The Effect of Adding Lysine in Commercial Feed on Growth Rate, Feed Efficiency, and Feed Convertion Ratio to Tambaqui (Colossoma Macropomum)

Abstract

Tambaqui (Colossoma macropomum) is one of the freshwater fishery commodities of high economic value. Its delicious taste like that of carp makes it popular and the demand for this commodity increases every year both for domestic and export market (Samardyanto, 2011). Tambaqui needs amino acids to improve its growth process, one essential amino acids can only be obtained through lysine foods. Lysine is one of the ten essential amino acids. The purpose of this research is to find out how the administration of lysine on commercial feed increases tambaqui's growth rate, feed efficiency, and feed conversion ratio. This is experimental research, using Completely Random Design (RAL) with 4 treatment and 5 repeats on each treatment. The dosage of lysine added in commercial diet were P0 (0%), P1 (0.6%), P2 (1.2%), and P3 (2%). The observed parameters include growth rate, feed efficiency, and feed conversion ratio. The data analysis used was Variant Analysis (ANOVA) followed by Double Distance Test Duncan. The results showed the addition of lysine on commercial feed during a 30- day maintenance had the same effect (P > 0.05 ) on the growth rate of tambaqui, the same effect (P > 0.05 ) on the feed efficiency, and quite similar (P > 0.05 ) on the feed conversion ratio of tambaqui. When we increased the amount of lysine in the administration of commercial feed to the fish, we observed an increase in the growth rate, specific growth rate, feed efficiency, and feed conversion of ratio in tambaqui. The best treatment was found in P1 treatment with lysine dosage 0.6%, and the highest growth rate of 1.726 grams/day, specific growth rate was 2.326%/day, feed efficiency 68.70%, and the feed conversion ratio of 1.472. We observed that the P0 treatment i.e. treatment without lysine had a value growth rate, specific growth rate, feed efficiency, and feed conversion ratio of respectively 1.243 grams/day, 1.796%/day, 53.25%, and the feed conversion ratio 1.924.