Foods of great cormorant on lake Baikal at the chick's feeding period

Data of feeding of Great Cormorant chicks are showing which collected in different regions of Lake Baikal (Maloye More, Selenga river delta, Baklaniy Kamen island in bay Pestchanaia vicinity) in 2017-2020. Position of colony stronger effected to differences of feeding than condition of different years. In breeding season the base of food at Maloye More is fish of bottom-dwelling species of Cottidae family and Percafluviatilis, Leuciscus leuciscus and Rutilus rutilus. In Selenga delta the base of food is Perccottus glenii and the same species plus Carasius carasius. But at the time of visit of flocks of Omul Coregonus autumnalis migratorius most of cormorants change-over to feeding of this species. The widest specter of food of cormorant find at Baklanii Kamen island which can be explaining by specific position of this island. Seasonal fluctuation in feeding ration of cormorant is pointed at this island and in delta Selenga.