Growth performance and survival rate of silver pompano (Trachynotus blochii) seed after additional amino acid lysine in feed

Lysine is an essential amino acid and an important factor in feed that affects fish growth. The objective of the present study was to determine the optimum percentage of lysine in the feed that can produce the maximum growth performance of silver pompano seeds. These studies were performed using four different treatments of additional lysine levels; i.e.; treatment A: 0.15%), treatment B: 0.35%), treatment C: 0.55%), and treatment K: 0% for control. The study was a completely randomized design with four treatments, each consisting of three replicates. The results showed that feeding with different levels of lysine had no significant effect on body weight gain, feed consumption, absolute weight, feed conversion ratio, or survival rate, except for specific growth rate and lysine retention, which had a significant effect on fish fed treatment A (0.15%) or feed containing 3.39% lysine.