Supplementation with vitamin C in the diet for Pimelodus britskii larvae

Abstract

This study aimed to evaluate the influence of dietary supplementation with vitamin C on the development of “mandi-pintado” larvae (P. britskii). A total of 160 larvae was distributed in a completely randomized experiment in 20 aquaria of 8L (1 larvae.1L-1). The diets were formulated to be isonitrogenous, isocaloric, isoaminoacídic and isofibrous supplemented with 0, 250, 500, 1,000, and 2,000 mg vitamin C by kg of diet. The larvae were fed to apparent satiation for 30 days, 4 times daily at 8h, 11h, 14h and 17h. The dissolved oxygen, pH and conductivity of the water were measured once a week. There was no significant difference in the performance of larvae regarding final weight (FW), final length (FL), and survival (S). These results indicate that the level of vitamin C in the non-supplemented treatment was enough to attend the species requirement. Keywords: Performance, nutrition, native fish, fish farming.