Figure 2. The zebrafish visual motor response elicited with red, green or blue light is similar to the white light response.

In each panel, 96 zebrafish larvae at 5dpf were recorded swimming in the wells of a 96-well plate at 4 frames/sec using infrared macrovideography. The y-axis shows mean displacement of the 96 larvae at each frame-to-frame transition, scaled to show instantaneous mean velocity in mm/s as a measure of group motor activity. The traces show the final 20 minutes of a 40 minute acclimatization period to light (A: white; B: red; C: green; D: blue; all lights were calibrated to 450mW/cm²), followed by the first 30 minutes of the response to an abrupt light-dark transition.