Home – Home – Jornals – Contemporary Problems of Ecology 2005 number 2

At present, 10 species of indigenous fishes and 4 species and one ecological form (Amur goldfish) of acclimatized fish inhabit the lake Chany and its tributary rivers Chulym and Kargat. In the XX century, dominant in the numbers and ichthyomass in the lake were roach, perch and ide. In 1999-2002, the highest specific weight in catches belonged to the Amur goldfish. By the end of the century, in the lake the total catch of all the fish species decreased, the main cause of it being the decrease of the water level and as a consequence thereof the increase of water mineralization, death rate heightening during the ice regime, limitation of fattening and spawning areas. Due to these causes, the fishes of the lake have formed complicated adaptive migrations associated with reproduction, nutrition and wintering. The study of fish biology in the lake Chany is an important component of its ecological monitoring.