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

Wisniewska, Danuta M.; Ratcliffe, John M.; Beedholm, Kristian; Christensen, Christian B.; Johnson, Mark; Koblitz, Jens C.; Wahlberg, Magnus; Madsen, Peter T.

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

Files

Wisniewska_2-6d1upndoh3ux2.pdf(3.08 MB)

Date

2015

Authors

Wisniewska, Danuta M.

Ratcliffe, John M.

Beedholm, Kristian

Christensen, Christian B.

Johnson, Mark

Koblitz, Jens C.

Wahlberg, Magnus

Madsen, Peter T.

Publication type

Journal article

Publication status

Published

Published in

eLife ; 4 (2015). - e05651. - eLife Sciences Publications. - eISSN 2050-084X

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.

Subject (DDC)

570 Biosciences, Biology

Cite This

ISO 690

WISNIEWSKA, Danuta M., John M. RATCLIFFE, Kristian BEEDHOLM, Christian B. CHRISTENSEN, Mark JOHNSON, Jens C. KOBLITZ, Magnus WAHLBERG, Peter T. MADSEN, 2015. Range-dependent flexibility in the acoustic field of view of echolocating porpoises (Phocoena phocoena). In: eLife. eLife Sciences Publications. 4, e05651. eISSN 2050-084X. Available under: doi: 10.7554/eLife.05651.001

BibTex

@article{Wisniewska2015Range-50989,
  year={2015},
  doi={10.7554/eLife.05651.001},
  title={Range-dependent flexibility in the acoustic field of view of echolocating porpoises (Phocoena phocoena)},
  volume={4},
  journal={eLife},
  author={Wisniewska, Danuta M. and Ratcliffe, John M. and Beedholm, Kristian and Christensen, Christian B. and Johnson, Mark and Koblitz, Jens C. and Wahlberg, Magnus and Madsen, Peter T.},
  note={Article Number: e05651}
}

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Refereed

Yes