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♦ ¹The dietary habits of the upside-down catfish, Synodontis membranaceus (Osteichthyes: Mochokidae) in Jebba lake, Nigeria, Olufemi David Owolabi, Rev. Biol. Trop. (Int. J. Trop. Biol.) Vol. 56 (2): 931-936, June 2008
♦ ²"The food and feeding habits of Eutropius niloticus (Ruppell), family Schilbeidae (Osteichthyes: Siluriformes) in Lake Kainji, Nigeria", Akinola A. Olatunde, Hydrobiologia February 1978, Volume 57, Issue 3, pp 197-207