Influence of wheat and rice bran fermentation on water quality, growth performance, and health status of Common carp (Cyprinus carpio L.) juveniles in a biofloc-based system

• Published in: Aquaculture 2022-06, Vol.555, p.738168, Article 738168
• Main Authors: Abiri, Shariya Akhavan, Chitsaz, Hossein, Najdegerami, Ebrahim H., Akrami, Reza, Jalali, Ali Shalizar
• Format: Article
• Language: English
• Subjects: Bacillus; Cereals; Fermentation; Oxidative stress; Probiotics; Wastewater treatment
• ISSN: 0044-8486; 1873-5622
• DOI: 10.1016/j.aquaculture.2022.738168

The present study was aimed to compare the effect of wheat and rice bran fermented with probiotics (Bacillus coagulants, Bacillus subtilis) on liver and intestine histology of Common carp. Additionally, its effect on water quality, growth performance, hemato-serological indices and oxidative stress in biofloc based system for Common carp juveniles was investigated. To compare fermented (FWB + BFT: fermented wheat bran, FRB+BFT: fermented rice bran) and non-fermented (WB + BFT: wheat bran, RB + BFT: rice bran) treatments, 375 healthy juveniles (25.1 ± 1.6 g) were randomly distributed in 12 tanks (70 L). In the fermented treatments, wheat and rice bran were pre-fermented for 24 h, and then added to the culture tanks and in control. No carbon source was added while 30% of the water was changed on a daily basis. After 60 days, the results revealed that total ammonia nitrogen, pH, biofloc floc volume, and dissolved oxygen decreased in the fermented sources compared with those of the non-fermented treatments. Moreover, the results indicated that fermentation improved growth performances, and the highest significant weight gain and protein efficiency ratio, along with the lowest feed conversion ratio and feed intake belonged to FWB + BFT, which was different with non-fermented brans (P