Author(s): Mst S Sharmin, Md Golam Sarwer, David Rintu Das, Md Mahmudur Rahman and AK Jilani Chowdhury

Abstract: The present study deals with brood development at different stocking densities, Standardization of induced breeding technique and larval rearing of Nandus nandus. To develop N. nandus broods, average body weight (Male 20.50 ± 3.7cm, Female 14.50 ± 4.0 cm) were reared 3 months at different densities (T₁= 40/deci T₂= 60/deci T₃= 80/deci). Feeding with fry, dead small fises and artificial feed contain 30% rice bran, 30% wheat bran, 20% fish meal, 15% MOC, 5% molasses two times daily@ 5-3% body weight was done. Brood was highest wt. (Male 34 ± 4.20gm Female 62 ± 5.10 gm) in case of density T₁= 40/deci. For standardization of breeding technique of N. nandus three different doses of PG were tested viz 4, 6, 8 mg/kg BW for female and 1.5, 2, 2.5 mg/kg BW for male. Sex ratio male: female =1:1 was maintained. PG treatment with 1.5mg/kg for male and 4 mg/kg for female revealed best fertilization (95 ± 5) % and hatching (88 ± 2) %. After 72 hours hatchlings were transferred to pond for larval rearing for 20 days. Average Length attained from (4.01 ± 0.05) to (23.02 ± 0.245) mm and weight (0.90 ± 0.003) to (370.00 ± 0.025) mg for 20 days rearing.

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