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Figure Caption
Fig. 2 Zebrafish embryo mortality percentage of the five environmental samples collected in November 2020 (Exp 1) and February 2021 (Exp 2) obtained with FET test. Black stars refer to the comparison between treated samples vs negative control (significance of Chi-squared test (χ2): *** p ≤ 0.001). Brown stars refer to the comparison between one year and another (significance of Chi-squared test (χ2): * p ≤ 0.05; significance of Chi-squared test (χ2): *** p ≤ 0.001). The horizontal line at 20% is the threshold beyond which a sample is considered toxic to zebrafish embryos
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