| Author | Theerawat Samphawamana |
| Call Number | AIT Thesis no.AQ-09-09 |
| Subject(s) | Catfishes--Feeding and feeds
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| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Science in Aquaculture Technology, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-09-09 |
| Abstract | Stinging catfish (Heteropneustes fossilis) is an economically important freshwater fish in Southern Thailand. High market price of this air-breathing fish makes an ideal candidate for aquaculture. The breeding technique for stinging catfish has been successfully developed but mortality of fish larvae during weaning to dry feed is high. This study, therefore, was conducted to identify a suitable type of live feed (Experiment 1), develop a method for weaning fish to artificial dry feed (Experiment 2), and to determine an optimum stocking density for nursing acclimated fish fry (Experiment 3) The first experiment had 4 treatments i.e. first feeding fish larve was fed with (T1) rotifer, (T2) Artemia, (T3) Moina, and (T4) rotifer (1 st week) + Artemia (2nd week) + Moina (3rd week). The experiment was conducted for 21 days. The results showed that the survival rate of fry fed Moina (86.87±1.8%). Artemia (84.06±3.l %) and live feed combination (83.81±3.0%) was similar (p > 0.05) and the fry fed rotifers had the lowest survival rate. Fry fed Moina had the highest final mean weight (FMW), daily weight gain (DWG) and Specific growth rate (P < 0.05). Based on the survival rate, growth rate and convenience, Moina was selected as the live feed item for the 2nd experiment. The second experiment was conducted for 30 days. First feeding fish larvae were fed with combinations of Moina and commercial feed (Thai luxe company: pellet No 1 and No 2) combinations i.e. 100% Moina; 20:80; 40:60; 60:40; 20:80; and 100%. Each combination was presented fish 1, 2, 3 and 4 day intervals and compare with two control treatments i.e. moina only dry feed treatments. The results showed that survival rate, FMW, FML, DWG, and SGR of fish larvae fed a particular combination for 3 and 4 days before moving into the next combination had no significant difference (p>0.05) from live feed control. The third experiment to evaluate the optimum stocking density was conducted using 30-day old post-weaned H fossilis fry for 60 days. Fish fry were stocked at a rate of 4, 6, 8, 10, and 12 fry L⁻¹. The results showed that survival rate, FMW and FML offry reared at 4,6, 8 fry L⁻¹ stocking densities had no significant differences (p> 0.05). In conclusion, in terms of growth, survival, convenience, and availability, Moina is the best live feed for H fossilis larval rearing at the first stage. The fry should be fed for a minimum of 3 days of a particular feed combination that gradually increases % of dry feed and reduces % Moina during the weaning process to ensure smooth transition to 100% dry diet. The optimum stocking densities for rearing post-weaned H fossilis fry in recirculation tanks for 60 days is 8 fry L⁻¹ |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-09-09 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Aquaculture and Aquatic Resources Management (AQ) |
| Chairperson(s) | Yakupitiyage, Amararatne |
| Examination Committee(s) | Gallardo, Wenresti G.;Bart, Amrit |
| Scholarship Donor(s) | Ministry of Agriculture and Cooperatives |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2009 |