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Determining forward speed from accelerometer jiggle in aquatic environments.

David E Cade1, Kelly R Barr2, John Calambokidis3

  • 1Department of Biology, Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA davecade@stanford.edu.

The Journal of Experimental Biology
|December 2, 2017
PubMed
Summary
This summary is machine-generated.

A new method uses animal tag movement, called tag jiggle, to measure animal speed. This approach is device-independent and works on various marine animals, improving our understanding of their movement ecology.

Keywords:
BiologgingEnergetic costsFlow noiseHigh sample rate noiseTag jiggle

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Area of Science:

  • Animal movement ecology
  • Biologging technology
  • Bio-mechanics

Background:

  • Accurate measurement of animal speed is crucial for understanding energetics, locomotion, and foraging.
  • Current methods for measuring speed using animal-attached devices have limitations in universal applicability.

Purpose of the Study:

  • To present and evaluate a novel method for measuring animal forward speed.
  • To establish a relationship between tag jiggle (vibration amplitude) and animal speed.

Main Methods:

  • Developed a method relating forward speed to the stochastic motion (tag jiggle) of biologging devices.
  • Utilized high sample rate accelerometers to measure tag jiggle amplitude.
  • Validated the method in a flow tank and in situ on wild cetaceans using various tag types.

Main Results:

  • Tag jiggle amplitude increases exponentially with increasing animal speed.
  • The method was successfully tested on diverse biologging devices and wild cetaceans of varying sizes.
  • Demonstrated the technique's device-orientation independence.

Conclusions:

  • The tag jiggle method offers a robust and universally applicable approach to measuring animal speed.
  • This technique relies on commonly available sensors (pressure and accelerometer), enhancing its broad utility in biologging studies.
  • Provides a valuable tool for advancing research in animal movement, energetics, and behavior.