Species Diversity and Abundance of Fish in RoseiresReservoir, Blue Nile State of Suda
Freshwater fish diversity, abundance and the heightening effect of the Roseires reservoir, was studied from May
2010 to March 2011 in six sampling sites using experimental fishing nets. The present study has shown that Roseires
reservoir supported a total of 34 species of fishes of 13 families were recorded. Among identified fishes, fishes belonging to
family Mormyridae were dominated with (7 species) followed by Characidae with (6 species), Cyprinidae with (5 species),
Bagridaewith (4 species), Schilbeidae with (3 species) and Cichlidae with two species. According to the relative abundance
of fish species Synodontisspecies as the dominant (42.43%), followed by Latesniloticu (12.06%) and thirdly
Oreochromisniloticus (6.17%). The potential of the fisheries in the future dam- reservoir (After Heightening) will depend on
the area impounded and the dimensions. It will surely be raised at least, may be about two times to the present estimated
potential in reservoir; depending on the total surface area to be covered with water. Expected fish species composition will
not be very different from the known present status in the reservoir, as the present survey, recovered similar species
composition, since the first impoundment, with only slight changes.
Keyword - Roseires Reservoir, Biodiversity .Fish Fauna, Expansion and Heightening.