Evaluation of potential for water hyacinth leaf protein concentrate as a protein source in tilapia feeds : a case study in Pak-Phanang Southern Thailand | |
| Author | Ong Moc Quy |
| Call Number | AIT Thesis no.AQ-08-18 |
| Subject(s) | Water hyacinth as feed Tilapia--Feeding and feeds |
| Note | A thesis submitted in partial fulfillment of the requirem ents for the degree of Master of Science in Aquaculture and Aquatic Resourc es Management, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-08-18 |
| Abstract | Leaf protein concentrate extracted from water hyacinth (WH -LPC) was regarded as potential plant protein to supplement in tilapia feed through tw o trials. In trial 1, WH-LPC was extracted by acid and heat coagulated method at acidifi cation at pH lower than 4.0, thermal precipitation at 50 0 C and rinsing with water. The WH-LPC obtained was evaluate d for conversion rate as well as gross composition. In trial 2, to determine alternative level of WH-LPC to soybean in formulated feed for tilapia cage culture. There were seven treatments that included commercial feed and six replacing level of WH-LPC 0%, 5%, 10%, 15%, 20% and 25% crude protein in formulated feed containing 3 0 % crude protein. Nile tilapias ( Oreochromis niloticus ) (average weight 8.0 g) were stocked at 30 fish per cage. The trials were designed by randomized complete block de sign. The result of trial 1 shown that LPC and protein yields obtaine d 0.047g dry matter and 0.017g crude protein 100 g -1 fresh water hyacinth biomass, respectively or 0.43 g dry matter and 0.15 g crude protein 100 g -1 fresh leaf water hyacinth respectively. In addition, proximate compositions of WH-LPC were analyzed at 35.99% crude prot ein, 1.49% crude lipid, 8.89% ash and 12.69 % crude fiber. The result of trial 2 presented that WH-LPC could completel y substitute soybean meal in tilapia formulated feed and replacing level of WH-LPC up to 15% crude protein that could give better growth performance, survival rate and efficienc y of protein of Nile tilapia. However, fish fed diets containing most of plant protein wer e less growth performance, efficiency of feed utilization and economic efficiency tha n fish fed commercial feed (P<0.05). In summary, using WH-LPC as protein sources in tilapia feed was remarked to be uneconomical efficiency, but it contributed a greatly role in i mproving environment, supplying protein sources and creating new jobs to improve livelihood for local people. |
| Year | 2008 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-08-18 |
| 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) | Somsak Boromthanarat;Gallardo, Wenresti G.;Bhujel, Ram Chandra |
| Scholarship Donor(s) | Swedish International Development Agency (Sida) |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2008 |