Biological characteristics of the north Baikal population of the Baikal omul

The feeding shoal of the Baikal omul on Northern Baikal is represented by a coastal morpho-ecological group. Based on the materials, collected during June-August 2020, we have studied the age and size structure, linear-weighted growth, sex ratio and the state of sexual maturity of the omul population found in the coastal morpho-ecological group. The coastal omul shows a high linear growth rate before the beginning of mass maturation (age 1+ 4+ ). After puberty (age 5+ 11+) the average annual growth in length decreases, while the growth in weight increases. The sex ratio is close to 1,1:1. Mass maturation begins with advancing 5+ 6+ years.