Alpinia galanga Extracts for Improving Egg Hatchability and Larval Viability of Catfish

Abstract

This research aimed to investigate the extract of the leaves and rhizomes Alpinia galanga as a potential compound and also to find the optimal concentration for improving egg hatchability and larval viability of catfish. Dried leaves and rhizomes of A. galanga were macerated and extracted with water and ethanol extracts. The extracts in concentration 600, 800 and 1,000 ppm were tested on the egg hatchability of catfish with immersion method, and challenge test with Aeromonas hydrophyla, Pseudomonas sp., and Saprolegnia spp. Next, the concentration of 800, and 1,000 ppm were tested on the larvae of catfish with immersion method and followed by challenge test with several pathogens. The result showed that water or ethanol extracts of A. galanga can improve egg hatchability with a value of 62.3±1.4 to 97.7±1.0 %, and larval viability of catfish of 69.4±1.0 to 90.7±2.2%. Eight hundred ppm ethanol extract of A. galanga rhizome has the best egg hatchability, and 1,000 ppm can improve the larval viability of catfish.