TY  - SER
AU  - Ong Moc Quy
AU  - Yakupitiyage,Amararatne
AU  - Somsak Boromthanarat,
AU  - Gallardo,Wenresti G.
AU  - Bhujel,Ram Chandra
ED  - Swedish International Development Agency   (Sida), 
TI  - Evaluation of potential for water hyacinth leaf protein concentrate as a protein source in tilapia feeds: a case study in Pak-Phanang Southern Thailand
T2  - Thesis
PY  - 2008///
CY  - Pathum Thani, Thailand
PB  - Asian Institute of Technology
KW  - Water hyacinth as feed
KW  - Tilapia
KW  - Feeding and feeds
N1  - 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; Thesis (M.Sc.) - Asian Institute of Technology, 2008
N2  - 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
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B01764
ER  -