Presented paper

IMWA2019 Students work

Water Mineralization Impact On European Grayling

Zlygostev, Igor
Perm State National Research University, Russian Federation

Mineralized mine water can make a nagative impact on the environment and fauna in particular. Especially when it's about fish.

European grayling (Thymallus thymallus) is a well spread freshwater fish in Russia as well as in Perm krai. It is among the strongest when it comes to fishing (maintain it's number) and quite stable to chemical changes in water but even grayling can be harmed by poisonous water. 30 years ago people could catch hundreds of centers of grayling per year but this number decreased dramatically by now.

One of the results of this impact is dwarfish populations of European grayling (and several subspecies). These populations can be found in some regions of Russia. For instance river Kosva at the north part of Perm krai. It's contaminated 20 km downstream city Gubaha by mine waters from chemical production. There are only few articles in Russia which touches upon this problem. This problem may cause a decrease in the local ichthyofauna. Further ecological monitoring is also needed. This work may also help to improve the understanding of the occurrence of such populations in other parts of Russia.