Abstract

We performed an analysis of allozyme variation in brown trout from Vorobiev creek. Seventeen allozyme loci encoding glycerol�3�phosphate dehydr ogenase (G3PDH), aspartate aminotransferase (AAT), malate dehydrogenase (MDH), lactate dehydrogenase (LDH), superoxide dismutase (SOD), and esterase D (ESTD) were studied. We found statistically significan t differences in allele frequencies for the AAT�1,2*, G3PDH�2,3*, LDH�5*, and MDH�2* loci between br own trout samples collected in 1981-1982 and/or 1992-1995. We suggest that temporal changes of allele frequencies in brown trout from Vorobiev Creek are associated with gene drift.

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