Growth performance, body chemical compsitions and digestive enzymes in grey mullet, Mugil cephalus Linnaeus 1758, fed with different levels of Saccharomyces cerevisiae yeast
2020
Akbary, P.
Probiotics, as a live microbial dietary supplement, play an important role in the growth and activity of the host digestive enzymes by balancing the gut microbial population.The present study was conducted with 4 treatments and 3 replications including diets containing 1×106, 3×106 and 5 ×106 (cell/ g feed) and control (basal diet without yeast) to evaluate the effect of different levels of dietary supplementation of Saccharomyces cerevisiae on growth performance, body biochemical composition and digestive enzymes activities of grey mullet, Mugil cephalus. The fish (5.56±0.65 g) were randomly allocated into 12 fiberglass tanks at a density of 20 individuals per tank with three replicates for each treatment and fed with the experimental diets for 60 days. The results indicated that the diet at 5×106 yeast cells/ g( significantly improved weight gain (240.36±13.57%), final weight (919.28±1.55), protein efficiency (10.01± 0.56%) and survival (94.40±13.57%) compared to the control and treatment 2 (p<0.05). Also, the highest activity of amylase (199.50±17.70 U/mg protein) and protease (362.50±13.52 U/mg protein) were observed in 5×106 yeast cells/ g diet (P<0.05). This study shows that the use of S. cerevisiae 3×106 and 5 ×106 yeast cell/ g feed can have positive effects on growth performance, feed utilization, body chemical composition and digestive enzymes activities of M. cephalus.
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