The relationship between water quality and feeding regime in intensive tank culture of tilapia (Oreochromis niloticus) | |
| Author | Nualanong Tongdee |
| Call Number | AIT Thesis no. AE-95-22 |
| Subject(s) | Tilapia Fish-culture |
| Note | A thesis submitted in partial fulfillment of r requirements for the degree of Master of Science, School of Environment, Resources, and Development |
| Publisher | Asian Institute of Technology |
| Abstract | An experiment was conducted for a period of 84 days to determine the appropriate feeding regimes for Nile tilapia (Oreochromis nilotlcus) and effect of different feeding regimes on water quality in intensive culture system. Complete diet was given to the fish with 5 feeding schedules in relation to diel water quality fluctuation in green water tanks where treatment 1 was that fish were fed once a day at 6 am, treatment 2, fish were fed once a day at 9 am, treatment 3, fish were fed once a day at 6 pm, treatment 4, fish were fed twice a day at 9 am and 1 pm, and treatment 5, fish were fed 4 times a day at 9 am, 11 am, 1 pm and 3 pm. The feeding performances, fish growth and water quality were determined throughout the experiment. The total feed intakes in treatments 1, 2, 3, 4 and 5 was 2,439.9 g, 3046.9 g, 2477.2 g, 3023.0 g and 3201.4 g respectively. The overall relative feed intakes (%BW/day) for those treatments were 1.91%, 2.32%, 2.05%, 2.39% and 2.54%,with corresponding food conversion ratio of 0.90, 0.98, 0.94, 1 .21 and 1 .39, respectively. Final fish size in each treatment was 238.4 g, 264.5 g, 232.8 g, 241.4 g and 239.4 g with the daily weight gain (g/fish/day) of 2.21, 2.59, 2 . 20, 2.28 and 2.23, respectively. There were no significant differences in the overall feeding performances and fish growth among those 5 feeding regimes. In different feeding regimes throughout the experimental period, the maximum and minimum dissolved oxygen concentration in tanks ranged from 0.3 mg/L to 11.6 mg/L while afternoon DO ranged from 2.2 mg/L to 16.7 mg/L. Temperature in the afternoon ranged from 30.4 to 34.5 C and total ammonia concentration ranged from non- detectable to 0.42 mg/L. There were no significant difference in terms of water quality parameters among the various feeding regimes |
| Year | 1995 |
| 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 | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Lin, C. Kwei |
| Examination Committee(s) | Yakupitiyake, Amararatne;Humbrey, John B. |
| Scholarship Donor(s) | H. M. King's Scholarship Royal Thai Government (RTG) |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1995 |