Fig. 2


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Variation in (a) population diet breadth (Shannon-Wiener H’ index) and (b) individual diet specialization (IS index) for small (open symbols) and large (black symbols) pumpkinseed Lepomis gibbosus during the establishment (1985) and integration stages (2003 and 2013) of the invasion in the mainstem of the Guadiana river (Portugal). Error bars represent boot-strapped 95% confidence intervals for each index.

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