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Area of Science:

  • Animal Cognition
  • Behavioral Ecology
  • Insect Neuroscience

Background:

  • Understanding numerical cognition in non-human animals provides insights into the evolution of counting.
  • Honeybees (Apis mellifera) are complex social insects with sophisticated navigation and communication abilities.
  • Previous research suggests bees can discriminate quantities, but the mechanisms remain debated.

Purpose of the Study:

  • To investigate the sequential counting abilities of honeybees.
  • To determine if honeybees can perform object-independent counting.
  • To elucidate the role of sequential landmark counting in honeybee navigation.

Main Methods:

  • Honeybees were trained to associate a food reward with passing a specific number of sequential landmarks.
  • The distance to the food reward was randomized to eliminate distance-based cues.
  • Novel objects were introduced to test for object independence in counting.

Main Results:

  • Honeybees successfully counted up to four sequential landmarks.
  • Bees demonstrated object-independent counting, recognizing novel objects in the sequence.
  • The counting ability was primarily sequential, suggesting a running count mechanism.

Conclusions:

  • Honeybees possess a sequential counting ability for up to four landmarks.
  • This counting is object-independent, highlighting cognitive flexibility.
  • Sequential landmark counting appears to be a strategy used by bees for navigating to food sources.