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Relationship between ecological quality ratios evaluated by the Czech fish based index (CZ-FBI) and the common index for Central and Western Europe (CWE-FBI). Thick = mean relationship; dashed lines = 95% confidence interval; dotted line = 1:1 relationship. Regression line (mean ± SE parameter values): CZ-FBI = (−0.135 ± 0.075) + (1.027 ± 0.112) CWE-FBI, R2 = 0.85, p < 0.001.
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