Figure 1. Experimental timeline showing the different feeding regimes during rearing and the recording of spontaneous and evoked hunt behavior.

Embryos are separated in three dishes, with differential feeding initiated at 4.5 dpf. Each group receives a feed once per day (see Materials and methods). Behavioral recording is performed at 7 dpf. Spontaneous eye-vergence events are measured by recording individual larvae for 10 min in the absence of prey. Live prey (≈30 Rotifers) are then added. Acclimatization in prey conditions for a period of ≈1–2 hr is followed by recording of larvae in the presence of live prey. Live prey is topped up to initial level prior to recording.