Figure 2

Frame by frame optic flow parameters of control and treatment embryos for each of the developmental stages of Danio rerio , Xenopus laevis and Radix balthica . Red - positive angle movements, blue - negative angle movements, green - X coordinate of centre of mass, yellow - Y coordinate of centre of mass. A time period (Danio rerio - 10 min, Xenopus laevis - 10 min, Radix balthica - 5 min) of a single embryo is shown, exhibiting typical movement patterns for each treatment response per developmental stage.