THE EFFECT OF APPLICATIONS OF BIOFLOC CLOSED AQUACULTURE SYSTEM AND SYNBITOC FEED SUPPLEMENTATION ON GROWTH PERFORMANCE, WATER QUALITY, AND NUTRITION PROFILE OF TILAPIA (OREOCHROMIS NILOTICUS)

• Main Author: Cahya Budi Putranti, Annisa
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/55516
• Institution: Institut Teknologi Bandung

Tilapia (Oreochromis niloticus L.) is a freshwater fish commodity with one of the highest production levels in Indonesia. Tilapia aquaculture in Indonesia is still dominated by conventional open flow-through systems with a low production stability and a higher risk of contracting diseases due to the lack of water quality control during the cultivation period. The closed system of aquaculture using biofloc technology is an alternative cultivation strategy to improve cultivation performance with high disease control. In addition, the application of functional feed with synbiotic supplementation, namely a mixture of probiotics and prebiotics, is now also an alternative disease control strategy in tilapia aquaculture. In this study, water quality, fish growth and fish nutritional profile from biofloc systems were compared, using both commercial feeds ('B') or with 6 g / kg synbiotic feed ('BS'), compared to controls using a semi-batch system ('K') after 70 days of enlargement period. The tested synbiotics contained a probiotic consortium of 108 CFU / kg of feed and 0.5% of Spirulina platensis microalgae. Water quality parameters including temperature, pH, dissolved oxygen (DO), ammonium, nitrite, and nitrate concentrations in the K, B and BS treatments were in the optimum range during the enlargement period. In addition, the biological parameters include average daily growth (ADG), specific growth rate (SGR), feed conversion ratio (FCR), survival, final biomass, productivity, final weight, and final length. Treatment B resulted in means of ADG (0.83 ± 0.242), SGR (5.73 ± 0.51%), FCR (2.14 ± 0.77), survival (83.33 ± 7.45%), final biomass (1.32 ± 0.23 kg), productivity (13.25 ± 2.32 kg / m3), final weight (106.33 ± 17.24gr), and final length (17.31 ± 1, 22 cm), that were insignificantly higher compared to K (P> 0.05). Furthermore, BS resulted in an means of ADG (0.94 ± 0.30), SGR (5.91 ± 0.49%), FCR (1.66 ± 0.52), survival (91.67 ± 7.26). %), final biomass (1.68 ± 0.27 kg), productivity (16.76 ± 2.73 kg / m3), final Weight (121.35 ± 13.54 gr), and final length (17.65 ± 0.48 cm) which was insignificantly compared to B (P> 0.05). The nutritional profile analysis showed that the three treatments were in optimum conditions. The moisture content and ash content in B were significantly higher compared to K (P <0.05), while the total carbohydrates and total energy in BS were significantly higher than B (P <0.05). There was a correlation between length and weight of fish in the three treatments, with a negative allometric growth pattern (b <3) for K and a positive allometric growth pattern (b> 3) for B and BS. The relative factors in the three treatments approached the value of 1, indicating that the fish are in good health. It can be concluded that the application of the biofloc system, with or without the use of functional feed with synbiotic supplementation can improve the quality of aquaculture and the growth of tilapia with a good nutritional profile, leading to its potential to be applied for intensive tilapia rearing on an industrial scale.