Brood Rearing and Dose Optimisation for Induced Breeding of Raikor, Cirrhinus reba (Hamilton, 1822)

Authors : David Rintu DAS, Shamım RAYHAN, Rezoanul HAQUE, Nasima BEGUM, Mohammad HOSSAİN, Debasısh PANDIT
Pages : 151-159
Doi:10.26650/ASE20231262381
View : 141 | Download : 76
Publication Date : 2023-07-24
Article Type : Research Paper
Abstract :An experiment on brood rearing and induced breeding of the near threatened fish species Raikor, Cirrhinus reba using the pituitary gland insert ignore into journalissuearticles values(PG);, was conducted from March to August 2020 at the Floodplain Sub-station of Bangladesh Fisheries Research Institute, Santahar, Bogura. Broods were collected and reared in the ponds of the hatchery complex. The total length insert ignore into journalissuearticles values(cm);, body weight insert ignore into journalissuearticles values(g);, gonad weight insert ignore into journalissuearticles values(g);, and gonado-somatic index insert ignore into journalissuearticles values(%); of this species were measured during the rearing period. To standardize the breeding technique, a total of 90 brood fish of C. reba were treated with different doses of PG, specifically, 2.0, 4.0, 6.0 mg/kg body weight for females and 1.0, 2.0, 3.0 mg/ kg body weight for males in different treatments, namely T1, T2, and T3 respectively. A significant difference insert ignore into journalissuearticles values(p<0.05); was observed in fecundity, ovulation insert ignore into journalissuearticles values(%);, and the fertilization rate insert ignore into journalissuearticles values(%); among the treatments. Based on the results, T2 insert ignore into journalissuearticles values(4.0 mg/kg body weight for females, 2.0 mg/kg body weight for males); produced the most favorable results. The current observations could be applied to C. reba stimulated breeding for the advancement of hatchery formation. More research on the nursing, nurturing, and culture of the near- threatened C. reba at varied densities and feedings is necessary for their conservation and restoration.
Keywords : duced breeding, embryology, gonado somatic index, C reba

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