| Author | Lai, Qiuming |
| Call Number | AIT Thesis no.AE-88-29 |
| Subject(s) | Cladocera
|
| Note | A Thesis submitted in partial fulfilment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Two experiments on mass culture of Moina macrocopa based on culture of
Chlorella were conducted in 4 outdoor concrete tanks. Both commercial
fertilizer (urea, triphosphate) and septage were used as major nutrients
source; garden soil extract and mono-sodium glutamate waste (Ami-Ami) were
used as micronutrients source. Septage was an effective and complete
fertilizer for Chlorella growth. The optimum loading of septage in algal
growth medium was at 30 ppm TKN; additional urea input to increase the
nitrogen concentration resulted in a higher production of Chlo1·ella (4. 1 x 106
cells/mL). Chlorella growth rates between two fertilizers were not
significantly different. Ami- Ami as a micronutrients supply was more
effective than garden soil extract.
The production of M. Macrocopa was positively related to the abundance of
available food. The highest yield, 1078 g wet weight biomass/week was
obtained in a 5 m2 tank in the first experiment. M. macrocopa could grow on
bacteria and organic detritus with a relatively low yield at 193 g wet
weight/week/tank. In second experiment, M. macrocopa was continuously
cultured for 9 days, the peak population density reached 7500 individuals/L.
M. macrocopa growth was similar with two types of effluent of algal culture .
Total ammonia and free un- ionized ammonia (NH3 -N) ranged from 9.2 to 10.9
mg/L and 0.7 to 7.7 mg/L, respectively. But it was not fatal to M. macrocopa.
Life cycle of M. macrocopa was observed in batch culture in the
laboratory. Fed with abundant Chlorella the M. macrocopa population density
reached 43 individuals/mL. Larvae matured in two days and produced progeny
on the third day after birth. Each adult female produced a brood of 3 to 26
youngs daily throughout an maximum of 9-day life span. Filtering rate was
positively correlated with algal concentration and body size of M. macrocopa. |
| Year | 1988 |
| 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) | Lin, Chang Kwei |
| Examination Committee(s) | Edwards, Peter ;Wee, Kok Leong
|
| Scholarship Donor(s) | DAAD, The Federal Republic of Germany |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1988 |