Aquaculture is the farming of fish. This can be done essentially in 3 different kinds of systems. Intensive, Semi Intensive and Extensive. A brief explanation of each is given below.
Extensive Aquaculture follows the modest and basic culture of aquatic organisms in a natural water body. The farmer uses none or very little supplementary feeding practices, and does not use any supporting systems like aerators or filter systems etc. The culture density and growth rates are uncontrolled. Capex is low.
Semi-intensive Aquaculture also depends largely on natural food but where the naturally present food levels are increased through the use of supplementary feed. Additional supporting systems such as aerators and filtering systems are used, but densities are still kept at lower levels than those typical for intensive aquaculture production.
Intensive Aquaculture is carried out under the condition that the growth and production of aquatic species are kept under specific control and the growth of aquatic species entirely depends on the aquafeeds. The main form of intensive aquaculture today can be seen in RAS. Recirculating Aquaculture Systems. Capex is high but so is the ability to control all inputs and outputs when designed correctly.