INDUCTION OF SPAWNING AND NURSING PANGAS, PANGASIANODON HYPOPHTHALMUS (SAUVAGE, 1878) UNDER HATCHERY SYSTEM

Abstract

Induced breeding of pangas, Pangasianodon hypophthalmus was carried out from May to August, 2020. The experiment was carried out in the month of May, June, July and August 2020 with PG and LHRH-A. Two hormonal sources were tested to evaluate their efficacy on ovulation, fertility and hatching rate of pangas under controlled condition. Double doses of PG (an initial dose of 2.0 mg/kg body weight and final dose of 8.0-10.0 mg/kg body weight) and single dose of Ovuline® (LHRH-A) (0.50 -0.60 ml/kg body weight) showed better results in case of female. In the month of June, PG and LHRH-A showed better results in ovulation, fertility and hatching rate. Males were administered with a single dose of LHRH-A (0.15 ml/kg body weight) and PG (2 mg/kg body weight) showed better results in spermiation. The hatchery operators may use both PG and LHRH-A for induction of spawning better performance of P. hypophthalmus breeding.