000			03785cas a2200409 a 4500
005			20260818154506.0
008			111005s1990 th uu|m rtt 0| a1eng d
035			_a.b10424908
099		9	_aAIT Thesis no. AE-90-27
100	0		_aJirachai Juntana
245	1	0	_aMass incubation of nile tilapia, Oreochromis niloticus in relation to its purposed introduction into Udonthani province
260			_aBangkok : _bAsian Institute of Technology, _c1990
300			_a74 p.
490	1		_aThesis ; _vno. AE-90-27
502			_aThesis (M.Sc.) - Asian Institute of Technology, 1990
520			_aAs one component of a two part study, a survey of tilapia fry production in Udonthani province found that all private fry producers mainly produced carps, mainly Silver barb (Puntius gonionotus), mrigal (Cirrhinus migrala) and Rohu (Labeo rohita) which approximately 79.5 percent total fry production. Only a half the farms accounted for produce tilapia due to the much lower production in producing tilapia fry than carps. In mass incubation experiments with Nile tilapia at AIT, the stocking density of seed were not observable effect on hatchability and did not relate to survival to swim- up fry, however the very high stocking density of seed obtained the better hatching rate. Atleast 58,677 seed (253.72 g . )/l can be successfully incubated by using the down-welling incubator made from plastic solf- drink bottle. There were not significantly different in hatchability and survival to swim-up fry but highly significant difference in weight of seed ,hatched fry and swim-up fry between broodfish classes (Small, Medium and large). Hatchability, hatched fry weight, swim-up fry weight and survival to swim- up fry were highly relationship to seed weight (r = 0.54, r = 0 . 84, r = 0.80 and r = 0.32 respectively.) and the weight of swim- up fry were also related to weight of hatched fry ( r = 0.81). Survival to swim-up fry were related to hatchability (r =0.34). Moreover there were highly significant difference in hatchability and ·survival to swim-up fry between seed stages, the greatest hatchability and survival to swim-up fry from stage 2.5. Hatchability were observable effect within the different broodfish management regime, in green water system had greater hatching rate than clear water system (P<0.05). However survival to swim-up fry were not related to the system design.
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of science, School of Environment, Resources and Development
650		0	_aTilapia
700	1		_aLittle, David C., _eChairperson
700	1		_aMachintosh, Donald J., _eExamination Committee
700	1		_aWaibel, Hermann, _eExamination Committee
710	2		_aOverseas Development Administration (British), _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AE-90-27
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B18253
907			_a.b10424908 _bmnait _cs
902			_a240401
998			_b2 _c951012 _dm _ea _fs _g0
945			_lmnait
945			_lmnait
945			_lmnarc
942			_c20
942			_c40
909			_aBarcode : 30050000058742 _bCREATED : 1994-05-18 _cRECORD # : i10530666 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050003005484 _bCREATED : 1994-05-18 _cRECORD # : i10530678 _dLPATRON : 1015284 _eLCHKIN : 2002-05-07 _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 2 _jTOT RENEW : 2
909			_aBarcode : 30050120363824 _bCREATED : 2016-05-27 _cRECORD # : i12999349 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
999			_c73585 _d73585