FEATURES OF BIOLOGICAL PARAMETERS OF CHUM, RIVER REYDOVAYA (ITURUP ISLAND) IN MODERN PERIOD
The article presents the results of a biological analysis of the producers of chum of the Reydovaya river (Iturup Island). The analysis of age and gender structures is carried out. The trend of decreasing the length and weight of the chum has been revealed for several years. The dependence between the parameters “length-mass” and “length-age” of chum is found.