Skip to content

Research at St Andrews

Dynamic biosonar adjustment strategies in deep-diving Risso's dolphins driven partly by prey evasion

Research output: Contribution to journalArticlepeer-review

DOI

Open Access permissions

Open

Abstract

Toothed whales have evolved flexible biosonar systems to find, track and capture prey in diverse habitats. Delphinids, phocoenids and iniids adjust inter-click intervals and source levels gradually while approaching prey. In contrast, deep-diving beaked and sperm whales maintain relatively constant inter-click intervals and apparent output levels during the approach followed by a rapid transition into the foraging buzz, presumably to maintain a long-range acoustic scene in a multi-target environment. However, it remains unknown whether this rapid biosonar adjustment strategy is shared by delphinids foraging in deep waters. To test this, we investigated biosonar adjustments of a deep-diving delphinid, the Risso's dolphin (Grampus griseus). We analyzed inter-click interval and apparent output level adjustments recorded from sound recording tags to quantify in situ sensory adjustment during prey capture attempts. Risso's dolphins did not follow typical (20logR) biosonar adjustment patterns seen in shallow-water species, but instead maintained stable repetition rates and output levels up to the foraging buzz. Our results suggest that maintaining a long-range acoustic scene to exploit complex, multi-target prey layers is a common strategy amongst deep-diving toothed whales. Risso's dolphins transitioned rapidly into the foraging buzz just like beaked whales during most foraging attempts, but employed a more gradual biosonar adjustment in a subset (19%) of prey approaches. These were characterized by higher speeds and minimum specific acceleration, indicating higher prey capture efforts associated with evasive prey. Thus, tracking and capturing evasive prey using biosonar may require a more gradual switch between multi-target echolocation and single-target tracking.

Close

Details

Original languageEnglish
Article numberjeb216283
Number of pages9
JournalJournal of Experimental Biology
Volume223
Early online date3 Feb 2020
DOIs
Publication statusPublished - Feb 2020

    Research areas

  • Echolacation, Sensory ecology, Mesopelagic foraging, Deep-water environment, Biosonar strategies, Gain control

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Effects of 3 Tesla magnetic resonance imaging exposure on the behavior and orientation of homing pigeons Columba livia domestica

    Párraga, D. G., Tyack, P. L., Marco-Cabedo, V., Crespo-Picazo, J. L., Manteca, X. & Martí-Bonmatí, L., 18 Dec 2020, In: PLoS ONE. 15, 12, 9 p., e0241280.

    Research output: Contribution to journalArticlepeer-review

  2. On the use of the Lloyd's Mirror effect to infer the depth of vocalizing fin whales

    Pereira, A., Harris, D., Tyack, P. & Matias, L., 1 Nov 2020, In: Journal of the Acoustical Society of America. 148, 5, p. 3086-3101 16 p.

    Research output: Contribution to journalArticlepeer-review

  3. Short-term responses of sperm whales Physeter macrocephalus to the attachment of suction cup tags

    Warren, V. E., Miller, P. J. O. & Tyack, P. L., 9 Jul 2020, In: Marine Ecology Progress Series. 645, p. 219-234 16 p.

    Research output: Contribution to journalArticlepeer-review

  4. Flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey

    Goulet, P., Guinet, C., Campagna, C., Campagna, J., Tyack, P. L. & Johnson, M., 19 May 2020, In: Journal of Experimental Biology. 223, 10, 11 p., jeb.222810.

    Research output: Contribution to journalArticlepeer-review

  5. Fin whale acoustic presence and song characteristics in seas to the southwest of Portugal

    Pereira, A., Harris, D., Tyack, P. & Matias, L., Apr 2020, In: Journal of the Acoustical Society of America. 147, 4, p. 2235-2249 15 p.

    Research output: Contribution to journalArticlepeer-review

Related by journal

  1. Acceleration-triggered animal-borne videos show a dominance of fish in the diet of female northern elephant seals

    Yoshino, K., Takahashi, A., Adachi, T., Costa, D. P., Robinson, P. W., Peterson, S. H., Hückstädt, L. A., Holser, R. R. & Naito, Y., 28 Feb 2020, In: Journal of Experimental Biology. 223, 5, 9 p., jeb212936.

    Research output: Contribution to journalArticlepeer-review

  2. Diving apart together: call propagation in diving long-finned pilot whales

    Kok, A. C. M., van Kolfshoten, L., Campbell, J. A., von Benda-Beckmann, A. M., Miller, P. J. O., Slabbekoorn, H. & Visser, F., 27 May 2020, In: Journal of Experimental Biology. 223, 10, 11 p., jeb207878.

    Research output: Contribution to journalArticlepeer-review

  3. Energy compensation and received echo level dynamics in constant-frequency bats during active target approaches

    Stidsholt, L., Müller, R., Beedholm, K., Ma, H., Johnson, M. & Madsen, P. T., 28 Jan 2020, In: Journal of Experimental Biology. 223, 2, 9 p., jeb217109.

    Research output: Contribution to journalArticlepeer-review

  4. Flash and grab: deep-diving southern elephant seals trigger anti-predator flashes in bioluminescent prey

    Goulet, P., Guinet, C., Campagna, C., Campagna, J., Tyack, P. L. & Johnson, M., 19 May 2020, In: Journal of Experimental Biology. 223, 10, 11 p., jeb.222810.

    Research output: Contribution to journalArticlepeer-review

ID: 266452055

Top