International Journal of Fisheries and Aquatic Studies 2016; 4(5): 109-113 Induced spawning and larval rearing of endangered species Nandus nandus (Hamilton) in cemented cistern using pituitary hormone injection

Md Sarwer, David Das, Mahmudur Rahman, Jilani Ak, Chowdhury, Md Sarwer, Mst Sharmin, Golam Sarwer, David Das, Mahmudur Rahman, Ak Chowdhury
unpublished
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
more » ... ht 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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