ผลของการเสริมวิตามินซีต่อการเติบโต การรอดชีวิต และความทนทานต่อการเปลี่ยนแปลงความเค็มของหอยหวาน Babylonia areolata / ธิติภพ สุขุมาลชาติ = Effects of vitamin C supplementation on growth, survival and tolerance to salinity change of spotted babylon Babylonia areolata
This study was conducted to investigate the effects on growth, survival and tolerance to low salinity of juveniles spotted babylon (Babylonia areolata) fed experimental diet supplemented with various levels of vitamin c (ascorbyl-2-polyphosphate; APP). Juveniles spotted babylon with initial shell length and body weight of 1.13 ± 0.11 cm and 0.29 ± 0.10 g per individuals respectively were reared in plastic tanks of 30 x 48 x 17 cm³ supplied by the semi-closed recirculating seawater system. They were fed with semi-moisture diet supplemented with 6 levels of vitamin c (0, 50, 100, 500, 1,000 and 2,000 mg per 1 kg diet) for 5 months. Results showed that there were no significant differences in growth rate in shell length and body weight and feed efficiency among all groups of juveniles spotted babylon fed with diet supplemented with 6 levels of vitamin c (P>0.05) with the exception of survival rates. Juveniles fed with diet supplemented with vitamin c (500 mg per 1 kg diet) had the highest survival rate (P<0.05) as compared to the snails fed on diet supplemented with vitamin c at 0 and 50 mg per 1 kg diet but not significance for those of 100, 1,000 and 2,000 mg per 1 kg diet. In addition, the results of low salinity (20 ppt) stress test showed that the spotted babylon fed with formulated diets supplemented with 6 levels of vitamin c for 1 and 5 month had no significant differences (P>0.05).