Population status of the native Cottus gobio after removal of the alien Salmo trutta: a case-study in two Mediterranean streams (Italy) | Knowledge and Management of Aquatic Ecosystems

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Fig. 6

Comparison of the condition factor mean values for bullhead, broken down by age class before (black circles) and after (gray squares) trout removal, performed for Gorga and Cesano creeks, separately. Upper and lower bars represent the 95% confidence limits.

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