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008			110920s1989 th uu|m rtt 0| a1eng d
035			_a.b10260870
099		9	_aAIT Thesis no. AE-89-30
100	0		_aMarnop Chaengkij
245	1	0	_aEvaluation of monosex tilapia production in ponds with different nutritional inputs
260			_aBangkok : _bAsian Institute of Technology, _c1989
300			_a77 p.
490	1		_aThesis ; _vno. AE-89-30
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of the Master o f Science, School of Environment, Resources and Development
502			_aThesis (M.Sc.) - Asian Institute of Technology, 1989
520			_aDifferent nutritional inputs were used to culture monosex Nile tilapia ( Oreoch romisniloticus ) with the same initial. individual mean weight of 5. 1 g in 200 m2 earth ponds for eighteen weeks. Four treatments with three replications each were used with the same fish stocking rate of 600 fish/pond <1:> follows: Treatment 1 , duck/fish integration; Treatment 2, buffalo manure and inorganic fertilizers (urea and triple superphosphate) with rice bran a supplementary feed given daily a t 2% of fish bod y weight; Treatment 3 , pelleted feed given initially <1t 2%/body weight /day and later at 3% of fish body weight; Treatment 4, no nutritional inputs. Mean dissolved oxygen concentrations (DO ) fell into two groups, manure d ponds (Treatments 1 and 2 ) and unmanaged panels (Treatment 3 a nd 4 ) . DO in manured ponds was lower at dawn and higher in the after noon than in unmanaged ponds , and these trends were nearly the same level through out the experimental period . Phytoplankton and zooplankton biomass were low in unmannered ponds but high in manured ponds ; l1 owever , they were higher in ponds loaded with duck manure than buffalo manure. Treatment 1gave the best result in terms of mean growth rate, mean specific growth rate , mean individual fish weight and net fish yield followed in decreasing order by Treatment 2,3 and 4 . There was no significant differences in survival rate be t ween the treatments , except in the control treatment with only 49. 8% survival rate . Using gross margin analysis , the economic results showed that only Treatment 1 gave a positive value with the others negative . Integration of duck/fish was an not an economical method eventhough it gave the best fish yield because of the financial loss of the duck enterprise. Using pelleted feed was also an uneconomical method but it could be economic if the feed price were reduced. No pond inputs was not economic due to high mortality and poor fish growth . Only the treatment using buffalo manure , inorganic fertilizers and rice bran as pond inputs may be economic and this strategy show potential for small-sca1c farmers.
650		0	_aTilapia
650		0	_aFishes _xFeeding and feeds
700	1		_aEdwards, Peter, _eChairperson
700	1		_aLin, Chang Kwei, _eExamination Committee
700	1		_aWaibel, Hermann, _eExamination Committee
710	2		_aCIDA, The Government of CANADA, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AE-89-30
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B17881
907			_a.b10260870 _bmnait _cs
902			_a240401
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909			_aBarcode : 30050003004263 _bCREATED : 1994-05-17 _cRECORD # : i10320738 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050003004255 _bCREATED : 1994-05-17 _cRECORD # : i1032074x _dLPATRON : 1014439 _eLCHKIN : 2001-11-19 _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 9 _jTOT RENEW : 0
909			_aBarcode : 30050120364491 _bCREATED : 2016-05-27 _cRECORD # : i1299795x _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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