The effect of different quality feeds on the nutrient utilization efficiency, growth and yield of monosex gift tilapia | |
| Author | Huynh Huu Ngai |
| Call Number | AIT Thesis no.AQ-03-22 |
| Subject(s) | Tilapia Feed utilization efficiency |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-03-22 |
| Abstract | The availability of potential feed resources and their seasonality in Cho Gao, Go Cong Tay and Go Cong Dong districts of Tien Giang province, Vietnam, were investigated using participatory rapid appraisal (PRA) methods. The study was focused on the ways in which the farmers use available feeds for fish culture, the preferred fish species, and the fish and feed prices. One-hundred-forty-two fish farmers participated in the survey. The majority of them grew Nile tilapia (Oreochromus niloticus). The result showed that the polyculture of tilapia was the most popular culture practice and the second popular cultured species was the river catfish (Pangasius hypophthalmus). The preference for tilapia was mainly due to its easiness of culture and the availability of feeds. Using the results of the survey, three least cost feeds were formulated using originated from Cho Gao district (Treatment 1 ), Go Cong Tay district (Treatment 2), and Go Cong Dong district (Treatment 3). These feeds were tested with mono-sex GIFT tilapia with mean weight of 19.6 g stocked in hapa- based experimental system for 42 days. The hapas were installed in three 200 m2 earthen ponds and the each pond is considered as a block. The fish were stocked at a density of 30-fish/ hapa and feed at a rate of 4% of body weight. Mean weight of body, specific growth rate and net yield were significantly different among three treatments (P< 0.05). Results showed that the fish in Treatment 1 had higher growth rate than in Treatment 2 and Treatment 3. Observed FCR in the Treatment 1 was significantly lower (P< 0.05) than treatments 2 or 3. Net yield of Treatment 1 (5.85 ± 0.54 g/m2/day) was significantly the higher (P<0.05) than the treatment 2 (4.92 ± 0.39 g/m2/day), and treatment 3 (5.35 ± 0.39 g/m2/day). Partial budget analysis showed that the net returns of feed formula 1 were also higher than that of the other feeds making it the most suitable feed for tilapia culture. Although this indicates that the feed formulated with ingredients from Cho Gao is most suitable feed for the growth, positive growth, feed utilization efficiency (FCR = 1.13 - 1.26) and economic benefits observed with feed formulated ingredients from Go Cong Tay and Go Cong Dong districts can also be used effectively for culturing fish in Tien Giang province. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-03-22 |
| 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) | Yakupitiyage, Amararatne |
| Examination Committee(s) | Bart, Amrit ;Yi, Yang |
| Scholarship Donor(s) | DANIDA |