Assessment and preliminary trials of nursing common carp in cages in Eakao reservoir, Vietnam | |
| Author | Truong Ha Phuong |
| Call Number | AIT Thesis no. AS-98-22 |
| Subject(s) | Carp--Vietnam Fish-culture--Vietnam |
| 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 | The scarcity of large fingerlings, both in government and private hatcheries, has sometimes caused farmers to buy fish transported from HoChiMinh City with expensive price and high mortality rate. A local fingerling production strategy cannot be realized due to lack of land for pond construction and unavailability of alternative culture methods for nursing fish in highland areas. Results from the survey revealed 100% of interviewed farmers agreed that common carp was the best species for nursing as well as growing out in the local. However, due to scarcity of fry as well as fingerling has caused high fluctuation of price all year round. Yearly estimated production of Eakao reservoir is about 150 tons, in Vietnamese context turn Eakao a high productive reservoir with a productivity of about 430kg ha-1 asuming a surface area of 3 50ha. This is significantly higher than the average of North Vietnamese stocked reservoirs. Further experiments were conducted in nursing cages of common carp to determine the optimum feeding rate and optimum stocking density. Besides, economic feasibility of cage culture is investigated at the end of each experiment. Experiment 1 was set up at protein contents of 24%, 36% and 42% in diets. The highest SGR (2.63%), DWG (0.041g/day) and survival rate (92.8%) obtained from fish fed on diet contained 42% protein. The lowest values of those (2.02%, 0.028g/day and 88.6% respectively) obtained from fish fed on diet contained 24% protein content. There was no significant difference of SGR, DWG and SR between fish fed on feed 2 (36% protein) and feed 3 ( 42% protein). However, there were both significantly higher than that of fish fed on feed 1 (24% protein) (p<0.05). FCR were 2.6, 2.36 and 2.33 in correspondence to fish fed on feed 1, feed 2 and feed 3. Feed 2 (36% protein) is considered as the best one in terms of nutritive requirement as well as economics. Experiment 2 was to determine the optimum stocking density among densities of 500 fish m-2 , 750 fish m2 and 1000 fish m2 . The highest SGR (2.92%), DWG (0.06g/day) and survival rate (97.8%) obtained from fish in the lowest stocking density (500fish m2 ) . Meanwhile, the lowest values of those (2.43%, 0.044g/day and 93.0% respectively) are obtained from fish in the highest stocking density. There was no significant difference of growth performances between fish in density 1 (500 fish m2 ) and density 2 (750 fish m-2 ) . Nevertheless, there were both significantly higher than that of fish in density 3 (1OOOfish m2 ) . |
| Year | 1998 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Aquatic Systems(AS) |
| Chairperson(s) | Yakupitiyage, Amararatne ;Lin, Chang Kwei ; |
| Examination Committee(s) | Bart, Amrit; |
| Scholarship Donor(s) | Mekong River Commission ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1998 |