| Author | Ruangvit Yoonpundh |
| Call Number | AIT Thesis no. AE-92-24 |
| Subject(s) | Fishes--Feeding and feeds
|
| Note | A thesis submitted in partial fulfillment of requirements for
the Degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | An experiment ~as conducted at Jitkaseam farm, Samut pra-karn
Province for a period of 98 days to investigate the growth
performance of snakeskin gourami (Tricho qaster pectoralis) cultured
in 15 nylon net cages suspended in an earthen pond under similar
pond management. There was a control and four treatments in
triplicate fed with different supplementary feeds : jointed spike
rush detritus, water spinach detritus, rice bran and commercial
pellets feed. Feed input was based on a dry weight of crude protein
per fish weight per day, i.e. 20g protein/kg fis h/day in the first
month and decreased to lOg during the rest of the experimental
period. The composition and nutritional value of detritus from
decomposed jointed spike rush and water spinach were also
evaluated.
Although there was a trend showing that commercial pellets
feed supported better growth than that of other treatments .
However, no significant difference (p>0.05) was observed in daily
weight gain (g/day) and specific growth rate (%/day) among
treatments . Water spinach cletritus possessed more protein and
decomposed more rapidly than jointed spike rush detritus . Analysis
of attached micro-organisms, detritus composition, phytoplankton,
zooplankton in pond water and fish stomach content showed similar
composition , indicating that snakeskin gourami is omnivorous feeds
in all habitats in the pond.
The study also included observations made on two unreplicated
earthen ponds with different pond management. The extraporated
total net yield of fish was 1505.6 kg/ha/yr in enriched traditional
pond culture system where the weed (jointed spike rush ) was
cultivated, chicken manure was added at rate 250 kg/ha/week (on dry
weight basis) and adjusted with jointed spike rush decomposed at
N:P ratio 2.5:1 at three week intervals. Another pond where urea
a nd triple superphosphate were added weekly at N:P ratio 1.25:1,
the final fish harvest was estimated 659 kg/ha/yr . |
| Year | 1992 |
| 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 | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Lin, Chang Kwei ;Edwards, Peter |
| Examination Committee(s) | Yakupitiyage, Amararatne; |
| Scholarship Donor(s) | German Academic Exchange Service (DAAD ) ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1992 |