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We evaluated the inclusion of peeled-mango waste meal as a source of carbohydrate in the protein:carbohydrate ratio (CP:CH) on performance and chemical composition of pacamã (Lophiosilurus alexandri) juveniles. One hundred and fifty fish (11.31±0.96g) were stocked in sixteen 500 L tanks, fed three times daily (10% of live weight), in a system with water recirculation with biofilter. The treatments consisted of four experimental diets with decreasing levels of the ratio between crude protein and carbohydrate (1.40, 0.94, 0.56 and 0.29), with four replications per treatment. At the end of 60 days, we evaluated animal performance (final average weight gain, specific growth rate, total apparent feed intake, carcass yield, survival) and physicochemical composition of the carcass. The protein:carbohydrate ratios affected all performance variables (P<0.05), except for survival (P>0.05). The carcass chemical composition variables were modified, except for mineral matter, pH and moisture. Mango meal can be used at the proportion of up to 15% in the diet for pacamã, establishing a CP:CHO ratio of 1.40 without impairing animal performance and the carcass chemical composition

The effect of mango waste meal in the protein:carbohydrate ratio on performance and body composition of pacamã fish (Lophiosilurus alexandri)