Fig. 7.

Behavioral audiogram of the acoustic startle response of 5–6 d.p.f. zebrafish (N=10 plates of 24 fish) to particle motion stimuli (open circles) and audiogram of hearing sensitivity using the PPI assay (N=10 plates, filled circles) to sub-threshold particle motion stimuli. Thresholds were defined as a 5% probability of startle for the startle response assay or a 5% inhibition of startle from the paired catch trials in the PPI assay. Data are presented as median ± 1 quartile. Lower numbers indicate higher sensitivities. Note that all prepulse thresholds are significantly lower than startle response thresholds.