Effects of prebiotics on growth and survival of silver catfish (Rhamdia quelen) juveniles

Résumé 0

"Recently, proof of the advantages of employing beneficial microorganisms or organic additives as growth promoters, replacing chemoterapeutic and antimicrobial agents, has been obtained. The aim of this work was to evaluate the effect of two experimental diets, one supplemented by a flavonoid-based metabolic antioxidant (FLAVOXIN®) and the other supplemented by a combination of organic acids and yeast wall (UNIWALL MOS 50®) on growth and survival parameters of Rhamdia quelen juveniles, in contrast to a control diet. The experiment consisted of three dietary treatments: a control consisting of a commercial diet with 280g of proteins/kg and 120g of lipids/kg, the commercial diet supplemented with FLAVOXIN® (FL) and commercial diet supplemented with UNIWALL MOS® (MOS), both products added on a 2g/kg basis. Nine batches consisting of 42 specimens distributed in outdoor cement tanks of 16m3 were assigned according to a 3×3 Latin square design. The experiment lasted a total of 60 days. Weight gain was determined in all treatments, without statistical differences between them (p>0.05). The survival rate was 89% for the control diet and 97 and 95% for FL and MOS, respectively. Both FL and MOS treatments resulted superior and statistically different to the control diet (p