What defines a biofloc system in aquaculture?

A biofloc system in aquaculture is defined primarily by its ability to promote the growth of microbial flocs, which serve as a source of food for aquatic organisms. This system relies on the cultivation of beneficial micro-organisms, including bacteria and algae, that convert excess nutrients, such as ammonia and organic waste produced by the aquatic animals, into microbial biomass. This biomass can then be consumed by fish and shrimp, providing a natural food source that can enhance growth rates, improve feed conversion, and promote overall health of the animals in the system.

The major advantages of utilizing a biofloc system include reducing the need for external feeds, improving water quality by bioconverting waste products, and creating a self-sustaining ecosystem that can lead to lower production costs and improved sustainability in aquaculture practices. This ecological approach supports the idea of using natural processes to enhance aquaculture productivity, ultimately making it an innovative and environmentally friendly method.

The other options do not accurately capture the essence of a biofloc system. Option A refers to hydroponics, which is unrelated, while option C discusses chemical filtration, which is not the primary function of a biofloc system. Option D describes selective breeding or isolation practices, which diverges from the principles of