The effects of commercial diets supplemented with mannanoligosaccharide (MOS) and vitamin B12 on the growth and body composition of the shabbout fries (Tor grypus H. 1843)

Four hundred shabbout fries (Tor grypus L. 1758), with average initial weight of 0.95+/-0.02 g and total average length of 4.10+/-0.05 cm, were fed for a period of 90 days commercial feed with addition of mannanoligosaccharide (MOS) and vitamin B-12. The shabbouts were divided into four different groups and fed by different feeds (Control, Group A with MOS, Group B with vitamin B-12, Group C with the combination of MOS + vitamin B-12). The effects of feeding through MOS and vitamin B-12 in different proportions on growth in view of live weight and total length, survival rate, feed conversion, condition factor and protein efficacy were studied. The best growth in view of live weight of 4.51+/-0.16 g and length of 7.71+/-0.08 cm was maintained through vitamin B-12 in Group B. As a consequence, the growth parameters of the shabbout fries fed through commercial feeds with the addition of MOS and vitamin B-12 in different doses under empirical conditions showed affirmative effects on the survival rate, feed assessment, condition factor and protein efficacy.