Temporal genetic variation of brown trout <Emphasis Type="Italic">Salmo trutta</Emphasis> L. from Vorobiev creek (White sea) based on allozyme analysis

We performed an analysis of allozyme variation in brown trout from Vorobiev creek. Seventeen allozyme loci encoding glycerol-3-phosphate dehydrogenase (G3PDH), aspartate aminotransferase (AAT), malate dehydrogenase (MDH), lactate dehydrogenase (LDH), superoxide dismutase (SOD), and esterase D (EST-D) were studied. We found statistically significant differences in allele frequencies for the AAT-1,2*, G3PDH-2,3*, LDH-5*, and MDH-2* loci between brown 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.