Nursing of Asian seabass (Lates calcarifer) fry with tilapia (Oreochromis niloticus) fingerlings at different densities in probiotic system | |
| Author | Sawant, Ruchira Sandeep |
| Call Number | AIT Thesis no.AQ-22-03 |
| Subject(s) | Fishes--Feeding and feeds Seabass Tilapia Probiotics |
| 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 goal of this study was to evaluate the effect of different stocking density on growth and survival of Asian seabass, Lates calcarifer with Nile tilapia, Oreochromis niloticus in Nursery rearing of Probiotic system. Four different stocking densities of both Asian seabass and Nile tilapia consisting of 130 Asian seabass, 120 Asian seabass and 10 tilapia, 110 Asian seabass and 20 tilapia and 100 Asian seabass and 30 tilapias as Control, Treatment 1, Treatment 2 and Treatment 3 respectively, were randomly stocked in 12 tanks of 500 litre capacity (1.16 x 0.86 x 0.64 m3 ). Each treatment consisted of triplicate groups with initial size of Asian seabass and tilapia as 0.35 ± 0.01 g/fish and 1.20 ± 0.04 g/fish, respectively were used for the experiment that lasted for 68 days. The aim of the experiment was to evaluate the best stocking density for Asian seabass when cultured with Nile tilapia. Both Asian seabass and tilapia were fed initially with 57% protein and later with 45% protein diet at 6-8% bodyweight twice daily (8.00 am and 4.00 pm). Sampling was done after every 14 days. Water sampling was done at alternate weeks. Data on changes in weight, proximate analysis, Bacterial count and water quality parameters were analysed using SSPS program version 22 at significance 5% or 1%. The results showed that the total batch weight of Asian seabass of T1 (469.53 ± 36.28g) was significantly higher (P < 0.05) than T2 (136.27 ± 76.69), T3 (127.40 ± 94.05) and control (269.50 ± 44.72). However, there was a significant difference (P <0.05) found in the survival of Asian seabass. The low stocking density showed high survival among all treatments. The specific growth rate (SGR) of Asian seabass was not significant among the treatments, but Treatment 1 had high SGR as compared to other treatments. The FCR of Asian seabass ranged from 0.6 to 1.5. There was a significant difference (P < 0.05) found in the FCR, PI and LI of Asian seabass. The proximate analysis of final Asian seabass and tilapia had no significant difference (P > 0.05) among all treatments. The total bacterial count of water and fish gut showed no significant difference (P > 0.05) among all the treatments. In conclusion, the best growth and survival of Asian seabass and tilapia was found in low stocking density. Further research can be done on different stocking densities with different strains of probiotic bacteria. |
| Year | 2022 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| 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) | Bhujel, Ram C.; |
| Examination Committee(s) | Ha, Thanh Dong;Salin, Krishna;Perera, Anusha; |
| Scholarship Donor(s) | AIT Scholarships,; |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2022 |