Studies on the nutritive value of cassava in pelleted feed for tilapia (oreochromis niloticus) | |
| Author | Ng, Lean Teik |
| Call Number | AIT Thesis no.AE-84-20 |
| Subject(s) | Tilapia Cassava as feed |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources & Development |
| Publisher | Asian Institute of Technology |
| Abstract | Five experimental diets containing 15%, 30%, 45%, 60% and 95% cassava were formulated and fed to groups of Oreochromis niloticus for 10 weeks. A group receiving no feed was included as a control. Eighteen rectangular concrete thanks were used in the feeding trial. Water in the tanks was not changed throughout the experiment. Water quality parameters such as dissolved oxygen, pH, temperature, total alkalinity, chlorophyll a and ammoia-nitrogen were monitored regularly. To determine the nutritional value of cassava a, growth rate, food utilization and body composition were studied. Fish fed the diet containing 60% cassava had the highest weight gain. No significant difference (p<0.05) was observed in the FCR, PER and apparent NPU among diets containing 15%, 30% 45% and 60% cassava, The diet containing 95% cassava gave the poorest growth rate and lowest food conversion efficiency. Increased levels of cassava in diets increased carcass fat content. No nutritional pathology was found in fish red with high levels of dietary cassava. Results of the water quality assessment revealed that all parameters measured were within acceptable limits. There was phytoplankton growth in all experimental tanks due to the fertilization effect of uneaten feed and farces. The contribution of phytoplankton to the nutrition of the experimental fish was not quantified although the amount was probably small since densities were an order of magnitude less than in fertilized systems. |
| Year | 1984 |
| 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 | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Wee, Kok Leong |
| Examination Committee(s) | Edwards, Peter ;Colman, John.A |
| Scholarship Donor(s) | Government of Australia |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1984 |