Effect of adding non-fermented and fermented rice bran using probiotics (bacillus sp.) On the growth performance of Nile tilapia (Oreochromis niloticus) fry nursed in concrete tanks | |
| Author | Toliya, Lerish Prafulkumar |
| Call Number | AIT Thesis no.AQ-21-04 |
| Subject(s) | Probiotics Nile tilapia Fishes--Growth |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Aquaculture and Aquatic Resources Management |
| Publisher | Asian Institute of Technology |
| Abstract | The growth performance, water“quality parameters and economics of Nile tilapia fry nursed in a culture system consisting of nine circular concrete tanks (h = 1.08 m; r = 1.15 m; water volume = 3,300 L) were evaluated for 42 days in this study. The experiment consisted of three treatments, (Treatment 1) aquamimicry (fermented rice bran + commercial probiotic Bacillus sp. added), (Treatment 2) probiotic (only probiotic added) and (Treatment 3) control (exchange water to reduce ammonia). Nile tilapia fry with an initial weight of 0.05 ± 0.03 g were stocked at a stocking density of 6000 fry per tank and fed with a commercial feed containing 42.9% crude protein at a rate of 10% body weight. Water was analyzed for TAN, NO2, alkalinity and TSS weekly, and dissolved oxygen, pH and temperature twice daily. Results indicated that the water quality in the aquamimicry system was found to be better compared to other treatments. The FCR of aquamimicry treatment (1.16 ± 0.1) was significantly lower (p < 0.05) than the probiotic treatment (1.50 ± 0.01). The SGR was also found to be slightly higher (p < 0.05) in aquamimicry (10.94 ± 0.03) compared to the control (9.97 ± 0.08). The economic evaluation of the treatments revealed that the profit margin was highest for the aquamimicry (13.9%) compared to the control (5.6%) and probiotic treatments (-8.4%). Thus, the results of the experiment concluded that an aquamimicry system could be suitable for tilapia fry rearing in cement tanks in terms of better FCR, water quality and economic profitability for commercial hatcheries and farms. However, further research is recommended to understand the optimum stocking density and the impact of different strains of Bacillus sp. used as probiotics in enhancing the water quality parameters and growth of tilapia fry for maximizing the efficiency of aquamimicry culture technique. |
| Year | 2021 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Aquaculture and Aquatic Resources Management (AQ) |
| Chairperson(s) | Salin, Krishna R. |
| Examination Committee(s) | Yakupitiyage, Amararatne;Bhujel, Ram C.;Loc Thai Nguyen |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2021 |