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Long-term memory in frog-eating bats.

M May Dixon1, Patricia L Jones2, Michael J Ryan3

  • 1Smithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancón, Republic of Panamá; Department of Integrative Biology, University of Texas at Austin, 1 University Station C0930, Austin, TX, USA; Department of Ecology, Evolution, and Organismal Biology, The Ohio State University, Columbus, OH, USA.

Current Biology : CB
|June 21, 2022
PubMed
Summary
This summary is machine-generated.

Wild bats demonstrate remarkable long-term memory, retaining learned prey-finding sounds for up to four years. This extended memory suggests significant cognitive abilities and adaptive advantages for predators in their natural environments.

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Area of Science:

  • Cognitive neuroscience
  • Animal behavior
  • Ecology

Background:

  • Long-term memory offers survival benefits but incurs metabolic and cognitive costs.
  • Understanding memory duration in wild animals is crucial for assessing ecological niche exploitation.
  • Captive studies may not accurately reflect wild cognitive demands or brain function.

Purpose of the Study:

  • To investigate the duration of learned auditory memories in wild frog-eating bats (Trachops cirrhosus).
  • To assess the ecological relevance of long-term memory in a wild predator.
  • To explore potential cognitive abilities related to memory in bats.

Main Methods:

  • Wild bats were trained to associate novel acoustic cues with prey.
  • Trained bats were released and later re-captured after one to four years.
  • Re-tested bats' responses to learned cues were compared with naïve bats.

Main Results:

  • All previously trained bats (n=8) immediately responded to learned acoustic cues.
  • Naïve bats (n=17) showed minimal response to the same cues.
  • Evidence of memory generalization between sounds and rewards was observed over time.

Conclusions:

  • Frog-eating bats possess exceptionally long-term auditory memory, lasting up to four years.
  • This long-term memory likely aids in locating rare prey, conferring a predatory advantage.
  • The findings suggest sophisticated cognitive capabilities in bats previously underestimated.