Menasveta, P., Chaiyanetr, N., Piyatiratitivorakul, S., Kittakoop, P.-1997
In: Shrimp Biotechnology in Thailand. Flegel, T.W., Menasveta, P. and Paisarnrat, S. (Eds), BIOTEC Publ 2/2540, 1997, 244 pp.
Abstract:
Two experiments were conducted to study the effect of micro-nutrient supplementation on yellow-head disease (YHD) resistance in Penaeus monodon postlarvae. In Experiment I, postlarvae 15 (PL-15) were fed with a commercial basal diet with and without factorial supplements of choline, astaxanthin, ascorbic acid, and highly unsaturatered fatty acids (HUFAs) in fish oil at concentrations of 600, 200, 2,000 ppm and 3%, respectively. After feeding for 30 days, these groups of prawns were fed with meat from shrimp infected with yellow-head. The results showed that the groups fed with micro-nutrient supplemented feeds showed a tendency for increased disease resistance. In Experiment 2, PL-15 were fed with 5 diets including a commercial basal diet and the basal diet supplemented with vitamin C, astaxanthin + egg, and fish oil at the same concentrations as Experiment I. Feeding rates were 5 times a day, and the shrimp were fed for 45 days. After this, the prawns were challenged with YHD by co-habitation with disease prawns. Results showed that the control group fed with a basal diet died earlier than the other groups. In summary, the results of these two experiments suggested that supplementation with the three micro-nutrients (vitamin C, astaxanthin, and HUFAs) had a prophylactic tendency YHD.
(National Center of Genetic Engineering anf Biotechnology, Marine Biotechnology Research Unit, c/o Aquatic Resources Research Insitute, Chulalongkorn University, Bangkok 10330)
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