Factors affecting the carrying capacity of tilapia (Oreochromis niloticus) pond culture | |
| Author | Gunadi, Bambang |
| Call Number | AIT Thesis no. AS-99-11 |
| Subject(s) | Tilapia Pond aquaculture |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AS-99-11 |
| Abstract | An experiment with 24 factorial design was conducted to study the main and interactive effects of pond fertilization, supplementary feed, stocking density, and aeration on the yield and growth performances of tilapia, and to develop model to quantify the the magnitude of factors effect on tilapia yield under particular pond management regimes. Four factors involved in this experiment were fertilization, feeding level, stocking density and aeration. Each factor had two levels and the treatments were duplicated. Two levels of fetiilization were no fertilization as low level and inorganic fertilization with combination of urea and TSP at a rate of 30.43 and 17.86 g/tank/week, as high level. Two levels of feeding rate were 0.5% of total biomass as low level and 100% satiation rate as high level. Two levels (categories) were applied for stocking density factors, i.e. 2 fish/m3 as the low stocking density and 5 fish/m3 as the high stocking density. The aeration treatments had two levels, i.e. no aeration as low level and aeration application with a rate of 19.40 (± 0.77) L/min per tank as high level. The experimental fish used in this experiment were all male sex-reversed tilapia (Oreochromis niloticus) with initial size of 24 (± 0.4) g/fish. The commercially pelleted fish feed was used as experimental feed. The growth performances (yield, daily weight gain, feed conversion ratio and apparent net protein utilization) of tilapia was affected by feeding levels, stocking density and aeration with some variations in term of main or interactive effects of them. Fertilization had no significant direct effect on tilapia growth performances. Feeding levels had higher effect on tilapia yield than other factors (stocking density and aeration). Regression coefficient of feeding levels in production model is 188.86, compared to stocking density (148.51) or aeration (71.43). Combining the effect of all factors and their interaction comprises 88.41 % of the variance of yield in tilapia pond culture. |
| Year | 1999 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AS-99-11 |
| 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 Aquatic Systems (AS) |
| Chairperson(s) | Yakupitiyage, Amararatne; |
| Examination Committee(s) | Lin, C. Kwei;Edwards, Peter; |
| Scholarship Donor(s) | Government of the Republic of Indonesia; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1999 |