| Author | Use of boiled soybean in feed for Nile tilapia |
| Call Number | AIT Thesis no. AE-87-39 |
| Subject(s) | Tilapia
Fishes--Feeding and feeds
|
| 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 present study was conducted to investigate the utilization of
cooked soybean as dietary protein source in pelleted feeds for the Nile
tilapia ( Oreochromis niloticus ). Dehulled, dry soybean seeds were
boiled at 100 °c for one hour to inactivate the activity of the trypsin
inhibitor. More than 80% of the trypsin inhibitor activities present
in soybean seed were inactivated by boiling. The boiled and unboiled
soybean seed were dried and ground into meals. These two meals and
defatted soybean meal wholly or in combination were included as
ingredients in feeds. The experimental diets contained 30% crude
protein with graded levels of trypsin inhibitor activity achieved by
varied combination of boiled and unboiled soybean. The fish were fed
a fixed daily ration (5% of body weight, on a dry weight basis) for
70 days. A recirculating water system was adopted and natural food
production was eliminated by housing the entire growing units under a
covered shelter. Significantly different growth responses ( P<O. 05)
were observed after the first two weeks of feeding and these trends were
maintained throughout the feeding trial. Experimental feeds containing
boiled soybean improved feed conversion efficiency as indicated by the
remarkably decreased food conversion ratio as well as significantly
increased protein efficiency ratio, digestibility and crude lipid of
final carcass composition. No significant differences of crude protein
of final carcass composition were, however, found among fish fed diets
containing soybean protein. Boiling could be adopted to inactivate
the trypsin inhibitor in soybean. Boiled or defatted soybean could be
used as a dietary protein source in pelleted feed for 0. niloticus at
a level of 50% of diet. |
| Year | 1987 |
| 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) | Wee, Kok Leong
; |
| Examination Committee(s) | Edwards, Peter ;Lin, Chang Kwei; |
| Scholarship Donor(s) | DAAD, the Federal Republic of Germany; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1987 |
