Retrospective analysis and current state of walleye stocks and fishery on the Dagestan coast of the Caspian Sea

Abstract

The dynamics of commercial catches, stocks and forecast values of walleye catch on the Dagestan coast of the Caspian Sea with the analysis of factors affecting the state of stocks for a long-term period is presented. Data on seasonal distribution, migration, reproduction, as well as age and size-weight composition of walleye populations in the study area are presented. The forecast of prospects for the use of walleye by fishing is given on the basis of the analysis of commercial stocks for a number of years of observations, taking into account the coefficient of total mortality, the influence of fishing load, the values of the commercial population replenishment with first-matured fish.