Author(s): Saman Nadeem, Kashifa Naghma Waheed, Muhammad Zafarullah, Muhammad Ashraf, Shahid Sherzada and Hira Nadeem

Abstract: The objectives behind the study was to understand the food preferences of the selected adult fish and the young ones, thereby providing information for culturing the preferred feeds under laboratory conditions for future studies and requirements. The various fish species samples were dissected and analyzed for collection of microorganisms. The quality as well as quantity of microorganism species were analyzed with the help of Sedgwick-Rafter counting Chamber. It was observed that the microorganisms were lower in number in the gut contents of fish samples collected from River Ravi due to higher levels of contamination of water at the particular site. It was reasoned on the basis of all analytical results that Cirrhinus mrigala was found herbivorous while Channa punctatus was mainly found carnivorous; however, Oreochromis niloticus and Labeo boga both were found to be omnivorous. The present study revealed that the water quality of River Ravi possesses pollutants to varying extents which poses a dangerous threat to both human and aquatic lives.

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