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Monthly Analysis of Gut Content of Near Threatened Nandus nandus (Hamilton, 1822) at Kawadighi Haor in Northern Bangladesh

This research aimed to find out the monthly variation in the gut contents of Nandus nandus. It was conducted in Kawadighi Haor of Sylhet division, Bangladesh from January to December, 2014. Four types of zooplankton belonging to crustacea (9 genera), rotifera (6 genera), fish larvae (1 genera) and several genus of insects larvae and three orders of phytoplankton viz . Bacillariophyceae (2 genera), Chlorophyceae (6 genera), and Cyanophyceae (2 genera) were recorded from the guts. Chlorophyceae (3.14±0.49×103 cells/l) was the most abundant order among phytoplankton. Crustacea (6.00±0.62×103 cells/l) was the dominant group among the zooplankton. The total amount of stomach content was higher in March (17.7×10 3 cells/l), followed by September (17.35×103 cells/l) and July (16.95×103 cells/l). The lowest food content in the guts was observed in December (11.9×103 cells/l) which was much lower than the average food content (15.64±1.60×103 cells/l). Based on the findings, it can be inferred that N. nandus preferred zooplankton the most, although feeding on both phytoplankton and zooplankton. The findings of this study are predicted to be significant in the management and conservation through domestication of near threatened N. nandus in open waters of Bangladesh paving the way for aquaculture in captivity.