Fig. 2.

Teratogenicity of chemical fractions from C. raciborskii containing a mixture 1-4, in the zebrafish embryo model. Shown, as representatives of development dysfunction, are observed effects in embryos exposed to 50 μg mL⁻¹ of the 100% ethyl acetate fraction including severely bent body axis and edema (A), and delayed hatching (B), at 6dpf. In addition, embryos exposed to a lower concentration, i.e. 20 μg mL⁻¹, of the fraction, likewise, showed less pronounced effects including bent body axis (D) and similarly delayed hatching (E) at 6 dpf. For comparison, 6 dpf control (untreated) embryos are shown (F).