The facts of many years (1965–2011) of the correlation of the sex densely, moderate, sparsely rakered morphotypes of the spawning herd of the Selenginskaya population of Baikal omul were analysed. It was shown the significance of the periodical changers in quantity of some generations of the most numerous densely rakered morphotype to the forming of the sexual structure of the spawning herd. It is noted that the quota of females 1957–2000 birthyear was connected with the sea level of Lake Baikal.