THE EFFECT OF STOCKING DENSITY ON THE PERFORMANCE OF NILE TILAPIA (Oreochromis niloticus) CULTURE USING RECIRCULATION AQUACULTURE SYSTEM (RAS)

• Main Author: MANUEL (NIM : 10613075), OLIVER
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/23632
• Institution: Institut Teknologi Bandung

The aim of this study was determine the performance of Nile tilapia fingerlings (Oreochromis niloticus) raised at difference stocking density in a Recirculating Aquaculture System (RAS). The experimental system was performed in a single-batch nursery in 30 days. Fish (5,35 ± 0,99 gr) were stocked in triplicate at 20 (A) ; 40 (B) ; and 60 (C) fish in 100 L water. The RAS components used in this study includes culture tanks, sedimentation tank, protein skimmer, activated carbon tank, and biofilter containing nitrifying bacteria. During the rearing period the physico-chemical parameter and total heterotrophic bacteria of water are measured periodically to determine the water quality of each treatment. Based on the results, the average value of water quality at stocking density 20 ; 40 ; and 60 fish were not significantly different (P > 0,05), which the values of NH4+(0,42 ± 0,39; 0,507 ± 0,34; 0,442 ± 0,5 mg L-1), NO2- (0,379 ± 0,23; 0,395 ± 0,26; 0,533 ± 0,36 mg L-1), NO3- (70,305 ± 25,88; 70,112 ± 25,8; 70,498 ± 26,05 mg L-1), and total heterotrophic bacteria (858,13 ± 167,19; 928, 75 ± 217,69; 1175 ± 227,56 CFU ml-1). For 30 days rearing, biological parameters of stocking density 20 ; 40 ; and 60 fish did not differ significantly (P > 0,05), which the final weight (9,73 ± 0,31; 10,27 ± 0,39; 9,88 ± 0,85 gr),survival rate (75 ± 4,08; 65 ± 12,25; 71,11 ± 9,26 %), feed convertion ratio(1,47 ± 0,08; 1,39 ± 0,07; 1,55 ± 0,12), and specific growth rate (1,99 ± 0,11; 2,17 ± 0,13; 2,03 ± 0,28 % hari-1). Based on this study, RAS could maintain the water quality remains at optimum range for tilapia growth up to 60 fish and best performance was found at 60 fish in 100 L water.