Yeast Rhodoturula glutinis as a modulator of innate immune and oxidative stress-related genes in Oreochromis niloticus cultured in a Biofloc system

The effect of live yeast Rhodoturula glutinis was evaluated on juvenile Oreochromis niloticus cultivated in a Biofloc system. Growth performance and the expression innate response relevant oxidative stress genes were after 12-week feeding trial. Three experimental treatments conventional tilapia culture (control), (BFT), with addition R. 1×106 CFU g-1 (BFT+Rg), four replicates per treatment. In all cases, commercial food supplied to organisms (32% protein 5% lipids). O. juveniles (7.02 ± 0.04 g) randomly distributed 12 tanks, each 15 animals. BFT+Rg treatment showed significant increase weight gain compared other treatments. Significant improvements found Fulton's condition factor, feed conversion rate, hepatosomatic index under conditions, BFT, No differences observed survival. directly influenced gene liver intestine. tnfa, tgfb, hsp70, gpx, significantly increased Similarly, intestinal il1b, trf, hsp70 cat patterns Based immune response, present study suggests use as strategy productivity culture.