Noise-induced masking of hearing in a labyrinth fish: effects on sound detection in croaking gouramis.

Autor(en)
Isabelle Maiditsch, Friedrich Ladich
Abstrakt

An increasing level of anthropogenic underwater noise (shipping, drilling, sonar use, etc.) impairs acoustic orientation and communication in fish by hindering signal transmission or detection. Different noise regimes can reduce the ability to detect sounds of conspecifics due to an upward shift of the hearing threshold, a phenomenon termed masking. We therefore investigated the masking effect of white noise on the auditory thresholds in female croaking gouramis (Trichopsis vittata, Osphronemidae). We hypothesized that noise would influence the detection of conspecific vocalizations and thus acoustic communication. The auditory evoked potentials (AEP) thresholds were measured at six different frequencies between 0.1 and 4 kHz using the AEP recording technique. Sound pressure level audiograms were determined under quiet laboratory conditions (no noise) and continuous white noise of 110 dB RMS. Thresholds increased in the presence of white noise at all tested frequencies by 12–18 dB, in particular at 1.5 kHz. Moreover, hearing curves were compared to spectra of conspecific sounds to assess sound detection in the presence of noise in various contexts. We showed that masking hinders the detection of conspecific sounds, which have main energies between 1.0 and 1.5 kHz. We predict that this will particularly affect hearing of female’s low-intensity purring sounds during mating. Accordingly, noise will negatively affect acoustic communication and most likely reproductive success.

Organisation(en)
Department für Verhaltens- und Kognitionsbiologie
Journal
PeerJ
Band
10
Anzahl der Seiten
18
ISSN
2167-8359
DOI
https://doi.org/10.7717/peerj.14230
Publikationsdatum
11-2022
Peer-reviewed
Ja
ÖFOS 2012
106054 Zoologie
Schlagwörter
ASJC Scopus Sachgebiete
Agricultural and Biological Sciences(all), Biochemistry, Genetics and Molecular Biology(all), Neuroscience(all)
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/noiseinduced-masking-of-hearing-in-a-labyrinth-fish-effects-on-sound-detection-in-croaking-gouramis(8b266da4-f35e-4e57-a351-2f167f2ea817).html