Induced spawning and establishment of a captive population for an endangered fish, Ompok bimaculatus in India

摘要

Ompok bimaculatus is an endangered fish species of high commercial value, Over the last few decades its wild population is declining rapidly (> 50%). This fish was induced to spawn by a single intramuscular injection of ovaprim (dosage 0.5 ml/kg body weight). Spawning was observed 5-6 h after injection. An average of 4012 +/- 100 eggs were spawned by each female. Hatching occurred 24 h after spawning. Hatchlings were reared up to fingerling size after which they were released into an earthen pond and cultured for 6 months. Induced breeding of this fish enabled us for the first time to produce a captive population of 548 individuals. [References: 9]