Sound production, hearing and possible interception under ambient noise conditions in the topmouth minnow Pseudorasbora parva

Author(s)
Friedrich Ladich
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 œPa v. 72 dB in the presence of ambient noise). Threshold-to-noise ratios were positively correlated 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. Œ 2006 The Authors.

Organisation(s)
Journal
Journal of Fish Biology
Volume
69
Pages
892-906
No. of pages
15
ISSN
0022-1112
Publication date
2006
Peer reviewed
Yes
Austrian Fields of Science 2012
1060 Biology
Portal url
https://ucris.univie.ac.at/portal/en/publications/sound-production-hearing-and-possible-interception-under-ambient-noise-conditions-in-the-topmouth-minnow-pseudorasbora-parva(3543531d-d605-48d7-aa98-331126007dd1).html