Mediterranean Sperm Whale Vocal Dialects Evolve Over Two Decades of Social Interaction

Researchers have identified evidence of cultural evolution in the vocal dialects of sperm whales living in the Mediterranean Sea, according to a study published in the *Proceedings of the Royal Society B: Biological Sciences*. The findings, which stem from a meta-analysis covering two decades of data, indicate that these marine mammals adapt their communication patterns over time.

The study tracks changes in the rhythmic patterns of clicks, known as codas, that sperm whales use to interact with one another. By analyzing acoustic data collected over the 20-year period, the researchers observed shifts in these vocalizations, suggesting that the whales modify their dialects as their social structures and environments change. This research highlights the role of cultural transmission in whale populations, demonstrating that these vocal behaviors are not static but evolve as the animals interact within their groups.

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Date: June 24, 2026

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GOAI