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Novel object recognition in Octopus maya.

Fabian Vergara-Ovalle1, Fructuoso Ayala-Guerrero2, Carlos Rosas3

  • 1Neuropsychopharmacology Laboratory, Psychology School, Universidad Nacional Autónoma de México, colonia copilco universidad, Avenida Universidad 3000, 1er Piso Edif. B. Cub B001, Alcaldía de Coyoacan, Ciudad Universitaria, Coyoacán, CP 04510, Mexico City, Mexico.

Animal Cognition
|February 22, 2023
PubMed
Summary

Octopus maya subjects older than one month demonstrate novel object recognition, similar to vertebrates. This study validates the Novel Object Recognition (NOR) task for invertebrate memory research.

Keywords:
BehaviorExplorationMemoryNovel objectOctopusRecognition

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Area of Science:

  • Cognitive Neuroscience
  • Comparative Psychology
  • Marine Biology

Background:

  • The Novel Object Recognition (NOR) task is a standard for studying memory in vertebrates.
  • While cephalopods show object recognition, the NOR task has not been applied to study memory phases in these invertebrates.
  • This research aims to bridge this gap by investigating object recognition memory in Octopus maya.

Purpose of the Study:

  • To determine if Octopus maya can perform the Novel Object Recognition (NOR) task.
  • To investigate the developmental trajectory of object recognition memory in Octopus maya.
  • To compare invertebrate NOR performance with established vertebrate models.

Main Methods:

  • The study utilized Octopus maya subjects of varying ages (one month, two months, and older).
  • Subjects were exposed to novel and familiar objects in a controlled environment.
  • Behavioral responses, including visual and tactile exploration, were recorded and analyzed.

Main Results:

  • Octopus maya subjects aged two months and older successfully differentiated between novel and familiar objects.
  • One-month-old Octopus maya subjects did not exhibit novel object recognition.
  • Exploration strategies differed: new objects involved both visual and tactile investigation, while familiar objects were primarily explored visually.

Conclusions:

  • Octopus maya demonstrates novel object recognition capabilities comparable to vertebrates.
  • Age is a critical factor in the development of object recognition memory in this species.
  • This study provides a framework for future research on invertebrate memory and its evolutionary development.