Open Access Research Paper Views (355) Download (17) Ratio « number of males on number of females » for the mass production of Sarotherodon melanotheron’s fry in concrete tanks Chikou Antoine J. Bio. Env. Sci.14( 1), 72-81, January 2019. Key: NurseryRatio Mâle/FemaleReproductionSarotherodon melanotheron Details