Study on embryonic, incubation period and larvae development of ikan patin (Pangasius sutchi)

Abstract

This study was carried out to observe the stages of Pangasius sutchi embryo, incubation period and their larvae development. Fertilization rate for Pangasius sutchi is 87.59% and as for the hatching rate is 86.14%. The fertilized eggs are adhesive and spherical with a yellowish or greenish-brown egg capsule. The yolk sac is yellowish brown in color. The incubation period ranges from 24-35 h at a temperature 20-30 °c. The newly hatched larvae are transparent, lacking pigmentation and approximately between 3.111- 3.243 mm in length. Eye pigments and hearts started to work 12-15 hours after hatched. One day old pro-larvae, the mouth become well developed, barbules are elongated and look liked tiny thread. The yolk sac is fully absorbed during the 3 days old pro-larval stage. At the end, after two weeks the young fry is well developed, and is an adult appearance, that is measuring up to 26.765-26.910 mm in length. The survival rate for these larvae is 56% at the end of this experiment