The current velocity in the studied areas varied from 0.45 to 1.0 m/s at a water temperature of 19.5 to 21.8 °C. Fishing for rolling larvae and juveniles of black-backed herring and sturgeon was carried out using IKS-80 ichthyoplankton nets and a 4.5-meter trawl. Five daily stations were conducted to study the dynamics of the migration of larvae and juveniles of black-backed herring and semi-anadromous fish species.
On the m/v Raskat, the survey of juveniles of migratory and semi-anadromous fish continued in residual reservoirs and in the coastal area of the river system of the western part of the Volga River delta, including the water area adjacent to the Kirovsky and Gandurinsky banks. The largest number of juvenile fish was noted in the coastal area of the river system adjacent to the Travinsky and Gandurinsky spawning areas.
The collected materials will be used to assess the conditions and efficiency of natural reproduction of migratory, semi-anadromous and river fish in 2025. The data obtained will allow a more objective approach to determining the total allowable catch and recommended catch for the future and assessing fish stocks.
Press service of VNIRO
Раскат НИС Дафния
Раскат НИС Дафния
Раскат НИС Дафния
Раскат НИС Дафния
Раскат НИС Дафния
Раскат НИС Дафния
Раскат НИС Дафния
Раскат НИС Дафния
Раскат НИС Дафния
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