Size-age characteristics and fecundity of the Baikal omul of the coastal morpho-ecological group in the Barguzin river

Spawning population of the Baikal omul inhabiting the Barguzin river is represented by three morpho-ecological groups with the predominance of omuls of the coastal morpho-ecological group. The average size and weight characteristics of the omul belonging to the coastal morpho-ecological group in 2011, 2013, 2015, 2017 show an increase in the rate of linear and weight growth. The highest average values for biological indicators were found in female omul of the coastal morpho-ecological group in 2017. The article shows the dynamic pattern of fecundity of the omul of the coastal morpho-ecological group that depends on such characteristics as weight and length of a fish’s body as well as age of a fish. The fecundity of omul is linearly dependent on the weight, body length and age of the fish. Individual absolute fecundity in omul is more dependent not on the age of the females, but on their size. Correlation coefficients of individual absolute fecundity with weight vary from 0.771 to 0.566. The correlation coefficients of individual absolute fecundity with body length are 0.823-0.574. The correlation coefficients of individual absolute fecundity with age range from 0.684 to 0.341.