Current state of zooplankton of the upper course Indigirka river

The article presents pioneer data on the current state of zooplankton in the watercourses of the upper reaches of the Indigirka River, one of the largest fishing rivers in the northeast of Russia. The dependence of the quantitative indices of the zooplankton of the northern rivers on the hydrological characteristics and on the level of the technogenic impact has been revealed.