ISSN: 2577-4050
Authors: Saad AHA, Diab AM and Khalil RH*
This study was assigned to evaluate the comparative effects of XTRACT® extracts and antibiotic supplementation on growth performance and immune status in sea bream (Sparus auratus). A total of four hundred sea bream with an average body weight of 40.0 ± 2.0 g were assigned at random to 8 treatments with 2 replicates (25 per replicate) in a randomized complete block design. Dietary treatments consisted of basal diet with no additives (group1as control) or basal diet supplemented with 100 mg /kg diet Flumequine (group 2), 200 mg/kg diet of XTRACT® extract (group 3) , 200 mg/kg diet of XTRACT® extract plus 100 mg/kg diet Flumequine (group 4), 400 mg/ kg diet of XTRACT® extract (group 5), 400 mg/kg diet XTRACT® extract plus 100 mg/kg diet Flumequine to (group 6), 200 mg/kg diet of XTRACT® extract and 400 mg/kg diet of XTRACT® extract (group 7) and 200 mg/kg diet of XTRACT® extract, 400 mg/kg diet of XTRACT® extract and 100 mg/kg diet of Flumequine (group 8). The results revealed that groups treated with XTRACT® extracts by both dose were significantly higher in weight gain % than groups treated with these extracts with Flumequine. the nonspecific immune parameters revealed that the total leukocytic count of groups treated with XTRACT® extracts were significantly higher than groups treated with these extracts with Flumequine, and these later groups were also higher than group treated with Flumequine alone. In conclusion, this study showed that the addition of XTRACT® extracts or both to the sea bream diets could be suggested as effective alternative for Flumequine as a growth promoters, also they can be used as immunostimulants for sea bream with respect that XTRACT® extract is the most potent one of them.
Keywords: Sea Bream Sparus Auratus; XTRACT® Extract; Flumequine; Growth Performance; Feed Utilization; Immune Response; Vbrio Algenolyticus
