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. 2017 Jan 12;7:40385. doi: 10.1038/srep40385

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Copyright © 2017, The Author(s)

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Density (A,B; means ± s.d., n = 5) of Chlorella pyrenoidosa in the absence of grazers and feeding rates (C,D; means ± s.d., n = 5) of Daphnia magna on C. pyrenoidosa after 4 (A,C) and 12 h (B,D) of exposure to four norfloxacin concentrations (0, 25, 50 and 100 mg L⁻¹). Differences between algal density of C. pyrenoidosa rates at the 4^th and 12^th h of the experiment were assessed by one-way analysis of variance (ANOVA), followed by Tukey’s post hoc tests. Differences between mean feeding rates of D. magna at the 4^th and 12^th h of the experiment were measured by one-way ANOVA and one-way analysis of covariance (ANCOVA), respectively, followed by Tukey’s post hoc test. Figure 5 was produced in Microsoft Excel 2016.