Biology of whitefish-ludoga inhabiting southwestern part of Onega lake

Research results of 572 samples of the whitefish-ludoga of the southwestern part of Onega Lake (Sheltozero - Brusno) are presented. It was revealed that the whitefish-ludoga of this part of Lake Onega is an ecological form of the ordinary whitefish and belongs to a group of “malotychinkovyh” whitefish. The sex ratio of the studied species was close to 1:1. Dimensionally - weight indexes of the whitefish-ludoga species ranged from 29,5 to 55,0 cm and from 284,2 to 1798,5 g. The absolute weight increased by age from 127,9 to 183,7 g. The maximum intensity of the body weight accumulation was noted at the age of 3 +...6 + ( 23,5-24,4 %) years, and the highest rate of the species’ linear growth was noted at the age of 4 +.6 + (8,0-9,7 %) years. At the age of 3 +.6+ years old the body weight of the studied species accumulated more intensively than the linear growth. The whitefish-ludoga can be used for cultivation in cage farms and in artificially created recirculation systems.