et al., F. (2025). Production of Healthy Fish Feed for Tilapia (Oreochromis niloticus) with the Addition of Bacillus cerius SN7. Egyptian Journal of Aquatic Biology and Fisheries, 29(4), 1739-1752. doi: 10.21608/ejabf.2025.444161
Feliatra et al.. "Production of Healthy Fish Feed for Tilapia (Oreochromis niloticus) with the Addition of Bacillus cerius SN7". Egyptian Journal of Aquatic Biology and Fisheries, 29, 4, 2025, 1739-1752. doi: 10.21608/ejabf.2025.444161
et al., F. (2025). 'Production of Healthy Fish Feed for Tilapia (Oreochromis niloticus) with the Addition of Bacillus cerius SN7', Egyptian Journal of Aquatic Biology and Fisheries, 29(4), pp. 1739-1752. doi: 10.21608/ejabf.2025.444161
et al., F. Production of Healthy Fish Feed for Tilapia (Oreochromis niloticus) with the Addition of Bacillus cerius SN7. Egyptian Journal of Aquatic Biology and Fisheries, 2025; 29(4): 1739-1752. doi: 10.21608/ejabf.2025.444161
Production of Healthy Fish Feed for Tilapia (Oreochromis niloticus) with the Addition of Bacillus cerius SN7
Most of the world's fish production comes from marine catches and is expected to continue increasing along with community growth and rising income levels. Aquaculture activities still largely rely on imported feed from other countries. This study aimed to analyze the effect of Bacillus cereus SN7 bacteria on the growth of saline tilapia (Oreochromis niloticus). The research method used was a completely randomized design (CRD) with five treatment levels and three replications. Fish were fed with protein-substituted feed containing B. cereus SN7 at different percentages: A0 (0%), A1 (5%), A3 (15%), and P4 (20%). The saline tilapia used were 4– 6cm in size and weighed 2.23 ± 0.72g. Fish were kept in aquariums measuring 60 × 40 × 40 cm³ with a stocking density of 10 fish/m³. The test feed was administered at 10% of the biomass weight with a feeding frequency of three times per day at 08:00, 12:00, and 17:00 WIB for a duration of 21 days. The results showed that the best treatment was the use of 20% B. cereus SN7 in the feed, which resulted in a feed digestibility of 66.67%, protein digestibility of 75.25%, feed efficiency of 31.14%, protein retention of 20.90%, specific growth rate of 2.74%, and a fish survival rate of 96%. Water quality during the rearing period remained within acceptable ranges: temperature between 25– 28˚C, pH 7.0– 8.0, dissolved oxygen (DO) between 3.5– 5.0mg/ L, and salinity at 17ppt. The use of B. cereus SN7 bacteria was shown to significantly enhance the growth of saline tilapia by improving feed digestibility, protein digestibility, feed efficiency, protein retention, specific growth rate, and survival.
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