FN Archimer Export Format PT J TI Behavioural Responses of Common Dolphins Delphinus delphis to a Bio-Inspired Acoustic Device for Limiting Fishery By-Catch BT AF LEHNHOFF, Loic Glotin, Hervé Bernard, Serge Dabin, Willy LE GALL, Yves MENUT, Eric Meheust, Eleonore Peltier, Hélène Pochat, Alain Pochat, Krystel Rimaud, Thomas Sourget, Quiterie Spitz, Jérôme Van Canneyt, olivier Mérigot, Sébastien AS 1:1,2;2:2;3:3;4:4;5:5;6:5;7:4;8:4;9:6;10:6;11:7;12:8;13:4;14:4;15:1; FF 1:;2:;3:;4:;5:PDG-DFO-NSE-ASTI;6:PDG-REM-RDT-SIIM;7:;8:;9:;10:;11:;12:;13:;14:;15:; C1 UMR Marine Biodiversity, Exploitation and Conservation (MARBEC), CNRS, Université Montpellier, IFREMER, IRD, Avenue Jean Monnet, 34203 Sète, France UMR Laboratory of Computer Science and Systems (LIS), Campus de La Garde, Université Toulon, Université Aix Marseille, CNRS, DYNI, 83041 Toulon, France UMR Laboratory of Computer Science, Robotics, and Microelectronics (LIRMM), Université Montpellier, CNRS, 34095 Montpellier, France Observatoire Pelagis (UAR 3462), La Rochelle Université, CNRS, 17000 La Rochelle, France French Research Institute for Exploitation of the Sea (IFREMER), Centre Bretagne, 29280 Plouzané, France SAS Ocean technology (OCTECH), 29120 Pont l’Abbé, France Les Pêcheurs de Bretagne, 56100 Lorient, France Association du Grand Littoral Atlantique, 56100 Lorient, France C2 UNIV MONTPELLIER, FRANCE UNIV TOULON, FRANCE UNIV MONTPELLIER, FRANCE UNIV LA ROCHELLE, FRANCE IFREMER, FRANCE SAS OCEAN TECHNOLOGY (OCTECH), FRANCE PECHEURS DE BRETAGNE, FRANCE ASSOC GRAND LITTORAL ATLANTIQUE, FRANCE SI BREST SE PDG-DFO-NSE-ASTI PDG-REM-RDT-SIIM UM MARBEC IN WOS Ifremer UPR WOS Cotutelle UMR DOAJ copubli-france copubli-univ-france IF 3.9 TC 1 UR https://archimer.ifremer.fr/doc/00798/90997/96667.pdf https://archimer.ifremer.fr/doc/00798/90997/96668.zip LA English DT Article DE ;bio-acoustics;etho-acoustic;cetaceans;echolocation;clicks;whistles;buzz;burst-pulse;sound processing;Bay of Biscay AB By-catch is the most direct threat to marine mammals globally. Acoustic repellent devices (pingers) have been developed to reduce dolphin by-catch. However, mixed results regarding their efficiency have been reported. Here, we present a new bio-inspired acoustic beacon, emitting returning echoes from the echolocation clicks of a common dolphin ‘Delphinus delphis’ from a fishing net, to inform dolphins of its presence. Using surface visual observations and the automatic detection of echolocation clicks, buzzes, burst-pulses and whistles, we assessed wild dolphins’ behavioural responses during sequential experiments (i.e., before, during and after the beacon’s emission), with or without setting a net. When the device was activated, the mean number of echolocation clicks and whistling time of dolphins significantly increased by a factor of 2.46 and 3.38, respectively (p < 0.01). Visual surface observations showed attentive behaviours of dolphins, which kept a distance of several metres away from the emission source before calmly leaving. No differences were observed among sequences for buzzes/burst-pulses. Our results highlight that this prototype led common dolphins to echolocate more and communicate differently, and it would favour net detection. Complementary tests of the device during the fishing activities of professional fishermen should further contribute to assessment of its efficiency. PY 2022 PD OCT SO Sustainability SN 2071-1050 PU MDPI VL 14 IS 20 UT 000873618800001 DI 10.3390/su142013186 ID 90997 ER EF