| Author | Sarinee Tuntipaswasin |
| Call Number | AIT Thesis no. AQ-00-18 |
| Subject(s) | Shrimp culture
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of ScienceSchool of Environment, Resources and Development, |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-00-18 |
| Abstract | A series of experiments was conducted to determine the limiting nutrients in fertilized intensive shrimp ponds, using unialgal cultures of Chiarella sp. (green algae) and Chaetoceros sp. (diatom) as assay species. These experiments were conducted in two trials with 18 combinations of nutrient enrichment in two media with fresh seawater media or soilextract media. The tested nutrients were nitrogen, phosphorus, silica, chelator, trace metals .and vitamins. Cell count and chlorophyll a concentration was used to evaluate algal growth responses. The tested species in all treatments were cultured in 300-mL test medium and incubated at ambient temperature and 4,000 to 5,000 lux for 5 days. Growth response showed that soil extract stimulated significant bloom for both tested species, especially green algae. In this test, trace metals had the large effect on green algae only. Omission of nitrogen, trace metals and phosphorus usually markedly inhibited growth for both algal species, when cultured in fresh seawater media. Algal growth also responded to an addition of chelator (EDTA) in the presence of nitrogen and other elements. Silica omission limited diatom growth. A series of similar bioassay was also conducted to determine limiting nutrients to natural phytoplankton of an assembly plastic lined pond during a shrimp grow-out cycle. All treatments were cultured in 20-L pond water and incubated at outdoor condition with 40,000 to 50,000 lux for 6 days. The results showed responses in phytoplankton growth similar to preliminary experiments when diatom was the dominant specie in this shrimp pond. Omission of Si, N, trace metals and chelator from the complete nutrient enrichment gave the greatest effect on chlorophyll a production. From those observations of all experiments, trace micronutrients were the most obvious limiting nutrient for growth of phytoplankton in plastic lined shrimp ponds |
| Year | 2000 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-00-18 |
| 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 | Aquaculture and Aquatic Resources Management (AQ) |
| Chairperson(s) | Lin, Chang Kwei; |
| Examination Committee(s) | Yakupitiyage, Amararatne.;Yi, Yang; |
| Scholarship Donor(s) | Charoen Pokphand Group of Companies, Thailand; |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2000 |