About the reasons for the decrease in the spawning stock of black-backed herring in Volga River

Abstract

The long-term data of the spawning stock of passing herring are analyzed in accordance with its commercial catches. The current state of the age structure of producers with a division into replenishment and remainder is considered. The main reasons for the decline in the spawning stock are identified and recommendations are given for commercial exploitation aimed at preserving and restoring the population of black-backed herring.