Some aspects of reproductive biology of gangetic ailia, \(\textit{Ailia coila}\) (Hamilton, 1822) in Bangladesh

David Rintu Das, Mahmudul Hasan Mithun, Md. Moniruzzaman, Yahia Mahmud
Author affiliations


  • David Rintu Das Bangladesh Fisheries Research Institute
  • Mahmudul Hasan Mithun Bangladesh Fisheries Research Institute
  • Md. Moniruzzaman Bangladesh Fisheries Research Institute.
  • Yahia Mahmud Bangladesh Fisheries Research Institute



Bangladesh, Breeding season, Fecundity, GSI, Gonadal histology, Length-Weight-Fecundity relationship, Ailia coila


The present study was conducted by Bangladesh Fisheries Research Institute, Floodplain Sub-station to investigate the reproductive biology of Ailia coila in the northern region of Bangladesh. A total number of 100 fish samples were collected on a monthly basis from the Atrai River and Jamuna River during the period from January 2022 to December 2022. The highest mean value of the gonado-somatic index (GSI) was recorded in July (8.78 ± 1.95%), whereas the lowest was found in December (0.15 ± 0.09%). The highest individual fecundity (2,450 ± 570) and ova diameter (0.38 ± 0.07 mm) was also observed in July. From the histological observation of the ovary, the highest percentages (75%) of mature oocytes were observed during the month of July. Based on the GSI, fecundity and gonadal histology, the breeding season of A. coila was observed from June to August with a remarkable peak in July. In the case of length weight relationship (LWR), the coefficient of determination value (r2) was found 0.96 and the slope was found b = 1.50 which indicated the pattern of negative allometric growth of this species as b < 3. In contrast, an increase was recorded in the fecundity associated with the rise of total length, body weight and gonad weight showed a significant linear relationship. This study would assist in the development of induced breeding techniques and provide valuable information for the sustainable management of this population in the inland open ecosystem.


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How to Cite

David Rintu Das, Mithun, M. H., Md. Moniruzzaman, & Yahia Mahmud. (2023). Some aspects of reproductive biology of gangetic ailia, \(\textit{Ailia coila}\) (Hamilton, 1822) in Bangladesh. Academia Journal of Biology, 45(3), 1–11.