Concentration factor of Se in rainbow trout fed a control diet and three diets enriched with different concentrations (0.5, 4 and 8 g Kg^-1) of Sel-Plex for ten weeks.

<p>The results represent the mean ± SEM of four independent measurements. The letters above the columns indicate values statistically significant from the controls (<i>p</i><0.05), with different letters indicating significant differences between the treatments. The tables below the graphs indicate differences in Se levels within the same diet group across the different time points.