Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Echolocation in the Risso's dolphin, Grampus griseus.

Jennifer D Philips1, Paul E Nachtigall, Whitlow W L Au

  • 1Marine Mammal Research Program, Hawaii Institute of Marine Biology, P.O. Box 1106, Kailua, Hawaii 96734, USA. jphilips@hawaii.edu

The Journal of the Acoustical Society of America
|February 1, 2003
PubMed
Summary

This study confirms that Risso's dolphins (Grampus griseus) echolocate using high-frequency clicks. These findings provide insights into the sonar capabilities of this unique marine mammal.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

High Frequency hearing in echolocating dolphins.

The Journal of the Acoustical Society of America·2023
Same author

Correction to: Modulation rate transfer functions from four species of stranded odontocete (Stenella longirostris, Feresa attenuata, Globicephala melas, and Mesoplodon densirostris).

Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology·2021
Same author

Possible limitations of dolphin echolocation: a simulation study based on a cross-modal matching experiment.

Scientific reports·2021
Same author

Variations in received levels on a sound and movement tag on a singing humpback whale: Implications for caller identification.

The Journal of the Acoustical Society of America·2020
Same author

Modeling of the near to far acoustic fields of an echolocating bottlenose dolphin and harbor porpoise.

The Journal of the Acoustical Society of America·2020
Same author

The startle reflex in echolocating odontocetes: basic physiology and practical implications.

The Journal of experimental biology·2020

Area of Science:

  • Marine Biology
  • Bioacoustics
  • Cetacean Research

Background:

  • Risso's dolphins (Grampus griseus) are delphinids known for their unique forehead morphology.
  • Their feeding habits are exclusively cephalopod-based, suggesting potential reliance on sophisticated sensory mechanisms.

Purpose of the Study:

  • To investigate the echolocation capabilities of Risso's dolphins.
  • To characterize the acoustic properties of their emitted clicks.

Main Methods:

  • A female Risso's dolphin was trained to perform auditory discrimination tasks in an open-water pen.
  • The dolphin wore eyecups to simulate visual impairment during the experiments.
  • Acoustic recordings of emitted clicks were captured and analyzed for amplitude, frequency, and duration.

Related Experiment Videos

Main Results:

  • The dolphin successfully completed the discrimination tasks, indicating functional sensory perception.
  • Echolocation clicks were recorded with high source levels (up to 216 dB re 1 microPa-1 m) and high peak frequencies (up to 104.7 kHz).
  • The acoustic parameters of the clicks were comparable to those of other echolocating odontocetes.

Conclusions:

  • The study provides definitive evidence that Risso's dolphins echolocate.
  • The acoustic characteristics of their clicks are consistent with those of other toothed whales.
  • Further research is needed to understand the beam characteristics of their sonar transmission.