ntroduction
Cage fish culture has long been practiced in
Southeast Asia (Ling 1977) and many versions of
modern modification have been developed for
intensive culture of commercially important species
in various parts of the world (Coche 1978). Most
cage culture is set up in rivers, lakes and the sea
(Beveridge 1984). In many cases, the fish are fed
with high protein diets in intensive cage culture, and
wastes derived from the feed are either directly or
indirectly released to the surrounding environment,
causing accelerated eutrophication in those waters