| Author | Niyom Wongyai |
| Call Number | AIT Thesis no.AQ-08-20 |
| Subject(s) | Snail farming
|
| Note | A thesis sub mitted in par tial fulfillm ent of the req uirem ents for the degree of Master of Science in Aquacultu re and Aquatic Resources Management, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-08-20 |
| Abstract | Two experim ents were conducted to evaluate th e effect of varying di etary protein levels and ingredient com position on growth, survival and food conversion ratio (FCR) of spotted babylon ( Babylonia areolata ). The first feeding trial was c onducted with snails with initial average size of 1.66 ± 0.69 m m in shell length and 7.14 ± 2.37 m g in weight for 45 days. Diets containing five dietary protein levels, i.e. 15, 20, 25, 30 and 35%, were fed to snails (10,000 individuals /m 2 ) two tim es a day and fresh fish was used as the control treatm ent. It was found that fresh fish m eat fed snails had highest gr owth and lowest FCR (in DM basis) but they were not si gnificantly different (P>0.05) fr om the snails fed with 35% protein diet. W hen considering form ulated di ets, 35% protein diet was the highest of growth rate of 2.91±0.13 m gday -1 and 0.176± 0.002 m mday -1 respectively in which it was greater significant difference (P<0.05) in shell length than others. In addition, 35% protein diet fed snails has highest specific growth rate (SGR) both in body weight and in shell length of 6.68± 0.99 and 4.12± 0.37% respec tively. FCR (as fed basis) was not significantly difference (P>0.05) of snails fe d with either fresh fish m eat (1.77), 30% protein (2.42), or 35% protei n diets (2.29). Dietary protein level had no significant (P>0.05) effect on the survival rate (33.83- 42.94%). The second experim ent was conducted using sn ails with an averag e size of 1.38 ± 0.59 m m in shell length and 4.17 ± 0.53 m g in body weight . Snails were fed two tim es a day (10,000 individuals /m 2 ) with five form ulated diets with dietary protein level ranging from 33.21% to 35.01% for 45 days. The treatm ents were: (1) no soybean m eal, (2) 10% soy bean m eal with 15% rice bran, (3) 10% soy bean with 20% rice bran, (4) 10% soy bean m eal with 25% rice bran and (5) 10% soy bean m eal with 30% rice bran supplem ent. Growth rate and specific growth rate (SGR) we re ranged from 1.75- 2.14 m gday -1 and 6.33-7.13 %BW / day, respectively. The corresponding length-wi se growth rate and SGR were 0.133- 0.147 mmd ay -1 and 3.59-3.96% respectively. There were no significant (P>0.05) differences in length-wise and body weight SGR but SGR based on total body weight (P<0.05) were significantly different. No si gnificant differences (P>0.05) were observed in the m ean survival rate of snails (25.67-27.50%). Diet 3 which com posed 10% soybean m eal and 20% rice bran supplem ent had the best of FCR (1.88 on DM basis). Experim ental results show that the protein re quirem ent of spotted babylon can be satisfied by artificial diet containing 35% dietary protei n without any negative effect on the growth, survival rate and FCR. The growth and survival rated of snails were not influenced by the diets m ade of different ingredient com positions. However, ingredient com position significantly affected FCR. |
| Year | 2008 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-08-20 |
| 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) | Bart, Amrit;Gallardo, Wenresti;Nilnaj Chaithanawisuthi |
| Scholarship Donor(s) | Thailand (HM Queen) |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2008 |