In late February, the first time in decades, documented fish kills in the ducts and kuryah Tom River in the territories of Novokuznetsk and Krapivinskoye areas — George duct Nicholas Kurian, Silver duct Lachinovskaya Kurian. Underwater inhabitants suffocate without oxygen.
-Zamora exposed to one degree or another, all medium-sized reservoirs without flow. Oxygen deficiency usually occurs in late February — early March. At this time, almost all the dissolved oxygen in the water is absorbed by animals and plants, and the supply of fresh oxygen is limited to a thick layer of ice covering the entire body of water, — reported in the Kemerovo division of control, supervision and protection of aquatic resources and their habitat.
In the Kuzbass Zamora year most prone floodplain lakes in the flood basins Kyi, Yaya, Yin, the death of fish in which there in November and December. Less likely to have fish in large water bodies such as Lake Big Berchikul. Currently, the lake was formed predzamornaya situation connected with the fall of the oxygen concentration of 3-4 mg / L, but before the death of the fish case has not yet reached.
-Most sensitive to oxygen deficiency perch, ruffe, perch, pike, roach, ide, bream. For them, the oxygen threshold is 4 mg / l, if the number is reduced to 1-2 mg / L, the fish dies. Least sensitive to the oxygen content — Roth, tench and crucian carp, — the department.
Photo: Kemerovo Department of control, supervision and protection of aquatic resources and habitat