Figure 1.

Effect of ocean acidification on settlement-stage larval fish auditory preferences and otolith (earbone) size. (a) Mean (±s.e.) percentage of time spent by mulloway larvae (N = 64 per treatment) in the half of the choice chamber closest to the broadcasting speaker playing elevated-CO₂ or control temperate reef sounds. Stars indicate distributions significantly different (p < 0.05) from a random distribution of 50%. (b) Mean otolith surface area of mulloway (N = 22 per treatment) standardized to larval body length. Different letters indicate statistically significant (p < 0.05) differences. n.s., not significant.