Marine life

Study: Sperm Whales Develop Distinct Dialects in the Mediterranean

Is this proof of animal culture or just an acoustic curiosity unrelated to conservation?

Published JUN 24

#Marine life

Study: Sperm Whales Develop Distinct Dialects in the Mediterranean

Story

Above: Sperm Whale, Physeter catodon, Azores, Atlantic Ocean, Portugal. Image credit: Reinhard Dirscherl/ullstein bild/Getty Images

The Facts

A study published in the Proceedings of the Royal Society B found that sperm whales in the eastern and western Mediterranean use distinct rhythmic click patterns, known as codas, suggesting the emergence of two separate vocal dialects within the population.
ScienceAlert
Anadolu Agency
Researchers analyzed more than 5,000 whale codas recorded over 112 days between 2003 and 2021, drawing on hydrophone data collected near the Hellenic Trench off Greece and around Spain's Balearic Islands.
Guardian
PHYS
Western Mediterranean whales favored a slower 3+1 coda pattern, while eastern whales produced a faster version of the same sequence. Eastern whales were also occasionally recorded using the western dialect.
ScienceAlert
Anadolu Agency
The Mediterranean sperm whale population, estimated at a few thousand individuals, is considered endangered due to threats including fishing gear entanglement and ship strikes. Genetic data suggest the whales first entered the Mediterranean around 20,000 years ago.
Bioengineer.org
PHYS
The study's authors say dialect formation appears to be a slow process requiring some degree of population separation, a pattern also observed in human language development and birdsong dialects.
Guardian
GeneOnline
Lead researcher Taylor Hersh of the University of Bristol and co-author Luke Rendell of the University of St Andrews led the study, which they describe as offering new insight into how sperm whale vocal clans form over time.
Bioengineer.org
Royal Society Publishing

Sources Split

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ESTAB

The Spin

Narrative A

Mediterranean sperm whales are not only vocal but also culturally advanced. Distinct click dialects have emerged among eastern and western populations over thousands of years of isolation, revealing insights into animal culture. This underscores that cultural evolution isn't unique to humans and highlights the need for protective measures for these endangered creatures.

Anadolu Agency

Guardian

ScienceAlert

Narrative B

Two decades of acoustic data reveal that Mediterranean sperm whales are evolving new dialects while retaining ancestral ones, showcasing more complex cultural transmission at sea. Eastern whales near the Hellenic Trench have developed a faster coda variation but still revert to the older western form, highlighting their deep cultural memory. Ignoring this vocal complexity in conservation strategies could hinder efforts to protect these endangered animals.