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Population growth and reproductive potential of five important fishes from the freshwater bodies of Bangladesh | ||
| Iranian Journal of Fisheries Sciences | ||
| مقاله 25، دوره 17، شماره 4، زمستان 2018، صفحه 657-674 اصل مقاله (514 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22092/ijfs.2018.116824 | ||
| نویسندگان | ||
| M.T Alam1؛ M.A Hussain2؛ S Sultana3؛ M.T Hasan1؛ A.G Mazlan4؛ K.D Simon* 5؛ Sabuj Kanti Mazumder Mazumder6 | ||
| 1Department of Aquaculture, Sylhet Agricultural University, Sylhet, Bangladesh. | ||
| 2Departemt of Fisheries, Rajshahi University, Bangladesh. | ||
| 3Department of Zoology, Rajshahi University, Bangladesh. | ||
| 4Institute of Tropical Aquaculture, University of Malaysia Terengganu, 21030, Kuala Terengganu, Malaysia. | ||
| 5School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, University Kebangsaan Malaysia, 43600, UKM, Bangi, Selangor, D. E., Malaysia. | ||
| 6Assistant Professor | ||
| چکیده | ||
| Population growth (length-weight relationship), and reproductive potential (e.g. fecundity, and sex-ratio) of five important fish species (‘mola’: Amblypharyngodon mola, ‘puti’: Puntius sophore, ‘tengra’: Mystus vittatus, ‘shing’: Heteropneustes fossilis and ‘taki’: Channa punctatus) collected from two important fresh waters bodies (namely Hilna beel and Beel Kumari beel) Rajshahi, Bangladesh, were studied. Population growth pattern by length-weight relationship (W=aLb) for the species differed, and exhibited positive allometric growth (P. sophore in Hilna beel), isometric growth (A. mola and C. punctatus in Hilna beel) and negative allometric growth (M. vittatus & H. fossilis in Hilna beel and A. mola, P. sophore, M. vittatus, C. punctatus & H. fossilis in Beel Kumari beel). The results denoted that the fecundity of mature females followed non-linear relationship (F=aLb) with total length and exhibited positive allometric growth (b>3) with some exception (A. mola in Hilna beel and M. vittatus in Beel Kumari beel). The fecundity of mature females also increased with total body weight and ovary weight following the linear relationship (F=a+bW). Differences in values of sex-ratios with seasons for all species in this study may have resulted from different environmental factors as well as breeding seasons. The findings of this study would be useful in imposing adequate regulations for the conservation of these fascinating fishes in the fresh water bodies of Bangladesh. | ||
| کلیدواژه ها | ||
| Beel؛ Fecundity؛ sex-ratio؛ length-weight relationship؛ small indigenous fish | ||
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