CULTURE POTENTIALS OF CLIMBING PERCH, THAI KOI, Anabas testudineus (BLOCH) UNDER DIFFERENT STOCKING DENSITIES IN NORTHERN REGIONS OF BANGLADESH E-ma (original) (raw)

An experiment was conducted in nine experimental ponds (each size 0.006 ha) to assess growth and production potentials of Climbing perch, Thai koi (Anabas testudineus) for the period of five months from July 23 to December 21, 2011. Three stocking densities were tested with three replications for each, viz., 50,000/ha as Treatment-1, 75,000/ha as Treatment-2 and 1, 00,000/ha as Treatment-3. Fish in all the experimental ponds were supplemented with commercial floating pellet feed (35% crude protein). The physico-chemical parameters and plankton populations of pond water were within the suitable range for fish culture. Final weight and survival of Thai koi in Treatment-1 were significantly higher (P<0.05) than those in Treatment-2 and Treatment-3. Food conversion rate was significantly lowest in Treatment-1followed by Treatment-2 and the highest in Treatment-3. The production obtained from treatments Treatment-1, Treatment-2 and Treatment-3 were 4800.40, 5279.61 and 5582.23 kg/ha, respectively but showed no significant (P>0.05) difference from each other. However, the highest net benefit was derived in Treatment-1(BDT 4,43,458/ha), where the stocking density was 50,000/ha. The study reveals that less number of stocking density gives higher growth, survival, final production and net benefit.