Probiotic effects (Bacillus cereus and Bacillus subtilis) on growth and physiological parameters of silver catfish (Rhamdia quelen)

• Published in: Aquaculture nutrition Vol. 27; no. 2; pp. 454 - 467
• Main Authors: Lins Rodigues, Mariana, Damasceno, Danielle Zanerato, Gomes, Ricárcio Luan Marques, Sosa, Bruno dos Santos, Moro, Evandro Bilha, Boscolo, Wilson Rogério, Bittencourt, Fábio, Signor, Altevir
• Format: Journal Article
• Language: English
• Published: Oxford Hindawi Limited 01.04.2021
• Subjects: Additives; Bacillus cereus; biotechnology; Carcasses; Diet; Fish; fish farming; Freshwater fishes; Hepatocytes; immunomodulatory; native species; non‐pathogenic bacteria; Oxidative stress; Parameters; Physical growth; Physiology; Probiotics; Rhamdia quelen; Serum; Tissue
• ISSN: 1353-5773; 1365-2095
• DOI: 10.1111/anu.13198

This study aimed at evaluating the effects of a probiotic additive in productive performance and physiological parameters for Rhamdia quelen. The fish were fed diets containing increasing levels of the additive (0.15; 0.30; 0.45; and 0.60 g/kg of feed), which consisted of a blend of Bacillus cereus and B. subtilis, both at the concentration of 4 × 1011 CFU). Productive performance parameters were higher in fish fed diets containing 0.60 g/kg of the probiotics. Both the proximate composition and carcass yield were affected when 0.30 and 0.60 g/kg of the additive was included, whilst serum biochemical parameters were higher in fish fed diets containing 0.60 g/kg of the additive. An increase in the hepatic oxidative stress activity was found when 0.30 g/kg was supplied. The development of intestinal villi was influenced by the inclusion of the additives, as well as the activity of mucous‐secreting cells in the tissue. Hepatocyte's growth was differential in fish fed diets containing 0.30 g/kg and other tissue alterations were found using 0.60 g/kg of the additive. The inclusion of 0.60 g/kg of the probiotic in diets for R. quelen enhances its growth performance and physiological status.