Fig. 3


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The trophic position of zooplankton (Daphnia ssp.), Mysids (Paramysis lacustris) and juvenile perch (Perca fluviatilis) in the lakes studied. Differences in the trophic position of perch in the presence (Invasive) and absence (Native) of P. lacustris in lakes. Significant differences between the groups (Mann–Whitney U test: P < 0.05) are indicated by lowercase letters (a, b, c).

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