Rearing practices

1 Historical Perspective Aquaculture has a tradition of about 4 000 years. It began in China, possibly due rearing practices the desires of an emperor to have a constant supply of fish.

Freshwater: health risks to farm workers from waterborne diseases. As extensive cage and pen Systems above. Other – raceways, silos, tanks, etc. Source: Modified from Pullin, 1989 Chinese who emigrated to other Southeast Asian countries probably carried the knowledge with them and inspired the local people to take up fish farming.

Water change is effected through tidal means, i. Over the years, the practice has spread to almost all parts of the world and is used for a wide variety of culture organisms in freshwater, brackishwater, and marine environments. Running water fish culture involves growing the fingerlings to marketable size in earthen ponds using water from rivers, irrigation canals, or plain rain water. The system approximates intensive culture in that it involves the application of rapid water changes and the heavy stocking of the cultured species. The continuously flowing water is advantageous for fish culture as it supplies abundant dissolved oxygen and flushes away waste products and unconsumed feeds. 1:1 when dike height is less than 4.