ABSTRACT
Intensive aquaculture is regulated by factors linked to sites. The availability of a supply of oxygen-rich water with no industrial or agricultural pollution is critical to the success of the operation. Intensive fish culture, whether of marine or fresh-water fish, is limited by two basic problems: the maintenance of adequate environmental conditions, associated with the level of dissolved oxygen and water quality. And the provision of a high quality diet which is given in predetermined quantities at precise intervals. The main difference between the nursery and the ongrowing stages centres on the sensitivity and fragility of the larvae to biological and abiotic aspects of the environment. The tanks used for intensive ongrowing are elongated rectangles known as raceways. Water enters at one extremity and leaves at the other through a grid and then an overflow system. From the ecological perspective, intensive fish culture is only a means of transforming one type of protein into another and is to involve pollution.
