| Author | Amornchai Sirisai |
| Call Number | AIT Thesis no.AE-88-39 |
| Subject(s) | Fish-culture--Thailand--Nakhon Nayok
|
| 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 | A farm trial was conducted in a rainfed village in Banna district Nakhon-nayok province to develop appropriate methods of fish cultivation for small-scale farmers. Mono -sex male tilapia were compared with mixed sex- tilapia in a polyculture with common carp and tawes. Three farmers participated in this trial and were provided with fingerling fish, feed and supervision. After the trial the participants were monitor in order to know their response to the ยท trial and their future plans. Other villagers in the same village were interviewed in order to know the impact of the trial on them. A survey was also conducted in other near- by villages to know the general stat us of fi s h culture in Banna district so that it could b e compared to t h e trial results. In two comparable ponds, 63% of sex-reversed tilapia had total body length of 20-25 cm whilst 84% of ordinary tilapia had a total body length of only 1 5-20 cm. The average extrapolated yield of ponds stocked with sex-reversed tilapia and with ordinary tilapia were 5306 kg/ha/yr and 4045 kg/ha/yr respectively. However survival rates of fish in t he four ponds were different, and were relatively low. The average extrapolated yield from the 400 sq. m pond stocked with sex-reversed tilapia was 2 14 kg/yr which is sufficient to supply the animal protein requirement of one typical family C 5 members ) . Whereas the average extrapolated yield from the 400 sq. m pond stocked with ordinary tilapia was 166 kg/yr which can provide only 9 1 % animal protein required by one typical family. The net profit from the trial ponds ranged from - 485 to 397 baht/ 400 s q. ml 4 months. Al 1 participants expressed their interest in continuing fish culture. The trial had an impact on other villagers since some of them have dug ponds after they saw the results of the fish trial . Fish culture in that area is now gaining momentum, since many farmers in other near- by villages have started raising fish this year, and one fish fingerling farm has been established this year. However the development of fish culture could be retarded as t h e number of fishery officers is not sufficient. |
| 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) | Peacock, Christabel P. |
| Examination Committee(s) | Gartner, Joseph A. ;Little, David C. |
| Scholarship Donor(s) | The Royal Government or Thailand |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1988 |