TY  - SER
AU  - Natthida Thammakirati
AU  - Bhujel,Ram C.
AU  - Salin,Krishna R.
AU  - Yakupitiyage,Amararatne
ED  - Royal Thai Government Fellowship,
TI  - Comparative study of zooplankton dynamics and gut contents of tilapia fingerlings in biofloc and aquamimicry systems
T2  - Thesis
PY  - 2017///
CY  - Pathum Thani, Thailand
PB  - Asian Institute of Technology
KW  - zooplankton
KW  - Fishes
KW  - Growth
N1  - 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; Thesis (M.Sc.) - Asian Institute of Technology, 2017
N2  - Present   experiment   was   conducted   in   tilapia   hatchery   of   AIT,   Thailand   during   13 December  2016  to  14  February  2017  to  compare  the  growth  of  zooplanktons  andtheir composition,  and  thereby  the  survival  of  Nile  tilapia  (Oreochromis  niloticus)  fry  in Aquamimicry  and  Biofloc  systems.  Zooplankton  populations  were  observed  under  active suspension  systems  by  adding  different  carbon  sources  before  the  fry  were  stocked  and throughout the experimental period as to control C:N ratio. In biofloc system (BS) tapioca starch was added as a carbon source and in aquamimicry system (AS) fermented rice bran was used. In   Aquamimicry   system   higher   (p<0.05)   population   of   zooplankton   was   observed compared  with  Biofloc  with  linearly  rising  trend  but  sharply  increased  during  the  last period  of  the  experiment  in  Biofloc.  A  total  of  24  species  of  zooplankton  were  found  in aquamimicry  and  21  species  in  biofloc,  Rotifera  (58%  and  70%,  respectively)  was  the dominant  group  species,  followed  by  Protozoa  (38%  and  23%,  recpectively),  Copepoda (<1% in both systems) and Cladocera (<1% in both systems).In  Aquamimicry  zooplankton  population  was  associated  with  DO,  NO2,  NO3,  TSS,  VSS, phytoplanktondensity  and  floc  volume  but  regression  analysis  showed  only  the  volatile suspended  solid  (VSS)  had  direct  effects  on  zooplankton  density.  In  Biofloc  system,  DO, NH3,  NO2,  NO3,  TSS,  starch  addition  and  floc  volume  had  association  with  zooplankton population but regression analysis showed only the TSS had direct effects on the density of zooplankton.  No  significant  differences  in  density  and  species  of  zooplankton  of  the  fish guts were found.Average stocking size of Nile tilapia fry was 0.173±0.004g) and average final weights 3.82 ±  0.44  and  3.01  ±  0.23g  for  aquamimicry  and  biofloc  systems  respectively,  with  specific growth  rates  (SGRs)  of  5.6%  and  5.18%  respectively.  Average  survival  rates  were 53.03±1.60  and  57.4±1.98  for  aquamimicry  and  biofloc  systems.  However,  these  growth rates and survival were not significantly (P>0.05) different between the two systems
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B01827
ER  -