| Author | Chanpithya Shimphalee |
| Call Number | AIT Thesis no.AE-88-38 |
| 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 fi s h 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 |