DEVELOPMENT OF LEAST-COST FISH FEED FOR RAINBOW TROUT FROM INDIGENOUS INGREDIENTS AT JUGLOTE, GILGIT

Forty four weeks feeding trial with four levels of dietary fish meal was conducted to investigate the least cost fish feed for the growth of trout, Oncorhynchus mykiss. Four types of feeds containing 30, 35, 40 and 45% fish meal with 20, 15, 10 and 5% soybean meal, respectively were formulated and fed to fish at the rate of 1.5-2%/ of their body weight twice a day. Survival rate was maximum by fish fed diet I (D1) than all other treatments. Growth of fish fed the diets containing 30% lipid increased having low cost is maximum than those of other diets. Production cost (Rs.)/kg was also minimum for diet I (D1, 120.90) followed by diet II (D2, 139.36), diet IV (D4, 139.50) and diet III (D3, 145.20). It was concluded that the diet with 35% crude protein and having 30% fish meal and 20% soybean meal is suitable for the better growth and production of rainbow trout yearlings.