Aquaculture
The physical, chemical and biological conditions of the culture environment have an influence on the health and productivity of shrimp. Exposure of shrimps to toxins like hydrogen sulphide, ammonia and carbon dioxide lead to stress and ultimately disease (Ravichandran and Jalaludin 2001). The types of wastes produced in aquaculture farms are basically similar. However, there are differences in quality and quantity of components
depending on the species cultured and the culture practices adopted. The wastes in hatcheries or aquaculture farms can be categorized as:
(1) residual food and faecal mater;
(2) metabolic by-products;
(3) residues of biocides and biostats;
(4) fertilizer derived wastes;
(5) wastes produced during moulting; and
(6) collapsing algal blooms (Sharma and Scheeno 1999).