Auditory evoked potential audiograms of the size groups investigated. Mean hearing thresholds of the size groups XXS (N = 12), XS (N = 6), S (N = 6), M (N = 5), L (N = 4) and XL (N = 6) of Synodontis schoutedeni tested. Catfish pictures show representative specimens of group XXS (left) and XL (right) drawn in proportional scale for comparative purposes.
Lechner et al. BMC Biology 2010 8:10 doi:10.1186/1741-7007-8-10