Marmosets use specific 'names' for one another, study finds

Researchers have discovered that marmoset monkeys use specific vocalizations, referred to as "phee calls," to identify and communicate with one another, akin to how humans use names. This behavior, observed for the first time in non-human primates, is believed to enhance social cohesion within their small family groups, which is vital for their survival. The study, published in the journal Science, involved experiments with ten marmosets, where they were separated by a barrier and recorded their calls. The findings revealed that marmosets varied their calls initially but eventually settled on distinct calls for each individual, indicating a form of vocal labeling. This suggests that marmosets learn these vocalizations from family members, showcasing evidence of vocal learning. The research challenges previous assumptions that primate vocalizations are genetically predetermined and inflexible, hinting at a potential link to the evolution of human language. Experts note that while marmosets use a stereotypical call, they modulate its acoustic structure to create unique identifiers for each other, marking a significant step in understanding the communication capabilities of non-human primates.

- Marmosets use specific vocalizations similar to names for social interaction.

- This behavior enhances social cohesion and is crucial for their survival.

- The study provides evidence of vocal learning in marmosets.

- Findings challenge previous beliefs about the rigidity of primate vocalizations.

- The research may offer insights into the evolution of human language.