Effect of mineral supplementation on survival and growth of pacific white shrimp (Litopenaeus vannamei)
2011
Wassana Prisingkorn(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries. Department of Fishery Biology. Aquaculture Business Research Center) E-mail:[email protected] | Chalor Limsuwan(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries. Department of Fishery Biology. Aquaculture Business Research Center) | Niti Chuchird(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries. Department of Fishery Biology. Aquaculture Business Research Center) | Idsariya Wudtisin(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries. Department of Fisheries Management) | Kesinee Laisutisan(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries. Department of Fishery Biology. Aquaculture Business Research Center)
Effect of mineral supplementation on survival and growth of Pacific white shrimp (Litopenaeus vannamei) were studied. This study was divided into two experiments. The first experiment was consisted of five groups, (1) control group, (2) Mg : Ca ratio 30 : 10 ppm, (3) Mg : Ca ratio 90 : 30 ppm, (4) Mg : Ca ratio 180 : 60 ppm and (5) salt 50 g/1 kg of feed. Shrimp weight 3-4 g were stocked into 500-L fiberglass tanks at the density of 35 shrimps per tank (63 shrimps/ square m) and salinity was 25 ppt. After 60 days shrimp were harvested. The average weight, yield and average daily weight gain(ADG) from group 5 were significantly higher (P LT 0.05) than the control and other groups. While survival rate from all groups were not significantly different (P GT 0.05). According to the first experiment, salt 50 g/1 kg feed gave the best result. In the second experiment, salt at two different concentrations was used and compared with the control group, (1) control group, (2) NaCl 25 g/1 kg of feed and (3) salt 50 g/1 kg of feed. The rearing procedure was similar to the first experiment except the stocking rate was 45 shrimp per tank (81 shrimp/ square m) This experiment were cultured same the first experiment but shrimp were stocked at the density of 45 shrimps per tank (81 shrimps/ square m). After 60-day of rearing period, salt 50 g/ 1 kg feed showed the highest yield than other groups. However, there was no significant differences of yield and average daily gain across the groups. While survival rate from control group was significantly lower (P LT 0.05) than group 2 and 3.
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