| Sumario: | The aim of this study is to evaluate the tilapia silage as alternative protein source in diets for Litopenaeus vannamei reared in clear-water and biofloc conditions. The experiment was performed in a “macrocosm-microcosm” device consisting of two individual systems: biofloc and clear-water. The trial used forty 40L rectangular bins in a density of 63 shrimp/m2. The juveniles were distributed in a bi-factorial completely randomized experimental design with four replicates to each treatment. The treatments were based on the percentage of silage inclusion (control, 1.5, 3.0, 4.5 and 6.0% of inclusion) in biofloc or clear-water based system, totalizing ten treatments. Survival were not affected by both system and diet and stayed above 80% in all treatments. Shrimp mean final weight and SGR was statistically influenced by system (p<0.01) but not by the diet, presenting high values in biofloc condition. Shrimp quality was not affected by diet. Replacement of fishmeal by fish silage in L. vannamei diets is a good option regarding to shrimp production and quality.
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