Optimizing Live feed and Weaning Strategies on Growth and Survival of Mystus cavasius Larvae in Captivity

The study describes the performance of Mystus cavasius larvae by feeding live feeds and weaning time of larval feed during their rearing. The larvae of three days old were fed Artemia nauplii, tubifex worm and mixed plankton in triplicate tanks. Tubifex worms were identified as the most effective live feed among the three live feeds evaluated. It significantly (P<0.05) enhanced the larval growth (179 mg) and survival (97%) compared to Artemia nauplii and mixed plankton. The yolk sac absorbed larvae of 3 days old were also stocked in 12 tanks and were fed Artemia naupli. The live feed was withdrawn at the age of 10, 15 and 20 days and fed compound larval feed to know the best age for feeding the larvae with compound feed. A weaning age of 15 days post-hatching (dph) was optimal, facilitating the transition to formulated feed. It significantly enhanced the survival rate compared to the larvae fed with compound feed at the age of 10 dph. These findings may be a framework during large-scale seed production in hatchery. Hence the present study addresses the feeding management in larval rearing of this nutritionally significant species.