Although several bioacoustics investigations have shed light on the acoustic communication of Mediterranean fish species, the occurrence of fish sounds has never been reported below −40 m depth. This study assessed the occurrence of fish sounds at greater depths by monitoring the soundscape of a Mediterranean submarine canyon (Calvi, France) thanks to a combination of Static Acoustic Monitoring (three stations, from −125 to −150 m depth, 3 km from coastline) and of hydrophone-integrated gliders (Mobile Acoustic Monitoring; from −60 to −900 m depth, 3–6 km from coastline). Biological sounds were detected in 38% of the audio files; ten sound types (for a total of more than 9.000 sounds) with characteristics corresponding to those emitted by vocal species, or known as produced by fish activities, were found. For one of these sound types, emitter identity was inferred at the genus level (Ophidion sp.). An increase of from 10 to 15 dB re 1 μPa in sea ambient noise was observed during daytime hours due to boat traffic, potentially implying an important daytime masking effect. This study shows that monitoring the underwater soundscape of Mediterranean submarine canyons can provide holistic information needed to better understand the state and the dynamics of these heterogeneous, highly diverse environments.
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April 2020
April 22 2020
Fish biophony in a Mediterranean submarine canyona)
Special Collection:
The Effects of Noise on Aquatic Life
Marta Bolgan;
Marta Bolgan
b)
1
Laboratory of Functional and Evolutionary Morphology (Freshwater and Oceanic Sciences Unit of Research), Institut de Chimie
, B6c, University of Liège, 4000 Liège, Belgium
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Cedric Gervaise;
Cedric Gervaise
2
CHORUS Institute
, INP Phelma Minatec, 3 Parvis Louis Néel, 38016 Grenoble, France
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Lucia Di Iorio;
Lucia Di Iorio
2
CHORUS Institute
, INP Phelma Minatec, 3 Parvis Louis Néel, 38016 Grenoble, France
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Julie Lossent;
Julie Lossent
2
CHORUS Institute
, INP Phelma Minatec, 3 Parvis Louis Néel, 38016 Grenoble, France
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Pierre Lejeune;
Pierre Lejeune
3
Station de Recherches Sousmarines et Océanographiques
, Pointe Revellata BP33, 20260 Calvi, France
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Xavier Raick;
Xavier Raick
1
Laboratory of Functional and Evolutionary Morphology (Freshwater and Oceanic Sciences Unit of Research), Institut de Chimie
, B6c, University of Liège, 4000 Liège, Belgium
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Eric Parmentier
Eric Parmentier
1
Laboratory of Functional and Evolutionary Morphology (Freshwater and Oceanic Sciences Unit of Research), Institut de Chimie
, B6c, University of Liège, 4000 Liège, Belgium
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b)
Electronic mail: marta.bolgan@gmail.com
a)
This paper is part of a Special Issue on The Effects of Noise on Aquatic Life.
J. Acoust. Soc. Am. 147, 2466–2477 (2020)
Article history
Received:
December 24 2019
Accepted:
March 28 2020
Citation
Marta Bolgan, Cedric Gervaise, Lucia Di Iorio, Julie Lossent, Pierre Lejeune, Xavier Raick, Eric Parmentier; Fish biophony in a Mediterranean submarine canyon. J. Acoust. Soc. Am. 1 April 2020; 147 (4): 2466–2477. https://doi.org/10.1121/10.0001101
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