ANIBEZE, C. I. P., and N. M. INYANG. “Oocyte Structure, Fecundity and Sex Ratio of <i>Heterobranchus longifilis</I> (Valenciennes 1840) in Idodo River Basin (Nigeria) With Comments on the Breeding Biology”. Journal of Aquatic Sciences, vol. 15, no. 1, Jan. 2000, pp. 59-62, doi:10.4314/jas.v15i1.19990.