| Author | Srirat Sodsook |
| Call Number | AIT Thesis no. AE-89-36 |
| Subject(s) | Fish-culture
|
| Note | A thesis submitted in partial fulfillment of the requirement
for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Nursing methods of juveniles fish in nylon hapas in pond was
conducted both on-campus trials in AIT a n d on-farm trials in
Udonthani Province , N.E. Thailand.
The first experiment on-campus compared nursing juveniles
in 4 0 m2 nylon hapas 2 stocking densities of common carp
( Cyp.ri1111s carpio ) , 7 5 a nd 1 50 /m 2, a nd polyculture with MT -
treated tilapia ( Oreochromis niloticus ) at 75 /m2 each . Th e
second trial determined both the appropriate stocking density of
common carp fry i n polyculture with MT- treated tilapia in 5.4 m2
nylon hapas at 150 and 300 /m2, and the appropriate ratio of MT-treated tilapia and common carp at 1:1 , 2:1 , and 4:1
respectively. On-farm trials were conducted in Kumpawapi
district, Udonthani Province to develop appropriate methods of
nursing juvenile fish in nylon hapas for s mall- scale farmers.
The first experiment, showed t h at t h e growth of MT- treated
tilapia increased very fast, from an initial weight of 0.19 g to
12 . 89 g within 13 weeks , but s lowly for common carp . The final
size of commo n carp fingerling showed highly significant
differences between ( P<0.01 ) treatment. The highest mean
individual weigh t was obtained from low stocking density ( 3. 26
g ) , followed by polyculture (2.65 g ) and high density monoculture
(2.13 g ) respectively. I n the second experiment , a high stocking
density of MT - treated tilapia and common carp showed
significantly (P<0. 01 ) lower growth t h an a J. ow stocking, but
there ratio h ad no significant effect. Juveniles nursed on farms,
in a variety of polycultures , showed very fast growth and high
survival in all cases . Concentration of dissolved oxygen and
the presense or absense of fish outside the hapas may have
affected growth and survival of fish fingerlings especially
common carp. |
| Year | 1989 |
| 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 Food Engineering (AE) |
| Chairperson(s) | Little, David C.
; |
| Examination Committee(s) | Machintosh, Donald J. ;Knud-Hansen, Christopher F. ; |
| Scholarship Donor(s) | Canadian International Development
Agency (CIDA ) ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1989 |