Similarity of Karyotype Structure in Three Mormyrus Species (Mormyridae) from the White Nile and Omo River Tributaries (Ethiopia)

We studied the mitotic chromosome sets in three elephantfish species of the genus Mormyrus (Mormyridae, Osteoglossiformes) occurring in the White Nile and Omo-Turkana basins in south-western Ethiopia. The karyotype structure (2n = 50, FN = 84) appeared to be similar in M. caschive, M. hasselquistii and M. kannume. The Mormyrus is 14th mormyrid genera studied cytogenetically and its karyotype is unique within the family because of the least number of uni-armed chromosomes.