Growth, feed efficacy and feed cons

Growth, feed efficacy and feed consumption of fish are normally governed by a few environmental factors (Brett 1979). In the present study physico-chemical parameters, like temperature, transparency, pH, oxygen, alkalinity, nitrate–nitrogen, nitrite–nitrogen, phosphate–phosphorus, ammonia–nitrogen and hardness of water, were maintained at suitable range as per requirement of warm water fish culture following the technique provided by Boyd (1979) , Haque et al. (1993) and Kohinoor et al. (1997). Transparency was comparatively higher in treatment T3, possibly due to the reduction of the plankton population by developing outlet system of water and use of lime (Boyd 1979; Haque et al. 1993). The amount of dissolved oxygen was declined in the morning hours in all treatments. This phenomenon may be attributed with suspension of photosynthetic activity in the night time as have been reported by