| 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 |
