Chitosan efficiency to reduce the number of bacteria in white shrimp larvae, Litopenaeus vannamei, culture | ประสิทธิภาพไคโตซานเพื่อลดแบคทีเรียรวมในการเพาะเลี้ยงลูกกุ้งขาวแวนนาไม
2009
Ong-ard Lawhavinit(Kasetsart University, Bangkok (Thailand). Faculty of Veterinary Medicine) | Narong Abking(Kasetsart University, Bangkok (Thailand). Faculty of Veterinary Technology) | Wara Tapahudee(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries) | Suntaraporn Limsakoon(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries)
This study used chitosan to improve the water quality for white shrimp larvae. Chitosan is produced from shrimp and crab shell and has been found to inhibit the growth of bacteria. The results showed that no adverse effects were observed after using 0.1 percent chitosan. The water quality variants were: water temperature 27.20 +- 0.00 - 32.90 +- 0.00 deg C, salinity 16.80+-1.56-31.00+-0.00 ppt, pH 7.81+-0.06-8.07+-0.00, DO 6.2+-0.00-7.10+-0.57 ppm, ammonia 0.219+-0.00-4.12+-0.46 ppm, and nitrite 0.03+-0.001-1.13+-1.11 ppm. The average survival rate of the larva treated with chitosan was 39.30+-24.68 percent, while the untreated larva showed a higher mortality of 26.07+-19.05 percent. But, the average weight of treated larva was 0.011+-0.004 g., which was less than half that of the untreated treated larvae, at 0.023+-0.011 g. However, the results showed that the 0.1 percent chitosan successfully reduced the number of bacteria in shrimp larva water culture. Therefore, the introduction of chitosan to nursing white shrimp larva to prevent luminescence bacteria disease, instead of taboo antibiotics, is a more practical option.
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