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Observations on the parasites of Tilapia nilotica and Clarias mossambicus Lake Awassa, Ethiopia.  [1979]

Shibru Tedla and Taddese G.Egziabher(Associate Professor and Assistant professor, respectively) Ethiopian Journal of Agricultural Sciences [Corporate Author]

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A preliminary survey of crustactean parasites of Tilapia nilotica (Cavier) 1844 and Clarias mossambicus Peters 1852 from Lake Awassa, Ethiopia, was made, Some helminth parasites of T. nilotica were also studied. The distribution of tfhe copepod parasite Lernaea lophiara Harding on the body of T. nilotica and that of the branchiuran parasites Dolops ranarum (stuhlmann) and Argulus africanus Thiele on the body of C. mossambicus could not be explained by chance alone. So far only the monogenean parasite Mocrogyrodactylus clarii (7) and the nematode parasite Apalectama chamaeleonis Baylis (3) have been reported as parasites on freshwater fishers of Ethiopia. The present study consists of a preliminary survey of crustacean parasites of Tilapia nilotica (Cavier) 1844 and Clarias mossambicus Peters 1852 from Lake Awassa. It also includes some internal and external helminth parasites of T. nilotica form the same lake. Lake Awassa is situated in the southern part of Ethiopia at 7o o3'N, 38o 24'E and at an altitude of 1,825m. It has a surface area of 130 sq. k., a maximum depth of 23m and a mean depth of 11.5m. This Rift Valley Lake is categorized as an oligomictic lake (1).

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Ethiopian Journal of Agricultural Sciences