02357cas a2200253 a 450000500170000000800410001703500150005810000180007324501510009126000520024230000100029449000270030450001520033150200570048352012410054065000300178165000090181170000380182070000440185870000450190271000320194781000590197985600650203820260817173442.0110920s1989    th uu|m rtt   0|  a1eng d  a.b100257901 aShao, Qingjun12aA comparison of grass carp (ctenopharyngodon idella) and puntius (puntius gonionotus) using paragrass (brachiaria mutica) as the primary feedstock  aBangkok :bAsian Institute of Technology,c1989  a89 p.1 aThesis ;vno. AE-89-53  aA thesis submitted in partial fulfillment of the requirement for the Degree  of Master of Science, School of Environment, Resources and Development  aThesis (M.Sc.) - Asian Institute of Technology, 1989  aTwo herbivorous fish, grass carp (Ctenopharyngodon idella) and puntius  (Puntius gonionotus) were compared in separate common polycultures of Nile  tilapia (Oreochromis niloticus), common carp (Cyprinus carpio) and snakehead  (Channa striata) over a period of 7 months. Stocking rates were 1 fish/m2 for  grass carp, puntius and Nile tilapia, 0.25/m2 common carp and 0.05/m2  snakehead.  There were two replicates for each treatment. All ponds were  fertilized with buffalo manure, urea and triple superphosphate at the same  rate. Feedstock was rice bran for first 2 months and chopped paragrass for  the last 6 months of the experiment.  After 7 months, the individual body weights of grass carp and puntius  increased 337 g and 83 g, respectively. The mean daily weight gain of grass  carp which was 1.60 g/fish/day is 4 times that of puntius, which was only  0.4 g/fish/day. The total net extrapolated yields of grass carp and puntius  were 2205 and 1233 kg/ha/year respectively. Grass carp had an extremely  low survival rate (38%> comparing to the survival rate of puntius which was  83%.  The extrapolated net yield of fish from the polyculture of grass carp  and puntius were 5,460 kg/ha/year and 3,941 kg/ha/year, respectively. 0aFishesxFeeding and feeds 0aCarp1 aGartner, Joseph A., eChairperson1 aLin, Chang Kwei,eExamination Committee1 aWaibel, Hermann, eExamination Committee2 aFrance, eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. AE-89-53  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B17904