Scientists examined a section of the river about 350 kilometers long. Data were collected on the species composition of fish, their distribution and food supply (samples of phytoplankton, zooplankton and zoobenthos were collected), on the natural spawning grounds of the main commercial fish species, and hydrological observations were conducted (current speed, water temperature).
A characteristic feature of the river is that it retains the characteristics of a mountain river up to the city of Kropotkin. Here, a fast current, shallow depths are observed, and the bottom sediments are mainly pebbles. Downstream, the flow speed decreases, and the structure of the bottom sediments changes to sand and pebbles. Near the city of Ust-Labinsk, the current slows down to 0.5 m/s, the bottom is sandy and silty. Depending on the speed of the current, the depth of the reservoir and the state of the bottom sediments, the species composition of aquatic organisms varies.
To study the ichthyofauna, scientists used a fry drag, fixed and drift nets. Bleak predominated in the fry drag catches, and depending on the section of the river, gudgeon, sand goby, yearlings of bream, roach, and Kuban barbel were also noted. In each catch, specialists determined the species composition, total weight and percentage ratio of fish of various species, size and weight composition, sex, age, and also took samples for a full biological analysis.
Viktor Petrashov, head of the research group, emphasized that comprehensive studies of aquatic bioresources and their habitats in the section of the river above the Krasnodar Reservoir have not been conducted since the 1980s and were resumed by VNIRO scientists in the fall of 2024. Modern studies of the reservoir will help determine its fishery potential, assess the state of the Kuban River ecosystem and develop measures to preserve its biological diversity.
VNIRO Press Service
в среднем течении реки Кубани
в среднем течении реки Кубани
в среднем течении реки Кубани
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