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SOME ASPECTS OF REPRODUCTIVE BIOLOGY OF GANGETIC AILIA, Ailia coila (HAMILTON, 1822) IN BANGLADESH.
- Source :
-
Journal of Biology / TẠp chí Sinh HỌc . Sep2023, Vol. 45 Issue 3, p1-11. 11p. - Publication Year :
- 2023
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Abstract
- The present study was conducted by Bangladesh Fisheries Research Institute, Floodplain Substation 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08667160
- Volume :
- 45
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Biology / TẠp chí Sinh HỌc
- Publication Type :
- Academic Journal
- Accession number :
- 172798717
- Full Text :
- https://doi.org/10.15625/2615-9023/18360