Humpback whales sing increasingly complex songs, but University of Queensland researchers have discovered they may suddenly switch to something simpler, in a 'cultural revolution'.

The study examined the structure and complexity of songs sung by the eastern Australian humpback whale population over 13 consecutive years.

Dr Jenny Allen from UQ's Cetacean Ecology and Acoustics Laboratory said members of humpback whale populations were known to sing the same song at any one time.

"Typically, these songs changed gradually, possibly through embellishments by individual singers," Dr Allen said.

"We suspect the embellishments allow bulls to stand out from their peers, much like teenage boys trying to stand out from the crowd.

"But every few years the songs are replaced - always by something simpler - suggesting there is a limit to the whales' capacity to learn new material."

Dr Allen said humpback whales provided a good model for cultural learning in animals, as they learned and spread their songs quickly over entire populations and even ocean basins.

"This is cultural transmission on a scale comparable to what we find in people," she said.

"By learning more about culture and social learning in animal species such as humpback whales, we can gain a better understanding of what led to its development, and what evolutionary value it holds.

"By answering these questions in animals, we might be able to clarify why cultural and social development has occurred to such a unique degree in humans."

Research paper

Related Links
University of Queensland
Follow the Whaling Debate

Tweet

Thanks for being here; We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain. With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords. Our news coverage takes time and effort to publish 365 days a year. If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor $5 Billed Once credit card or paypal		SpaceDaily Monthly Supporter $5 Billed Monthly paypal only

145 whales die on remote New Zealand beach
Wellington (AFP) Nov 26, 2018
Up to 145 pilot whales have died in a mass stranding in a remote part of New Zealand, with authorities saying Monday they made the "heart-breaking" decision to euthanise dozens that lay stricken on the shore. The stranding was discovered by a hiker late Saturday on Stewart Island, 30 kilometres (19 miles) off the southern coast of the South Island. Half of the whales were already dead and due to the condition of the remaining whales and the remote, difficult-to-access location, the decision was ... read more