Range-dependent flexibility in the acoustic field of view of echolocating porpoises (Phocoena phocoena)

ELife
Danuta WisniewskaP T Madsen

Abstract

Toothed whales use sonar to detect, locate, and track prey. They adjust emitted sound intensity, auditory sensitivity and click rate to target range, and terminate prey pursuits with high-repetition-rate, low-intensity buzzes. However, their narrow acoustic field of view (FOV) is considered stable throughout target approach, which could facilitate prey escape at close-range. Here, we show that, like some bats, harbour porpoises can broaden their biosonar beam during the terminal phase of attack but, unlike bats, maintain the ability to change beamwidth within this phase. Based on video, MRI, and acoustic-tag recordings, we propose this flexibility is modulated by the melon and implemented to accommodate dynamic spatial relationships with prey and acoustic complexity of surroundings. Despite independent evolution and different means of sound generation and transmission, whales and bats adaptively change their FOV, suggesting that beamwidth flexibility has been an important driver in the evolution of echolocation for prey tracking.

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Citations

Jun 17, 2015·Proceedings of the National Academy of Sciences of the United States of America·Lasse JakobsenAnnemarie Surlykke
Jun 22, 2015·The Journal of the Acoustical Society of America·Mafalda de FreitasPeter T Madsen
Apr 30, 2015·ELife·Peter Tyack
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Jul 8, 2016·Scientific Reports·Meike Linnenschmidt, Lutz Wiegrebe
May 21, 2017·The Journal of Experimental Biology·Michael LadegaardPeter Teglberg Madsen
Jun 28, 2018·Scientific Reports·P M SørensenP T Madsen
Jul 28, 2019·The Journal of Experimental Biology·Michael Ladegaard, Peter Teglberg Madsen
Jul 1, 2019·The Journal of the Acoustical Society of America·Adam B SmithLeo J A Suarez
Mar 4, 2017·The Journal of the Acoustical Society of America·Jamie MacaulaySimon Northridge
Dec 10, 2017·The Journal of Experimental Biology·Lasse JakobsenAnders Hedenström
May 3, 2019·The Journal of the Acoustical Society of America·Josefin StarkhammarMaria Sandsten
Jul 28, 2018·Proceedings. Biological Sciences·Morgan J MartinFrants H Jensen
Aug 5, 2018·The Journal of the Acoustical Society of America·Anne BøttcherPeter T Madsen
Feb 8, 2019·The Journal of Experimental Biology·Stefan Greif, Yossi Yovel
Jun 4, 2020·The Journal of the Acoustical Society of America·Emily T GriffithsJeffrey E Moore
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Jan 31, 2021·The Journal of the Acoustical Society of America·Kristian BeedholmPeter Teglberg Madsen
Mar 27, 2021·The Journal of the Acoustical Society of America·M B PedersenP T Madsen
Mar 28, 2021·The Journal of Experimental Biology·Chloe E MalinkaPeter Teglberg Madsen
Oct 9, 2015·The Journal of Experimental Biology·Michael LadegaardPeter Teglberg Madsen
May 5, 2021·The Journal of the Acoustical Society of America·A M von Benda-BeckmannP J O Miller

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