| Author | Suttisak Boonyoung |
| Call Number | AIT Thesis no.AQ-09-02 |
| Subject(s) | Tilapia--Feeding and feeds Evaluation
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| 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-09-02 |
| Abstract | Plant protein meals supplement with crystalline lysine can efficiently replace fishmeal in fish feeds. However, crystalline lysine is not stability in water and it has different sources in commercial grades. The purpose of this study is to determine the efficiency of supplementation and digestibility of different sources of crystalline lysine for Thai red tilapia. In experiment I, five diets were formulated with isoproteic (30 % crude protein) and isocaloric (12.8 MJ.kg⁻¹ of digestible energy). Fishmeal based diet and soybean meal based diet without crystalline lysine supplement were two control groups. Three sources of crystalline lysine (L-Iysine HC1, L-Iysine S0₄ and slow release lysine) were tested by supplemented in soybean meal based diets. Each diet was fed to three groups of 20 Thai red tilapia fingerlings until satiation for 56 days with initial weight at 6.06 ± 0.16g.fish⁻¹. In experiment 2, three sources of crystalline lysine were determined digestibility by using 0.5% chromic oxide as a marker. The results in experiment 1 showed that fish performance were different in fishmeal based and soybean meal based diet without crystalline lysine supplement (P<0.05) and fish growth performances were improved when L-lysine HC1 was supplemented in soybean meal based diet (P>0.05). Although, feed intake was affected fishmeal content in the diet (P<0.05) but feed efficiency were not different among treatment (P>0.05). However, fish fed with L-Iysine SO₄ were reducing in growth rate when compare with L-Iysine HC1 and fish growth performances were not different between L-Iysine HC1 and slow release lysine. In experiment 2, the results showed that Thai red tilapia can completely digested three sources of crystalline lysine (100% apparent digestibility coefficient). This study suggested that fishmeal can be completely replaced with soybean meal supplemented L-lysine HC1 without adverse affect on Thai red tilapia growth performances. |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-09-02 |
| 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) | Yakupitiyage, Amararatne |
| Examination Committee(s) | Bart, Amrit;Gallardo, Wenresti |
| Scholarship Donor(s) | The Royal Thai Government (RTG Fellowship) |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2009 |