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¹ Jagannath University, Faculty of Life and Earth Sciences, Department of Zoology, Dhaka-1100, Bangladesh
² Jagannath University, Faculty of Sciences, Department of Statistics, Dhaka-1100, Bangladesh
³ Jagannath University, Faculty of Life and Earth Sciences, Department of Botany, Dhaka-1100, Bangladesh
⁴ University of Dhaka, Faculty of Biological Sciences, Department of Zoology, Dhaka-1000, Bangladesh DOI : 10.4194/2618-6381-v21_4_02 Viewed : 3969 - Downloaded : 2676 An experiment was conducted to observe some biological aspects including growth, sex ratio, gonadal maturity, artificial insemination, fecundity, fertilization, hatching and larval development of O. pabda in a private hatchery. Total weight of the sampled fish varied from 1.60±0.43 to 111.12±6.83 g and length varied from 3.57±0.65 to 21.22±1.84 cm with the SGR 2.85±0.18 and ADG 0.73±0.05. The length and weight of the fish had a strong correlation (r²=0.966). Female dominance over male has been observed in the species. The male to female ratio was 1:1.48. Females were 16.8 cm in length at first maturity, while males were 16.6 cm in length. The GSI of female were ranged from 2.93 to 4.77 with the mean of 3.77±0.60 during the study period. The fecundity of O. pabda was ranged from 5675 to 19626 with the mean of 12503±4192 for the corresponding length 21.23±1.71, body weight 111.12±7.6 and gonad weight 4.19±0.87. Fertilization rate, hatching rate and larval development observed during the experiment. Scattered diagram for length-weight, fecundity-length, fecundity-body weight and fecundity-gonad weight relationship shows a perfect correlation both arithmetically and logarithmically. Keywords : Biology, Ompok, Growth, Induced breeding, Fecundity