Long-term effects of three compound probiotics on water quality, growth performances, microbiota distributions and resistance to Aeromonas veronii in crucian carp Carassius auratus gibelio. Issue 120 (January 2022)

• Record Type: Journal Article
• Authors: Zhang, Yingying; Ji, Tongwei; Jiang, Yinan; Zheng, Chen; Yang, Hui; Liu, Qiuning
• Is Part Of: Fish & shellfish immunology. Issue 120(2022)
• Page Start: 233
• Page End: 241
• Publication Date: 2022-01
• Subjects: Probiotics -- Crucian carp -- Antioxidase activity -- Aeromonas veronii -- 16S sequencing; Fishes -- Immunology -- Periodicals; Shellfish -- Immunology -- Periodicals; Poissons -- Immunologie -- Périodiques; Crustacés -- Immunologie -- Périodiques; 571.9617
• DOI: 10.1016/j.fsi.2021.11.036
• Languages: English
• ISSNs: 1050-4648

Abstract

Abstract: Probiotics could promote the healthy growth of aquatic animals and have been widely used in aquaculture. However, the influence of high concentration compound probiotics on the aquatic animals has not been reported. In the present study, a compound probiotics was used in high-density culture of crucian carps under the condition of micro-water exchange. During nearly 7-weeks feeding experiment, the aquaculture water quality, growth performances, disease resistance and microbiota distributions of crucian carps were tested. Under the high concentrations of compound probiotics, the content of total ammonia nitrogen and nitrite were finally in a state of dynamic equilibrium. The body length and weight of crucian carps in the experimental group (E) was significantly higher than that in the recirculating group (R). The antioxidant enzymes in the intestines and gills of the E group including SOD, CAT, GSH and MDA, were significantly higher than those in R group. The mortality of crucian carps in E group was significantly lower after the immersion infection of Aeromonas veronii . The addition of compound probiotics significantly increased the number of microorganisms detected in the intestines and gills of crucian carps in E group. The bacteria including Firmicutes, Planctomycetes, Verrucomicrobiota at the phylum level in E group were higher than those in R group. At the genus level, these bacteria ( Pirellula, Roseimicrobium, Malikia ) were not only higher in E group water, but also significantly higher in the intestines and gills than R group. The results of present study systematically analyzed the impact of high-concentration probiotics on crucian carps breeding, and speculated genus Pirellula, Roseimicrobium, Malikia may be used as aquatic probiotics. The present study will provide a new idea for the green and sustainable development of aquaculture. Highlights: The compound probiotics could degrade total ammonia nitrogen and nitrite in aquaculture water. The compound probiotics could improve the growth and antioxidant enzymes activities of crucian carps. Under the protection of compound probiotics, the mortality of crucian carps reduced after A. veronii infections. The microbiota distributions of gill, intestine and aquaculture water could by significantly changed by probiotics. Pirellula, Roseimicrobium, Malikia may be used as probiotics in aquaculture.