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Related Experiment Video

Updated: May 9, 2026

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation

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Published on: August 18, 2014

Decades-long social memory in bottlenose dolphins.

Jason N Bruck¹

¹Department of Comparative Human Development, Institute for Mind and Biology, University of Chicago, Chicago, IL 60637, USA. jbruck@uchicago.edu

Proceedings. Biological Sciences

|August 9, 2013

Summary

Dolphins can remember familiar individuals for at least 20 years, demonstrating lifelong social memory. This cognitive capacity is crucial for navigating complex social dynamics in their fluid environment.

Keywords:

cognition long-term memory signature whistles social memory

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Area of Science:

Marine biology
Animal cognition
Behavioral ecology

Background:

Long-term social memory is vital for understanding social relationships and cognitive abilities.
In dolphins, memory for conspecifics aids in assessing social threats and alliances within complex social structures.

Purpose of the Study:

To investigate the duration of long-term social memory in bottlenose dolphins.
To assess the potential for lifelong recognition of former social partners.

Main Methods:

A playback study was conducted within a multi-institution dolphin breeding consortium.
Researchers assessed recognition of familiar versus unfamiliar signature whistles of former tank mates.

Main Results:

Dolphins demonstrated the capacity for lifelong memory of conspecifics.
Recognition persisted regardless of relatedness, sex, or duration of prior association.
This study is the first to show social recognition lasting at least 20 years in a non-human species.

Conclusions:

Dolphins possess the potential for lifelong social memory.
This finding suggests a link between complex sociality and cognitive capacity, as seen in humans and elephants.
Long-term social memory is essential for survival and social navigation in fluid social systems.