000 04401nas a2200433 a 4500
005 20260817173409.0
008 200114s2017 th ar ||| 000 eng d
035 _a.b12311169
099 9 _aAIT Thesis no.AQ-17-05
100 0 _aNatthida Thammakirati
245 1 0 _aComparative study of zooplankton dynamics and gut contents of tilapia fingerlings in biofloc and aquamimicry systems
260 _aPathum Thani, Thailand :
_bAsian Institute of Technology,
_c2017
300 _a1 online resource (68 leaves) :
_bill.
490 1 _aThesis ;
_vno. AQ-17-05
500 _aA 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
502 _aThesis (M.Sc.) - Asian Institute of Technology, 2017
520 _aPresent 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.
650 0 _azooplankton
650 0 _aFishes
_xGrowth
700 1 _aBhujel, Ram C.,
_eChairperson
700 1 _aSalin, Krishna R.,
_eExamination Committee
700 1 _aYakupitiyage, Amararatne,
_eExamination Committee
710 2 _aRoyal Thai Government Fellowship,
_eScholarship
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. AQ-17-05
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B01827
907 _a.b12311169
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_cm
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962 _a000:001:PDF:b1231116:004493:0:0:0:0:0:0
_tAbstract
_vn
945 _lmnait
945 _lmnait
945 _lmnarc
942 _c40
942 _c20
909 _aBarcode : 30050120878763
_bCREATED : 2019-05-31
_cRECORD # : i13190519
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_eLCHKIN : -
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_bCREATED : 2020-01-14
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