OPPORTUNITIES AND PROSPECTS FOR ARTIFICIAL REPRODUCTION OF FISH IN THE CONDITIONS OF THE CHEBOKSAR RESERVOIR
The Cheboksary reservoir is a highly productive reservoir with large capabilities receiving capacity for phytoplankton (silver carp), benthos (sterlet, carp), low-value and non-commercial fish species (pike). During the entire existence, the Cheboksary reservoir did not have its own compensatory object - a spawning and growing farm (NVH). The work uses a comprehensive epizootic approach, factorization, expert assessments and verification. Information was collected characterizing the artificial reproduction of fish in the Cheboksary reservoir during the existence of the reservoir. An assessment was made of the reservoir's receiving capacity in terms of the fodder base and the possibilities of stocking it with young sterlet, carp, pike and silver carp were analyzed. Analysis of data on the release of juveniles into the Cheboksary reservoir in recent years (2009-2019) shows that the actual volumes of stocking are many times lower than the potential capabilities of the reservoir in terms of receiving capacity. With the full development of the possibilities of emissions juveniles of commercially valuable fish species, productivity will increase by more than two orders of magnitude (110 times) from 0.333 to 36.8 kg / ha or from 36 to 3974 t. Currently, of fish stocking volumes is scanty - 0.3 % of the potentially possible. To realize the high potential fish-producing potential of the reservoir, it is necessary to regularly artificially release juveniles of commercially valuable fish species. Emissions of juveniles occur in small volumes and irregularly. It is necessary to build permanent compensation facilities - spawning and growing farms.