Environmental impacts from feeds used in aquaculture systems in the vicinity of Mekong River, Vietnam | |
| Author | Chau Thi Da |
| Call Number | AIT Thesis no.AQ-07-20 |
| Subject(s) | Aquaculture--Environmental aspects--Vietnam--Mekong River Region Feeds--Environmental aspects--Vietnam--Mekong River Region |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Aquaculture and Aquatic Resource Management, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-07-20 |
| Abstract | This study was conducted in My Hoa Hung village in Long Xuyen city, An Giang province, Mekong River in Vietnam during August to December 2007, to assess environmental impacts from feeds used in aquaculture systems such as intensive fish cages, pens and ponds culture on and in the vicinity of Mekong River, Vietnam (e.g. Pangasius Hypopthalamus. Colossoma macropomum species. Moreover, the purpose of this study is to investigate the effects of feeds in the intensive aquaculture systems towards water environment. The study was commenced by a field survey of twenty Pangasius hypophthalmus cage farmers, 18 Pangasius hypophthalmus pond farmers, 20 Pangasius hypophthalmus pen farmers and 1 Colossoma macropomum cage farmers. The survey showed that the fish culture in An Giang province was developed and operated by farmer's indigenous knowledge. The fish density is quite high of 80-105 fish/m² as compared with the optimum range of 30-60 fish/m². There are three kinds of popular feeds such as homemade, pellet and Pangasius waste used in this area. The pellet feed is more effective in terms of economic profit, less environmental pollution, better product quality and reduction in trash fishes from nature. Among three of culture systems, pen culture has more economic benefits because this system is separate from other systems. It is located in the alluvial grounds with high water turnover so that fish is not affected by disease transmission from other farms. Water quality of the river is still in the limit for fish culture in three surveyed months of August, October and December. Nitrogen and phosphorus concentrations of October are lowest because this time is the peak up of flooding season. In this study the adverse effects of fish culture is not revealed clearly due to the survey carried out in the rainy season. |
| Year | 2007 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-07-20 |
| 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) | Amararatne Yakupitiyage.; |
| Examination Committee(s) | Yi, Yang;Gallardo, Wenresti;Berg, H.; |
| Scholarship Donor(s) | MOET, Vietnam;AIT Fellowship; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2007 |