Fig. 6: Pressure power spectral density level (L_p,f (re 1 µPa² Hz⁻¹)) and particle acceleration power spectral density level (L_a,f (re 1 (µm s⁻²)² Hz⁻¹)) plots showing the mean (solid line) with 5% and 95% exceedance levels (coloured band around solid line) for busy-boating and limited-boating or no-boating treatments.

A L_p,f in the wild study (average from three nests per site, ‘busy boating’ includes three passes of a motorboat at 10–250 m per recording location, recordings of limited boating were three minutes in duration per nest). B L_a,f in the wild study (same recording design as for pressure). C L_p,f in the parental tanks in the captive study (27 locations in a 3 × 3 × 3 grid within the tank, 1-min sample of motorboat playback and ambient reef sound playback for each case). D L_a,f in the parental tanks in the captive study (same recording design as for pressure), E L_p,f in the juvenile tanks in the captive study from the centre of the rearing tank (these tanks were too small to accommodate the particle motion sensor).