Fig. 2

Zinc content in muscle tissue of Nile tilapia fed on 30 or 60 mg BIO-ZnNPs/kg feed or basal diets for 8 weeks. Data are presented as Mean ± SEM. Values with a different letter are significantly different between groups (ANOVA with post hoc Tukey test). Asterisks indicate the significant level *P (<0.05), **P (<0.01). ***P (<0.001)