Uka A.Oladosu G. A.Ayinla O. A.2026-05-221996978-2345-108ui_art_uka_size_1996NIOMR Technical Paper No. 102https://repository.ui.edu.ng/handle/123456789/14073Reciprocal hybrids of Clarias gariepinus and Heterobranchus bidorsalis were compared for size variation, growth and body conformation. Growth was observed to be significantly faster (P<0.05), and size variation less pronounced (CV = 26%) for C. gariepinus (female) and H. bidorsalis (male) hybrid, than the reciprocal (CV=38%) No difference was observed in the body conformation between the reciprocal hybrids. However, the percent head length of the standard length was significantly smaller (P<0.05) in the reciprocal hybrids than that observed for the parent species.enClarias gariepinusHeterobranchus bidorsalisTechnical Report