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Related Experiment Videos

Risso's dolphins plan foraging dives.

Patricia Arranz1,2, Kelly J Benoit-Bird3, Brandon L Southall4,5

  • 1Sea Mammal Research Unit, School of Biology, University of St Andrews, East Sands, St Andrews KY16 8LB, UK arranz@ull.es.

The Journal of Experimental Biology
|March 2, 2018
PubMed
Summary

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This summary is machine-generated.

Risso's dolphins exhibit advanced planning by adjusting dive strategies based on prey location and quality. They use spatial memory from foraging dives to inform future hunting expeditions, demonstrating complex decision-making in the wild.

Area of Science:

  • Marine Biology
  • Animal Behavior
  • Cognitive Ecology

Background:

  • Animal foraging behavior in the wild is less understood than in lab settings.
  • Breath-hold divers must plan dives due to oxygen constraints.
  • Planning abilities are crucial for animals like Risso's dolphins to optimize foraging.

Purpose of the Study:

  • To investigate planning abilities in wild Risso's dolphins during foraging dives.
  • To understand how dolphins adjust search strategies based on prey distribution and memory.

Main Methods:

  • Equipped Risso's dolphins with sound-and-motion recording tags.
  • Analyzed echolocation data to understand search strategies.
  • Integrated dolphin data with underwater vehicle echosounder prey data.
Keywords:
Animal decision makingEpisodic-like memoryForaging behaviourGrampus griseusPerceptual rangePredator–prey dynamics

Related Experiment Videos

Main Results:

  • Dolphins adjusted echolocation ranges, suggesting depth-specific foraging plans.
  • Search ranges were modified within prey layers, indicating selective prey targeting.
  • Dolphins used information from current dives to plan subsequent foraging expeditions.

Conclusions:

  • Risso's dolphins demonstrate sophisticated planning in their foraging dives.
  • Spatial memory, updated through multi-modal prey sampling, modulates future dive plans.
  • Planning is essential for efficient foraging in dynamic marine environments.