Young Allis Shad Alosa alosa (Clupeidae) Would Not Be Euryphagous: An Assessment of Juvenile Diet and Prey Selectivity under Riverine-Type Conditions

Figure 2

Numbers of consumed prey items counted in the stomachs of Alosa alosa (nonempty stomachs only) captured in the artificial river R1 in 2018 and 2019 according to their age (dark grey: one month old; light grey: two months old). The stomachs of fish from R2 were almost all empty and were thus excluded from the analysis. Corresponding numbers of fish are indicated at the top of the plot for each group. Boxplots represent median (horizontal lines), minimal, first quartile, third quartile, and maximal values; external black dots represent outliers. Significant differences between ages and years are represented at the top of the boxes (post hoc Dunn test after Kruskal–Wallis analysis of variance (: ; : ; : ).