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Portable Fiberglass Reinforced Plastic (FRP) pabda hatchery consisting of three incubation pools and three rearing tanks having capacity to accommodate about 45,000 50,000 nos. fertilized eggs and to produce about 10,000 – 15,000 nos. of early fry of Ompok bimaculatus (pabda) in a single cycle was developed, established and operated at Kalyani Field Station of RRC-Rahara of ICAR-CIFA. Four different induced breeding experiments were conducted using 14 pairs of pabda brooders (female: 120.75 ± 39.25 g and male: 68.89 ± 15.92 g) in the established hatchery between August and October, 2019 using synthetic hormone Ovatide. Brooders were injected within 8-12 hrs of harvest to ensure proper acclimatization and also to avoid stress due to long time confinement. Females and males were injected with hormone @ 1.5 ml and 0.75 ml per kg body weight, respectively. Latency period was 8.5-10 hrs and relative fecundity ranged from 131-186 eggs/g body weight of female. Rate of fertilization achieved was 72.57 ± 6.62% at water temperature range of 25-27°C. Fertilized eggs were distributed in the FRP incubation pools and maintained for hatching in two different flow-through systems (feeble water circulation + aeration, and feeble water shower + aeration). Eggs hatched out between 22–27 hrspost fertilization (hpf) at water temperature of 26.67 ± 1.58°C, with no clear difference between the two systems. Though not statistically significant, average rate of hatching were observed little higher in system with feeble water shower and aeration (65.25 ± 7.71%) than feeble water circulation and aeration (64.20 ± 9.47%). Yolk-sac of newly hatched larvae (measured 3.8 – 4.5 mm in length) got absorbed within 60 hpf. A total of approximately 43,000 nos. seeds after 7 days of hatching with hatchlings survival rate of 43.8 to 58.5% were achieved. K e y w o r d s

Induced Breeding of Butter Catfish Ompokbima culatus Using Developed Portable FRP Pabda Hatchery for Seed Production