The study of the current state of spawning areas of river Perca fluviatilis, Linnaeus, 1758 of the Ust-Ilim Re servoir using diving equipment
Reconnaissance examination of spawning areas of river perch on the control and under the anthropogenic influenced areas of the Ust-Ilim Reservoir allowed to make a preliminary assessment of the qualitative diversity of spawning substrates. The frequency of masonry depends on the depth and nature of the spawning substrate.