Turtles (Pseudemys nelsoni) learn about visual cues indicating food from experienced turtles

Area of Science:

• Ethology
• Animal Behavior
• Cognitive Ecology

Background:

• Social learning, the process of learning by observing others, is crucial for adaptation in many species.
• While extensively studied in mammals and birds, social learning in reptiles, particularly aquatic species, remains largely unexplored.

Purpose of the Study:

• To investigate social learning in the turtle species Pseudemys nelsoni.
• To determine if observer turtles could learn a visual object cue for food reinforcement by observing trained conspecifics.
• To identify the specific mechanisms of social learning, such as stimulus enhancement, goal emulation, or copying.

Main Methods:

• A three-part task was designed to assess learning in observer turtles.
• Observer turtles had direct access to trained demonstrators during training trials.
• Learning was evaluated by observing if turtles could follow demonstrators and approach the correct stimulus independently.

Main Results:

• All four tested Pseudemys nelsoni turtles demonstrated learning through observation.
• Turtles learned to follow demonstrators to a food-associated visual cue.
• Turtles independently approached the correct stimulus regardless of its spatial position, indicating stimulus enhancement.

Conclusions:

• Pseudemys nelsoni exhibit stimulus enhancement, a form of social learning.
• This study provides the first experimental evidence of social learning capabilities in any aquatic reptile.
• These findings highlight the cognitive flexibility and social learning potential in turtles.