Eggs and Pre Larvae Development for Humpback Grouper, Cromileptes altivelis, (Valencee) Larvae

Abstract

This experiment were conducted to determine the embryonic and pre-larvae development for humpback grouper, Cromileptes altivelis, under controlled condition. The above study was carried out from spawning of broodstocks to obtain the fertilized eggs till fully yolk sac and oil droplet absorption. The results showed that the mean diameter of humpback grouper egg was 828.69  45.91 m. The fertilized eggs hatched in 20 hour 10 minutes at the temperature of 27 to 28o C. The hatched larvae had a mean length of 1.86 mm, and a mean height of 0.460 mm. The yolk sacs and oil droplets were totally utilized after 63 and 65 hour after hatching (HAH), respectively. One day larvae had an average length and height of 2.253 mm, and 0.615 mm, respectively.