S Paul’s research while affiliated with University of Rajshahi and other places

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Publications (1)


Seasonal analysis of food items and feeding habits of endangered riverine catfish Rita rita (Hamilton, 1822)
  • Article

June 2021

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675 Reads

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9 Citations

Brazilian Journal of Biology

M A Haque

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S Paul

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This investigation presents the food and feeding activity of and endangered riverine catfish Rita rita, during February 2017-January 2018. A total of 225 fish individuals was analyzed for stomach contents by characterizing the dominant food items and morphometric features. The results divulged ten major food items consumed, preferably fish scales and eggs, teleost fishes, copepods, cladocerans, rotifers, and mollusks. Total length and body weight of fish varied between 9-34 cm (20.53 ± 6.90 cm) and 10-400 g (9125.94 ± 102.07 g), respectively. The index of relative importance (IRI%) showed the importance of rotifers over the other food items. Morisita's index of diet overlap indicated seasonal variations in catfish diets with summer and monsoon displaying the least overlap, while maximum overlap during monsoon and winter seasons. The non-metric multidimensional scaling (nMDS) indicated the close association between the food items available during summer and winter seasons with a significant difference among the seasons (ANOSIM, R = 0.638, P = 0.013). Levin's niche breadth index arranged in the order of 0.88>0.81>0.78>0.63>0.43 for the size classes of V, IV, III, II and I, respectively. The PCA explained 95.39% of the total variance among the food items and fish size groups. Small-sized fish individuals displayed a greater correlation with food items suitable for their mouth size. In conclusion, the variety and frequency of food items recorded indicated considerable feeding plasticity and opportunistic feeding behavior with a shift from carnivorous to omnivorous feeding nature. This study could render useful information on the food and feeding habits of R. rita and provide background for preparing its diet for future aquaculture practices.

Citations (1)


... in H. fossilis are planktivorous mainly feed on crustaceans besides plant matter and worms, Noor et al. (2013) termed R. rita as carnivorous chiefly fed upon small fish, insects and crustaceans. Haque et al. (2020) reported alike food items from the analyses of gut in R. rita. Lastly, their examination verified that crustaceans (zooplankton)and insects were detected to be the important food stuffs. ...

Reference:

Investigations on the Feeding and Spawning in Bagarius bagarius from Manchar Lake District Jamshoro, Pakistan
Seasonal analysis of food items and feeding habits of endangered riverine catfish Rita rita (Hamilton, 1822)
  • Citing Article
  • June 2021

Brazilian Journal of Biology