Where did omul penetrate into Baikal from?
Some scientists believe that omul penetrated into Baikal from pre-estuary parts of the rivers, flowing into the Arctic ocean, particularly through the Yenisei and Angara. Others think that ancestors of all sig fish are pelagic sig fish of the continental waterbodies of Siberia. It is supposed that omul appeared in Baikal comparatively recently, may be in the glacial or pos-glacial periods. In Baikal it underwent considerable changes and can be considered an endemic at a sub-species level.
