While the reintroduction of wild stocks may be not be cost-effective for a species of low economic value like C. gariepinus, Goyard et al. (2008) recommended, based on empirical data for the Pacific blue shrimp (Penaeus stylirostris), that simple crossing between genetically differentiated introduced captive stocks, which suffer from inbreeding, results in performance improvement by heterotic effect or by recovery of the F1 from inbreeding.