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005			20260817173421.0
008			190315s2014 th ad ||| 000 0 eng d
035			_a.b12298475
099		9	_aAIT Thesis no.AQ-14-03
100	0		_aTran Anh Tuyet
245	1	2	_aA comparison among three stocking densities of Tilapia (Oreochromisniloticus) fry in an aquaponic system with lettuce (Lactuca sativa L.)
260			_aBangkok : _bAsian Institute of Technology, _c2014
300			_a1 online resource (63 p.) : _bill.
490	1		_aThesis ; _vno. AQ-14-03
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, 2014
520			_aA four-week trial on nursing of Nile tilapia fry was conducted at the Asian Institute of Technology, Thailand to compareamong the three stocking densitiesi.e. 500, 1,000 and 1,500 per 100 L tankin aquaponic system with lettuce (Lactuca sativa L.). Eachaquaponic system included a fish tank (100 L), a vegetable grow-bed (1 m2surface x 0.15 m water column) and a gravel bio-filter. The experiment consisted of three treatments in threereplicates. The first set of replicatesof all the treatment was carried out in first fourweeks period, and the second andthethird werecombinedin the following 4 weeks. Monosex tilapia fry of initial size 0.2 g were nursedin theaquaponicsystem with 9 lettuce plantsgrown in a floating raft in a grow-bed. The frywerefed with commercial feed (30% Protein content) three times daily usingfeeding rate gradually reduced from 10 to 7 % total weigh day-1following the increasing fish biomass. Results showed that there were significant differences among treatments in growth rate, feed conversion ratio and tilapia fry production (P < 0.05) but not in survival rate (P > 0.05). The fry grewfaster (5.32 ± 0.04 % day-1and 5.28 ± 0.04 % day-1respectively) when stocked at 500 and 1000 per tank densities as compared tothat at 1,500with 4.44 ± 0.10% day-1. FCR in Treatment3 was significant higher than that in Treatment2 and Treatment1 (2.01, 1.22 and 1.19 respectively) (P < 0.05). However, mean survival rate of each treatment were not significant different. It varied from 84.4 ± 2.0(%) in Treatment3 to 87.9 ± 1.2(%) in Treatment2. With regards to lettuce, the mean growth rate of lettuce in Treatment3 (12.5% day-1)and the Treatment2 (12.3 % day-1) werecomparable. However, the growth rate of lettuce in Treatment 1 was the lowest (10.8% day-1) (P < 0.05). Similarly,biomass yield of lettuce in Treatment3 (1.1kg)were comparable in Treatment2 (0.9 kg).These bothwere significantly higher than that in Treatment1 (0.6 kg). The highest profit (20.5%)was obtained from Treatment2 (110 Baht), which was significantlyhigher than the returncame from Treatment3 (58 Baht) and negative gain in Treatment1 (115 Baht).Therefore, it a density of 1000 fry per 100 litre of water is recommended. However, farmers have to use larger tanks of approximately 2,000 litre capacity and stock and sell 20,000 fry each month so that he/she can generate adequate income to support a family.
650		0	_aNile Tilapia
650		0	_aAquaculture
650		0	_aFishes _xFeeding and feeds
650		0	_aEcosystem management
650		0	_aNile Tilapia _xFeeding and feeds
650		0	_aAquaponics
700	1		_aSoni, Peeyush, _eChairperson
700	1		_aBhujel, Ram C., _eCo-Chairperson
700	1		_aYakupitiyage, Amararatne, _eExamination Committee
700	1		_aPantanella, Edoardo, _eExamination Committee
710	2		_aVietnam International Education Development(VIED) {u2013}MOET, Vietnam, _eScholarship Donor
710	2		_aAIT Fellowship, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AQ-14-03
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B01818
907			_a.b12298475 _bmnait _ct
902			_a240411
998			_b0 _c190315 _dm _ea _ft _g2
962			_a000:001:PDF:b1229847:003930:0:0:0:0:0:0 _tClick to view Abstract _vn
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