The Right Time to Add A Commercial Feed for Rabbitfish (SiganusGuttatus) from 10 to 25 Days of Age

Abstract

A study on the timing of the start of supplied commercial feed for rabbitfish fry (Siganus guttatus) to determine the optimal survival rate and growth in terms of length and weight at 30 days. Four trials, 3 replicates each, and 4 batches in 2020 – 2022 differed when supplied commercial feed to fish fry at 10, 15, 20, and 25 days old before provided commercial feed, all larvae fed by zooplankton and phytoplankton. The results showed that the rabbitfish fry supplemented with commercial feed at 20 days old (NT3 (20)) showed the fastest growth in length, an average of 18.53 mm at 30 days old, average daily increase of the size of 0.65 mm/day and growth rate of size of 5.95% and 36.98 to 38.01g/head of trial 3 (TN3) (20) in 4 feeding batches, and the highest survival rate of 71.85% and weight at the final feeding stage at 30 days of age. There were significant differences in weight growth for the fish fry from at last feeding, and during the fry stages, fish tends to grow in length continuously, then increase in weight later. There was a significant impact by stomach volume at 30 days of the age of NT3 was much higher than in other trials. The other three timing trails of commercial feeding did not have any differences and showed less effectiveness than the treatment of fish at 10, 20, and 30 days old in terms of growth in length, weight, and survival rate. The stomach volume of Fries was stimulated by feedstuffs and early supplied feed to fries when they could eat; trial 3 (NT20) was the biggest stomach size, with a circumference of 11,76 mm2.