The roles and differences of Bacillus licheniformis and Bacillus subtilis in aqu

The roles and differences of Bacillus licheniformis and Bacillus subtilis in aquaculture

1、 Bacillus licheniformis

    Bacillus licheniformis is a probiotic commonly used for improving the digestive system and preventing diseases in aquaculture. They can produce various beneficial substances such as enzymes, peptides, cytokines, and trace elements, which help improve the immunity of aquatic animals, promote digestion and absorption, alleviate and inhibit the growth of intestinal pathogenic microorganisms. Meanwhile, Bacillus licheniformis can also decompose and transform some harmful substances in water into useful components to achieve environmental purification.

2、 Bacillus subtilis

    Bacillus subtilis is a biofilm forming bacterium commonly used for water purification and ecological balance regulation in aquaculture. Bacillus subtilis can form a substance called "biofilm" in water quality, which can adsorb microorganisms, nutrients and other substances in water with good adsorption performance, thus improving the quality of aquaculture water. In addition, Bacillus subtilis can decompose and oxidize organic matter in water, making the water fresher and beneficial for the growth and development of fish fry. At the same time, Bacillus subtilis can selectively inhibit harmful microorganisms in water, increase the number of beneficial microorganisms in the water, and achieve ecological balance regulation.

3、 The difference between Bacillus licheniformis and Bacillus subtilis

1. Different functions: Bacillus licheniformis is mainly used to improve the immunity and digestive health of aquatic animals, while Bacillus subtilis is mainly used for water purification and ecological balance regulation.

2. Different morphologies: Bacillus licheniformis is rod-shaped or spherical, while Bacillus subtilis is filamentous.

3. Different distribution ranges: Bacillus licheniformis mainly exists in the digestive system of aquatic animals, while Bacillus subtilis is widely present in natural water bodies and aquaculture environments.

【 Conclusion 】

    Bacillus licheniformis and Bacillus subtilis play different roles in aquaculture. The former can help improve the immune system and maintain digestive health of aquatic animals, while the latter plays a role in water purification and ecological balance regulation. For different breeding environments and needs, these two types of bacteria can be selectively selected and used to achieve better breeding results.