INFLUENCE OF LINOLENIC FATTY-ACID (18 3W3) ADDITIVE ON EUROPEAN SHEATFISH (SILURUS-GLANIS) GROWTH BRED IN CAGES/

Influence of linolenic fatty acid on productive results of sheat fish (1+) of medium individual weight 149.0-151.1 g/piece was investigated in an experiment. The feeding experiment was conducted in 4 treatments and each treatment in 3 repetitions. Thirty fishes were stocked in ea ch of 12 cages of 1 m(3) capacity. The fish from the control group was fed by standard feed for sheat fish with 45% protein (FCF-Factory of cattle feed Valpovo). Linolenic fatty acid was added to feed with the same protein level in the first experimental group 0.5%, second 1.0% a nd third 1.5%. Linolenic fatty acid efficiency was determined on the b asis of yield feeding coefficient, SGR and PER value. The best results were achieved from the second experimental feed. Fish yield was by 12 .6% higher and feeding coefficient by 12.9 lower than in the control g roup. SGR and PER values were by 6.08% and 12.05% better than in the c ontrol group. All above mentioned indicators in all 3 experimental gro ups were highly significant in relation to the control (P < 0.01).