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008 100601s2009 th uu|m rtt 0| a1eng d
035 _a.b12077707
099 9 _aAIT Thesis no.AQ-09-12
100 0 _aTruong Minh Ut
245 1 2 _aA comparison of trash fish based feed with commercial pellet for Anguilla marmorata Quoy & Gaimard, 1824 at different stocking densities
260 _aPathum Thani, Thailand :
_bAsian Institute of Technology,
_c2009
300 _a1 online resource (58 leaves)
490 1 _aThesis ;
_vno. AQ-09-12
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, 2009
520 _aThe study was conducted at Tan Thanh village, Ca Mau province from September to December of 2008 in order to determine technical and economic of eel culture and comparison the growth of eel based on different stocking densities and kind of feeds. Sixty eel farmers were interviewed about technical and economic and constraints of eel culture. The experiment was setup in two factorials such as tilapia trash fish and commercial feed at 3, 6 and 9 ell/m² of stocking densities with three replicates in complete block design to investigate the daily weight gain (DWG), specific growth rate (SGR) of eel and feed conversion ratio (FCR). The result showed that the eel farmer was rice farmer formerly and has averaged 2.5 years in eel culture. Almost (100%) eel was fed by trash fish, and the commercial feed was tested on eel culture. The stocking density was averaged 0,47 eel/l m² of wild seed, tilapia trash fish and average 14.3 months of period culture, the eel pond culture gives 87% of survival rate, 0.48 kg/l m² of yield, 12.7 of FCR, 80% of feed cost in total production cost, US$44,3/1 m² of net income and 1.1 of NI/TC ratio. The higher stocking density leads to getting more yield and net income. However, the cost investment efficiency is the same as in different stocking density. Eel farmer face on the difficulties such as lack of trash feed and freshwater in dry season, commercial feed technology do not adapt to eel culture at high price and lack of wild seeds in dry season. In comparison within DWG, SGR and wet matter FCR based on kind of feed and stocking density, there are no interaction between feed type and stocking density, no different among different stocking densities, but these indices of using commercial feed is significant higher than tilapia trash fish. There are interaction between feed type and stocking density in comparison of dry matter FCR and feed cost. Economic effect of FCR in (dry matter) of trash fish is best at stocking density of 6 fishes/m² at FCR and feed cost also the same as. Specific pellet feed for eel culture should be studied to reduce trash fish and improve nutrient utilization. The water supply system should be improved to adapt requirement of eel culture in this area. Technology of producing hatchery eel seed is needed to be developed to satisfy seed demand of eel farmer actively to increase economic efficiency.
650 0 _aAnguilla (Fish)
_xFeeding and feeds
700 1 _aYakupitiyage, Amararatne,
_eChairperson
700 1 _aEbbers, Theo,
_eExamination Committee
700 1 _aGallardo, Wenresti G.,
_eExamination Committee
710 2 _aIFP - Ford Foundation,
_eScholarship Donor
710 2 _aAIT Fellowship,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. AQ-09-12
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B01787
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