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Related Experiment Video

Updated: May 10, 2026

Handling and Tagging Techniques for Implanting Juvenile American Shad with a New Acoustic Microtransmitter
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Handling and Tagging Techniques for Implanting Juvenile American Shad with a New Acoustic Microtransmitter

Published on: June 14, 2024

Tracking dolphin whistles using an autonomous acoustic recorder array.

Sean M Wiggins1, Kaitlin E Frasier, E Elizabeth Henderson

  • 1Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, California 92093-0205, USA. swiggins@ucsd.edu

The Journal of the Acoustical Society of America
|June 8, 2013
PubMed
Summary
This summary is machine-generated.

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Dolphin whistles were tracked using acoustic arrays, revealing distinct daytime and nighttime vocalizations and movements. This research offers insights into dolphin behavior and ecology through long-term acoustic monitoring.

Area of Science:

  • Marine Biology
  • Bioacoustics
  • Animal Behavior

Background:

  • Dolphins produce omnidirectional whistles detectable over kilometers.
  • Acoustic arrays enable the localization and tracking of marine mammal vocalizations.

Purpose of the Study:

  • To investigate dolphin acoustic activity and movement patterns using a km-scale acoustic array.
  • To correlate acoustic data with visual observations for species and behavior confirmation.

Main Methods:

  • Deployed four autonomous acoustic recorders offshore southern California at ~800 m depth.
  • Conducted concurrent fixed-point marine mammal visual surveys from a research platform.
  • Analyzed acoustic recordings to identify whistle and click activity and track dolphin movements.

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Main Results:

  • Observed three distinct acoustic activity patterns: daytime whistling, early night whistling/clicking, and late night clicking.
  • Tracked daytime whistling dolphins in tight groups at moderate speeds (~9 km/h).
  • Early night recordings showed wider spatial distribution and slower movement, suggesting foraging.

Conclusions:

  • Dolphin acoustic activity and movement patterns vary significantly between day and night.
  • Acoustic tracking provides valuable data for understanding dolphin ecology and behavior.
  • This methodology has potential for studying dolphin responses to environmental stimuli.