Observation of Morphological Development and Time of Initial Feeding in Pompano Fish Larvae, Caranx ignobilis, Forsskall) in support of Seed Production and Mariculture Development

Abstract

The study aims to determine pompano fish larvae’s initial feeding, critical period, and morphology development. The result showed that the broodstock fish spawned at 8.00–11.00 pm. The total number of eggs is 108.000, number of fertile eggs 60.000 pc spread in three fiber tank volume 1 m3 each fiber tank which filled with 800 L sea water. Then incubation with temperature 2830 °C. The hatching time was at 08.00–10.00 am, and then the development of morphology larvae was observed. Parameters measured were total length of larvae (TL), development of larvae and initial feeding. The study used ten individuals in every measure. Yolk sac and oil globule volume in newly hatched silver trevally larvae. The yolk sac is completely absorbed at 2-3 days, and the oil globule at 3-4 days after hatching. The initial feeding of Giant trevally commenced after the absorption process of the yolk sac was completed 2-3 days before the absorption oil globule was completed so that initial feeding or exogenous nutrition could be carried out appropriately and produce seeds to support hatchery and sustainable mariculture efforts.