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Figure 3 | Frontiers in Zoology

Figure 3

From: Contribution to the study of acoustic communication in two Belgian river bullheads (Cottus rhenanus and C. perifretum) with further insight into the sound-producing mechanism

Figure 3

Hearing thresholds of the two cottid species investigated. (A) Sound pressure level (SPL) and (B) Particle acceleration level (PAL) audiograms showing auditory capacities measured in Cottus rhenanus (n = 11, blue line) and C. perifretum (n = 10, red line). Results are expressed as mean ± S.D. values. Grey lines represent hearing thresholds for the goldfish Carassius auratus[23]. Note that PALs are expressed in dB re 1 m s-2 to be compared to data from Radford et al. [23].

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Frontiers in Zoology

ISSN: 1742-9994