ACTIVITY OF DIGESTIVE ENZYMES IN SIBERIAN STURGEON JUVENILES (Acipenser baeri Brandt) – A PRELIMINARY STUDY

• Main Authors: Ryszard Kolman, Halina Kolman, Faculty Of Biology Warmia
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Key words; Acipenser baeri; FRY FEEDING; BIOCHEMICAL STUDY; DIGESTIVE ENZYMES; ONTOGENESIS; Siberian sturgeon
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.577.7116; http://www.infish.com.pl/wydawnictwo/Archives/Fasc/work_pdf/Vol7Fasc1/Vol7Fasc1 - w18.pdf

ABSTRACT. The study was carried out on Siberian sturgeon fry and fingerlings at the age of 9-44 days post hatching (dph). Activities of proteolytic, lipolytic and amylolytic enzymes, and dicaccharidases were measured in the digestive tract extract. Only alkaline proteases were observed in 9 dph fish, and no lipolytic or amylolytic activity were found. After the first week of exogenous feeding (16 dph), high lypolitic and maltase activities were noted, as well as slight activity of acidic proteases, but no pepsin. Pepsin activity was observed for the first time on 44 dph. Amylolytic activity increased gradually bet-ween 3 and 6 weeks post hatching. Activity of dicaccharidases: maltase and trehalase reached the maxi-mum on 30 dph. No lactase or saccharase were observed.