Growth response and nutrient utilization of Heterobranchus longifilis fingerlings reread in Hapa

Fingerlings of Heterobranchus longifilis of mean body weight of 26.30+0.12g were fed with different crude protein diets of 30%, 35%, 40% and 45% respectively in hapa nets and randomly allocated into four different treatments with two replicates each with 25 fingerlings per unit. The fish fingerlings were fed at 5% body weight for 56 days. At the end of the feeding trial, growth performance and nutrient utilization were evaluated. The results revealed that fish fed with 40% CP diets had the highest Mean Weight Gain (MWG) of 30.89g, Specific Growth Rate (SGR) of 1.04%/day, and Food Conversion Ratio (FCR) of 3.75. The fingerlings fed with the 30% CP diets gave the least growth performance. It could be concluded from this study that 40% CP diet is optimal for growth of Heterobranchus longifilis fingerlings.