One of the most unique features of clarid catfish is
their airbreathing ability, which enable them to live
in extremely high population density and give great
yields in various culture systems. The present cage
culture experiment produced 71 kg/m3 in 4 months,
equivalent to approximately 30 m2 of the traditional
pond culture in Thailand, i.e., 80 tonneslhdyr of
C. batracus (Panayotou et al., 1982). Still a greater
yield of C. gariepinus at 400 kg/m"61 days has been
achieved in recirculated flow-through tank culture
in the Netherlands (Huisman and Richter, 1987).
In the present cage culture experiment, there was
no significant difference (p>0.05) in catfish growth
between the two densities, which was perhaps due
to their air-breathing ability to survive in low DO