| Author | Angeles, Raul V. |
| Call Number | AIT Thesis no.AE-85-26 |
| Subject(s) | Fish-culture
|
| 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 |
| Abstract | Three experiments involving algae-to-fish conversion efficiencies in inorganically fertilized fish tanks were conducted. In all experiments attempts were made to establish unialgal cultures so that conversion efficiencies could be related to algal species. Experiment no.1 was conducted in 4.8 m2 rectangular tanks inculcated with several different natural populations of algae from cesspool slurry-fed ponds at A.I.T. while Experiment no. 3 was conducted in similar thanks but inoculated with a population almost exclusively Microcystic. Experiment no. 2 was conducted in 680 liter capacity circular tanks inoculated with scenedesmus cultured in the laboratory. All tanks were stocked with tilapia oreochromis niloticus t 5 fish/m2. In experiment no.1 fish in microcystis dominated tanks exhibited the highest growth at an average of 3.72 g/m2/d for the culture period a food conversion ration of 2.0. In experiment no.2 no. reliable food conversion can be ascertained because of the under estimation of the primary productivity in the scenedesmus tanks due to oxygen lost through bubbles formed in the tank. For experiment no.3, where fertilizer treatments varied, the tanks with inorganic fertilizer and cesspool slurry added and dominated by Microcystis had the higher average growth rate compared to those with cesspool slurry only at 6.35 and 4.61g/m2/d, respectively, Food conversion rations were 1.05 for the tanks with inorganic and organic fertilizer and 2.25 for those without inorganic fertilizer. The low food conversion ration for Microcystis - dominated tanks indicated that an efficient algae-to-fish feeding system had been found. |
| Year | 1985 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Colman, John.A |
| Examination Committee(s) | Edwards, Peter ;Wee, Kok Leong |
| Scholarship Donor(s) | DAAD |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1985 |