Owing to a mistake during production, a number of corrections requested by the author were not made.
These changes include the following explanation added to the ‘Sound stimuli’ section of the Materials and Methods for the use of 1 m rather than 0.1 m as a distance for measuring boatwhistles:
We assumed a BW amplitude of 140 dB (re. 1 μPa) at 0.1 m as in Alves et al. (2016), which corresponds to a BW of a toadfish of c. 25 cm SL (Vasconcelos and Ladich, 2008). The maximum amplitude playback used in the experiments was adjusted to 130 dB (re. 1 μPa) corresponding to the estimated amplitude at 1 m from a toadfish nest (Alves et al., 2016). Note that BW amplitude changes with male size (Vasconcelos and Ladich, 2008) and attenuation is highly dependent on water level (Alves et al., 2016).
Abstract, line 15, now reads 2.0–2.5 m for the motorboat, rather than 1.7–2.5 m.
Results, second paragraph, line 5, active space for BW1 was changed to 6.4 to 2.0 m, instead of 6.4 to 1.7 m.
Results, second paragraph, line 11, significance level was changed to P=0.8, rather than P=0.9.
In Figs 2, 3, 7 and 8, BW recording distance was changed to 1.0 m, rather than 0.1 m.
In Table 1, small boat detection distance for BW1 was changed to 1.0 m (rather than 0.1 m) and mean value to 2.0±0.8 m (rather than 1.7±1.2 m).
These changes do not impact the conclusions of the paper.
All versions of the article have been updated. We apologise to the authors and readers for this error and any inconvenience it may have caused.