As a result of this research, nine water bodies were surveyed, including three water bodies as part of aquatic bioresource monitoring, and six water bodies as part of reconnaissance studies of potentially commercial water bodies.
During data collection, environmental parameters were measured, including snow cover thickness, ice thickness, water temperature, salinity, dissolved oxygen, and pH. According to observations, snow cover thickness on the lakes ranged from 10 to 40 cm. Ice thickness ranged from 60 to 90 cm.
At some lakes, a deficiency of dissolved oxygen was observed (thermooximeter readings ranged from 0.05 to 0.2 mg/dm³).
Sampling to assess the distribution of invertebrates in the water column was carried out using a Juday plankton net, drawn from the bottom to the surface. Sediment samples were collected using a Zabolotsky bottom grab.
Sampling was performed at five bodies of water using a mormysh trough to assess the distribution of gammarids near the underside of the ice. At four water bodies (lakes Gorkoe, Bogatskoe, Markovskoe, and Maloe Gorkoe), gammarids were absent at the time of survey, using various fishing gear.
Based on the collected material, data on the abundance, biomass, and distribution of aquatic invertebrates will be analyzed.
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