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New bioacoustic articles in Journal of Fish Biology

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Subject: New bioacoustic articles in Journal of Fish Biology
From: "Sonja Amoser" <>
Date: Tue, 29 Aug 2006 13:35:58 +0200
The following bioacoustic articles have recently been published in the
Journal of Fish Biology:

D. Sonny, F. R. Knudsen, P. S. Enger, T. Kvernstuen, O. Sand (2006):
Reactions of cyprinids to infrasound in a lake and at the cooling water
inlet of a nuclear power plant.
J. Fish Biol, 69(3):735-748

Abstract: Behavioural effects of infrasound on cyprinids were tested. In Lake 
Borrevann, Norway, acute avoidance responses, at a distance up to 10 m from a 
16 Hz infrasound projector were revealed by echosounding. At 10 m distance, a 
coarse estimate of the stimulus level (measured as the acceleration component 
of the particle motions) was c. 103 m s2. Habituation was not evident during 
these tests. Two synchronized infrasound units were also installed 6 m apart in 
front of a cooling water intake of a nuclear power plant on the River Meuse, 
Belgium. Echosounding was used to compare the number of fishes entering the 
intake canal during on-off infrasound sequences. Relative to off-periods, the 
reduction of the number of fishes entering during on-periods was >80% at a 
distance of 0-12 m from the units. A significant reduction of 48% was observed 
considering the whole width (54 m) that was monitored. Fish impingement on the 
mechanical screens during the study revealed that >90% o!
 f the fishes entering the intake were cyprinids.

K. Scholz, F. Ladich (2006): Sound production, hearing and possible
interception under ambient noise conditions in the topmouth minnow
Pseudorasbora parva.
J. Fish Biol., 69(3):892-906.

Abstract: Sounds were produced by the topmouth minnow Pseudorasbora parva, a 
common Eurasian cyprinid, during feeding but not during intraspecific 
interactions. Feeding sounds were short broadband pulses with main energies 
between 100 and 800 Hz. They varied in their characteristics (number of single 
sounds per feeding sequence, sound duration and period, and sound pressure 
level) depending on the food type (chironomid larvae, Tubifex worms and flake 
food). The loudest sounds were emitted when food was taken up at the water 
surface, most probably reflecting 'suctorial' feeding. Auditory sensitivities 
were determined between 100 and 4000 Hz utilizing the auditory evoked 
potentials recording technique. Under laboratory conditions and in the presence 
of natural ambient noise recorded in Lake Neusiedl in eastern Austria, best 
hearing sensitivities were between 300 and 800 Hz (57 dB re 1 μPa v. 72 dB in 
the presence of ambient noise). Threshold-to-noise ratios were positively c!
 orrelated to the sound frequency. The correlation between sound spectra and 
auditory thresholds revealed that P. parva can detect conspecific sounds up to 
40 cm distance under ambient noise conditions. Thus, feeding sounds could serve 
as an auditory cue for the presence of food during foraging.

Please contact the authors for PDF files.

Kind regards

Sonja Amoser

University of Vienna, Dept. of Neuroscience and Behavioral Biology
Sonja Amoser
PhD Student, Research Associate

Althanstrasse 14
1090 Vienna
tel: +43 (1) 4277 54467
fax: +43 (1) 4277 54506
mobile: +43 (664) 500 61 06

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