Fig. 3

Pre-fertilization experiments of sea urchin P. lividus embryos to the total extract (NSHII EXT) and fractions (NSHII 2B, NSHII 2 C, NSHII 2D, NSHII 2E) from N. shiloi at the three concentrations: C1 = 0.125 mg/L; C2 = 0.250 mg/L; C3 = 0.500 mg/L.