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Table 2 Mean (± S.D.) hearing thresholds of the two cottid species investigated

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

 

Cottus rhenanus(n = 11)

Cottus perifretum(n = 10)

Frequency

SPL threshold

PAL threshold

SPL threshold

PAL threshold

p-value

(Hz)

(dB re 1 μPa)

(dB re 1 μm/s2)

(dB re 1 μmPa)

(dB re 1 μm/s2)

 

50

131 ± 2.8

52.0 ± 0.11

132 ± 2.9

51.9 ± 0.12

>0.05

150

126 ± 4.1

50.6 ± 0.18

126 ± 3.2

50.7 ± 0.16

>0.05

300

128 ± 3.8

52.1 ± 0.19

129 ± 2.9

52.0 ± 0.10

>0.05

600

145 ± 5.0

53.9 ± 0.10

147 ± 4.5

53.9 ± 0.07

>0.05

900

160 ± 5.2

54.1 ± 0.08

159 ± 4.2

54.0 ± 0.09

>0.05

1200

nr

nr

nr

nr

nr

  1. n, number of specimens analyzed; nr, no response.
  2. p-values refer to the results of the non-parametric Mann–Whitney U test.
  3. PAL thresholds are determined from the z-axis component as the two horizontal axes (x- and y-axes) yielded much smaller particles accelerations (see Table 3).
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Frontiers in Zoology

ISSN: 1742-9994