Figure 7From: Contribution to the study of acoustic communication in two Belgian river bullheads (Cottus rhenanus and C. perifretum) with further insight into the sound-producing mechanismSize to weight ratio of the two cottid species investigated. Comparison of the size to weight ratio in the recorded individuals of Cottus rhenanus (â–¡) and Cottus perifretum (â—‹).Back to article page