Effect of protein levels in feed on growth and survival rate of juvenile giant trevally (Caranx ignobilis)

Abstract

This study was conducted to determine the impact of protein levels in pellet feed on the growth rate, survival rate, and protein utilization efficiency of juvenile giant trevally (Caranx ignobilis). The experimental fish were fed with different protein levels in the pellet feed (45; 50; 55; 60%) and one control group was fed with trash fish. The experiment lasted for 45 days, with three replicates in 15 cement tanks, each with a volume of 4.0 m³ and stocked with 15 fish per m³ (fish at the size of 5.0 cm/fish). The results identified the appropriate protein requirement for growth of juvenile giant trevally (5.0 - 10.0 cm/fish) in the range of 45 - 55%. The fish achieved optimal growth with 50% protein level in feed.