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    gariepinus x Heterobranchus bidorsalis) larvae using twofertilization-based feeding strategies. Journal of
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2. Okonji, V.A. and Akolisa Obi. 2005 Growth performance of Oreochromis niloticus in combination with clariid
    catfishes in monoculture and polyculture. Top. Fishwater Biol. 14:61-69

3. Olele, N.F and Akolisa Obi. 2006. Food habits and condition factor of the moonfish, Citharinus ctharus, in
    Onah Lake, Delta State, Nigeria. ASSET 6(2):115-123

4. Olele, N.F and Akolisa Obi. 2006. Morphometric growth in Citharinus citharus, in Onah Lake, Asaba, Delta
    State, Nigeria. Nig. Journal of Fisheries 2/3(2):290-298

5. Oladosu, G.A., A. Obi and O.O. Oladosu. 2007. Sex determination in Heterotis niloticus (Cuvier 1829) based
    on morphometric features ASSET 6(1):22-30

6. Okonji, V.A and Akolisa Obi. 2008. Growth performance of clariid catfishes in combination with Oreochromis
    niloticus under different culture systems. Journal of Agriculture Res. and Policies 3(2):54-58

7. Olele, N.F., Obi, A. And V.A. Okonji. 2008. Composition, Abundance and Distribution of Fishes in Onah Lake,
    Asaba, Delta State, Nigeria. UNISWA (University of Waziland). Research Journal of Agriculture,
    Science and    Technology 2(1):33-43.