author(s)
Rafiq Y Kasimov, Chingiz A Mamedov, Ulduz F Hashimova and Rauf V Hajiyev

abstract
The present work explores the effect of environmental conditions on the food-procuring and protective behavioral skills and the identification of the most sensitive periods of early ontogenesis in the formation of these behavioral skills by the example of the comparative studying of the juvenile fishes of Persian (Kura) sturgeon (Acipenser persicus) grown in hatchery for 70 days and the wild juvenile fishes of the same age caught from Kura river.