ALIEN FISH SPECIES OF BALKASH-ALAKOL BASIN

Abstract

The article describes alien fish species of the Balkash-Alakol basin. Including described peled, tilapia, black аmur bream, snakehead, eight- mustache loach (Lefua). Of the listed fish species, four species (peled, tilapia, black amur bream, snakehead) are found in the river Ile and the Kapshagay reservoir, one species (eight- mustache loach) was caught in the river Emel which flows into Lake Alakol. Probably, alien fish species penetrated as a result of acclimatization work from the neighboring People's Republic of China. In addition to lefua, the remaining indicated fish species have commercial significance. In Russia, as a result of an excessive catch, the number of black amur bream has decreased and, currently, it is listed in the Red Book of Russia.Invasions of foreign species are now known as the main factors in the transformation of the natural ecosystem. The problem of biological invasion of alien species into the territory of Kazakhstan is an important aspect of ensuring not only environmental, but also further food security of the country.