Figures:
Figure 1: Δ13C and
Δ15N of muscle and liver tissue of different weight
classes in perch. Weight classes with the same letter are not
significantly different (Bonferroni pairwise comparisons of ANCOVA with
final weight as a covariate). Boxplots depict median, 25th and 75th
percentile, and whiskers extend to maximum and minimum values, except
for outliers (>1.5 times box height, represented by dots).