Hydrochemical characteristics of the rivers in Jewish autonomous region and the content of heavy metals in the gills of the minnow (Phoxinus)

The article presents the results of hydrochemical analysis of water from some small rivers in Jewish Autonomous region. The results of the studies showed that the accumulation of heavy metals (Fe, Zn, Pb) in the gills of the Lagovsky minnow (Phoxinus Lagowskii) occurs in the lower reaches of small rivers of the study area, which is directly related to the deterioration of hydrochemical parameters of small rivers exposed to the influence of drainage reclamation.