When knocking out I recommend using a bola on it then beating it with a club. In my personal experience for taming for about lvl 20 it usually takes 50 berries of any type. For lvl 200 I think it once took me over 100 but unclear on amount as it has been a long time.
Are you a new Ark player? A Tipp for you. He is fast... faster than you. The best way is craft Bola and Bola the Parasaur. Knock out and feed it with Berries. Dont miss nacoberries... Good you tamed it! Craft a Parasaur saddle and ride it! Good luck.