espèce (1) fleuve (1) productivité (1) infection (1) pisciculture (1) poisson (1) barrage (1) Specimens (1) Nile tilapia (1) Specimens (1) Tilapia (1) Species (1) Performance (1) Percentage (1) Parasites (1) Infection (1) Fishes (1) Fish culture (1) Cichlids (1) Productivity (1) Parasites (1) Number (1) Performance (1)