AACL Bioflux, vol: 14,4 (2021)
Application of a consortium of bacterial symbionts, contained in the sea cucumbers’ stomach, as dietary adjuvant and its potential for marine cultivation
Djunaedi A., Santosa G.W., Susanto A.B., Pringgenies D., Ariyanto D.
Abstract
The sea cucumber stomach’s bacterial consortium, containing symbiont bacteria, has prospects in the field of aquaculture due to its potential antibacterial properties. This research aimed to determine the proximate content of the dietary mixture of the sea cucumber gut bacteria, the number of bacteria in the fish medium and their effect on the water quality in tilapia cultivation. A bacterial consortium from the sea cucumber stomach’s content is processed in the form of bran flour, then mixed with fish feed in different percentage ratios: treatment A, with 75% pellets and 25% bacterial consortium; treatment B, with 50% pellets and 50% bacterial consortium; treatment C, with 25% pellets and 75% bacterial consortium. The results showed that the proximate content of the consortium of bacteria in the stomach content of sea cucumbers was rich in crude fiber (27.62) and carbohydrates, non-nitrogenous organic matter and nitrogen-free extract (37.64). The medium salinity, temperature and pH during the test ranged between 8 and 10 ppt, 23.50 and 25.00°C, and 7 and 7.98, respectively. The results showed that the lower the concentration of the bacterial consortium (25%), the better the fish growth. The consortium of bacteria in the stomach content of sea cucumbers can reduce the number of bacteria (CFU mL-1) in from the fish medium. They contain phthalate compounds. In conclusion, the consortium of sea cucumber gut bacteria has the potential to be antibacterial in tilapia treatment. © 2021, BIOFLUX SRL. All rights reserved.
Keyword: Bacterial consortium; Fish; GCMS; Growth; Phthalate compounds; Proximate