Fig. 1

Decision between Approach versus Avoidance Is Modulated by Feeding State

(A) Scheme of the behavioral setup.

(B and C) Examples of starved (B) and fed (C) 7 dpf zebrafish larvae demonstrating easy identification of individuals with food in their digestive tract (red arrows).

(D and E) Graphs depicting average valence (D) and activity (E) indeces of starved and fed 7 dpf larvae for various stimulus sizes (plotted on logarithmic scale). The valence index measures the tendency of animals to either pursue (positive valence) or avoid (negative valence) visual stimuli, without considering pursuit and avoidance efficiency. When the visual index is 0, larvae pursue or avoid circles with a 50% probability. The fish-visual stimulus interaction efficiency is measured with the activity index. *p < 0.05; t test with Benjamini-Hochberg correction. Data are presented as mean ± SEM.

See also Movies S1 and S2.