Dietary Administration of Stable Vitamin C enhances Growth and Resistance of Postlarvae of Tiger SHrimp Penaeus Monodon against Vibrio Anguillarum

By : Nathan Felix , M. Rosalind George , C. John Weslykirubakaran , M. J. Prince Jeyaseelan

Page No: 1-8

Abstract
An investigation was carried out to study the effect of administration of stable vitamin C on the growth and disease resistance of Penaeus monodon through feeds. Three feeds were prepared by supplementing stable vitamin C at 0.05, 0.15 and 0.25% concentrations along with unsupplemented contol. The postlarval shrimps were fed with experimental diets for a period of 60 days under laboratory conditions. Among the diets examined, stable vitamin C incorporated diet at a concentration of 0.25% showed higher growth (weight gain of 0.130±0.01 g) and SGR (2.836±0.01). In the disease resistance study, after 60 days growth period, the shrimps were challenged with bacterial strain Vibrio anguillarum. The survival rate was recorded for the challenge period of 10 days. The shrimps fed the stable vitamin C added siet at 0.15% and 0.25% concentrations showed maximum disease resistance in terms of higher shrimp survival rate of 66.67% whereas in control it was only 16.67%. Considering the cumulative effects of growth and disease resistance in shrimps, stable vitamin C at a concentration of 0.25% gave best results.

Authors :
Nathan Felix, M. J. Prince Jeyaseelan, C. John Weslykirubakaran and M. Rosalind George
Department of Aquaculture, Fisheries College and Research Institute, Thoothukudi-8