| Author | Kamal, Md. |
| Call Number | AIT Thesis no. AE-83-21 |
| Subject(s) | Water-hyacinth as feed
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Varying levels of composted and dried water-hyacinth were used to replace NIFI feed as a diet for the tilapia (Oreochromis niloticus). The experiment was conducted for a period of 84 days, during which the water in
the experimental tanks was not changed. At the end of the experiment, grow.th
responses of fish to each dietary treatment was calculated in terms of weight gain, feed conversion ratio (FCR) and protein efficiency ratio (PER). Growth response curves indicated that replacement of 50% NIFI feed with composted
water hyacinth performed the best. Generally, good feed conversion ratios were obtained with all experimental diets averaging 2.4, except the diet containing 100% composted water-hyacinth with a value of 4.84. There was an increase in body lipid content and a corresponding decrease in body moisture content with an increase in the level of NIFI feed.
There was a fertilization effect by uneaten feed and fish feaces. With these inputs, the level of nutrients within the experimental tanks. increased,
leading to phytoplankton growth. As the test fish (Oreochromis niloticus)
is a phytoplankton feeder, phytoplankton biomass present in the experimental tanks would be expected to contribute to their nutrition as well as test
diets. However, it was not ascertained what proportion phytoplankton biomass
contributed to the overall nutrition of the test fish. There was a dissolved oxygen problem in some treatment tanks, particularly those tanks with high phytoplankton biomass, especially at dawn. There were no distinct differences in water pH, alkalinity and temperature between the various treatments although there were considerable semi-diurnal variations within treatments. |
| Year | 1983 |
| 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) | Edwards, Peter ; Wee, Kok Leong |
| Examination Committee(s) | Kim, Kong-Hwan
|
| Scholarship Donor(s) | Government of Belgium |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1983 |