka are similar in their ecological and morphological characteristics and do not differ significantly
in the composition of their diet in the Rybinsk Reservoir, it is obvious that the observed differences primarily
result from the phylogenetic aspect. The obtained data on the composition of the fatty acids of the
invaders show that the replacement of one alien species with another (European smelt with the kilka) significantly
changed the quality of production of an important link in the trophic web of the reservoir.