Replacement of fishmeal by enzyme treated feather meal supplemented with methionine and lysine for red tilapia (Oreochromis niloticus x O. mosambicus) | |
| Author | Arissara Sopawong |
| Call Number | AIT Thesis no.AQ-10-08 |
| Subject(s) | Tilapia Methionine Lysine in animal nutrition Fishes Feeding and feeds |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Aquaculture and Aquatic Resources Management, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-10-08 |
| Abstract | Enzyme treatment feather meal i s an animal by -product with high protein contain but lacking in amino acids particularly lysine and methionine. However, enzyme treated feather meal can efficiently replace fish meal by supplementing with essential amino acids (lysine a nd methionine) . The purpose of this study is to evaluate the potential for replacing fish meal component of juvenile Thai red tilapia diet using enzyme treated feather meal (ETFM) as an alter native protein source. In experiment I, triplicate groups of fish (initial body weight 10.9+ 0.19 g/fish) were fed five isoproteic (32% crude protein) diets. Fish meal based diet and soybean based diet were the control diet (C) which contained 10% fish meal without supplem ented free amino acids, whereas in the diets D2, D3,D4 and D5 was replaced fish meal by 10% enzyme treated feather meal without supplementation of essential amino acids , supplemented with a single L -lysine, a single DL -methionine and c ombination of L -lysine HCl and DL - methionine, respectively by using the soybean based diet as the major protein source. Fish fed with di et C, D4 and D5 had higher final body weight (FBW), weight gain (WG), daily weight gain (DWG) and specific growth rate (SGR) ( P<0.05 ), and there is no significant difference among fish fed enzyme treated feather meal based diet ( P>0.05 ). Fish fed the control diet (C) had higher feed intake, feed conversion ratio (FCR) , but lower protein efficiency ratio (PER) than fish fed the diet 2 to 5 ( P<0.05 ). At the end of trial 1, survival rate was found 100% in fish fed with experimental diets ( P>0.05 ). In experiment II, ETFM digestibility was determine d by using 0.5% chromic oxide as an external indicator. The re sults of experimental II showed that the apparent digestibility coefficient (%) of crude protein and essential amino acid in reference diet (fish meal) was high (83.83% CP), but low i n ETFM (48.31% CP). Results of the study indicated that ETFM as fish meal alternatives has a high potential as feed ingredients by replacing fish meal supplemented with a single DL - methionine without growth retardation. Moreover, ETFM is a good protein source, and this source is economi cally superior to fish meal and feed costs can be substantially reduce d with the replacement of ETFM in the diets of Thai red tilapia and possibly in the diets of other cultured fish species. |
| Year | 2010 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-10-08 |
| 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 | Aquaculture and Aquatic Resources Management (AQ) |
| Chairperson(s) | Amararatne Yakupitiyage |
| Examination Committee(s) | Wenresti Gallardo;Dhirendra P . Thakur |
| Scholarship Donor(s) | Thailand (HM Queen) |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2010 |