Russian Federation
Russian Federation
graduate student
Russian Federation
UDK 639.321 в морской воде
GRNTI 69.25 Аквакультура. Рыбоводство
OKSO 35.06.03 Рыбное хозяйство
BBK 472 Рыбное хозяйство
The paper examines the effectiveness of artificial reproduction of the whitefish of the Baltic Sea, which in autumn comes to spawn in the Curonian Lagoon. Reproduction of whitefish began in 2009 at the experimental fish farm of FSI “Zapbaltrybvod”. The planned volume of reproduction is 150 thousand juveniles of 1-10 g. Due to the technology improvement, the actual volume in recent years has reached 350 thousand pieces. The rate of commercial return of whitefish is unknown. As an indicator of the effectiveness of artificial reproduction, biological parameters of the whitefish spawning stock have been used, which are annually assessed based on the monitoring results. It has been established that over 10 years of operation of the fish-breeding plant, there has been a change in the size and age structure of the population towards rejuvenation, which indicates recruitment increase, possibly as a result of artificial reproduction. At the same time, an increase has been noted in the indices of the number of the spawning stock of whitefish by 10 times and the volume of commercial catch by 4 times. All these can serve as artificial reproduction effectiveness indicators. It is recommended to modify the monitoring system for whitefish during harvesting of its spawners in order to obtain a more complete picture of the state of its population and assess artificial reproduction effectiveness.
Curonian lagoon, white-fish, artificial restocking, population parameters, abundance index, length-age structure, commercial catch
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