Mazumder, Sabuj Kanti and Kunda, Mrityunjoy and Iqbal, Mohammed Mahbub and Basak, Lipi Rani and Simon Kumar Das, (2021) Seasonal dynamics of stomach contents, trophic level, length-weight relationship and condition factor of Mystus bleekeri (Day, 1877). Sains Malaysiana, 50 (4). pp. 907-918. ISSN 0126-6039
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Abstract
The Asian catfish Mystus bleekeri is a popular food fish along with favored as an ornamental fish in Bangladesh. Till now detailed report on stomach contents, trophic level, length-weight relationship and condition factor of this fish species in the agro-climatic context of Bangladesh is lacking. Hence, the aims of this study were to describe the stomach content, trophic level, length-weight relationship (LWR) and condition factors of Mystus bleekeri collected from Dekhar Haor, Sylhet, Bangladesh from July 2017 to June 2018. A total of 600 specimens ranging from 6.9-24.6 cm total length (TL) and 5.7-72.4 g body weight (BW) was analyzed in this study. Stomach content analysis showed that the fish fed mostly on Mollusca with a frequency of occurrence (fo : 25.36%) and worms (fo : 21.68%), followed by plant matters (fo : 3.32%), Cladocerana (fo : 1.18%), Copepoda (fo : 0.95%), and Teleostei (fo : 0.36%). The estimated mean trophic level (TROPH) ranged from 2.35±0.13 in December to 3.02±0.23 in August, indicating that they are opportunistic feeder. The LWR analysis showed negative allometric growth (b<3) throughout the year. The values of the exponent b in the LWR (W=aLb ) vary between 1.474 and 2.490. The mean K value was significantly higher in October indicating the heavier weight and better condition of the fish (P<0.05). The data obtained from this study would be useful to introduce sustainable management of Mystus bleekeri not only in Dekhar Haor but also in other inland waters of Bangladesh.
Item Type: | Article |
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Keywords: | Condition factor; Length-weight relationship; Mystus bleekeri; Stomach content; Trophic level |
Journal: | Sains Malaysiana |
ID Code: | 17165 |
Deposited By: | ms aida - |
Deposited On: | 22 Jul 2021 01:08 |
Last Modified: | 26 Jul 2021 02:31 |
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