It is about Whale songs and is just a fabulous sound!
Last Friday there was an item on the BBC about whale song. It appears I can publish the article for you all. It is my choice over my regular Sunday Picture Parade. I hope you agree! Update: The track just 26 seconds long cannot be reproduced in this post.
ooOOoo
Whale song mystery solved by scientists
21 February 2024, By Helen Briggs and Victoria Gill,Science correspondents, BBC News
Humpback whale song (For whatever reason the track cannot be listened to on this blog. That is a great shame as the song is magnificent. So please go to the BBC website for this; the link is https://www.bbc.com/news/science-environment-68358414 )
Baleen whales are a group of 14 species, including the blue, humpback, right, minke and gray whale. Instead of teeth, the animals have plates of what is called baleen, through which they sieve huge mouthfuls of tiny creatures from the water.
Exactly how they produce complex, often haunting songs has been a mystery until now. Prof Elemans said it was “super-exciting” to have figured it out.
He and his colleagues carried out experiments using larynxes, or “voice boxes”, that had been carefully removed from three carcasses of stranded whales – a minke, a humpback and a sei whale. They then blew air through the massive structures to produce the sound.
In humans, our voices come from vibrations when air passes over structures called vocal folds in our throat. Baleen whales, instead, have a large U-shaped structure with a cushion of fat at the top of the larynx.
This vocal anatomy allows the animals to sing by recycling air, and it prevents water from being inhaled.
The researchers produced computer models of the sounds and showed that baleen whale song is restricted to a narrow frequency which overlaps with noise produced by shipping vessels.
“They cannot simply choose to, for example, sing higher to avoid the noise we make in the ocean,” explained Prof Elemans.
His study demonstrated how our ocean noise could prevent whales from communicating over long distances. That knowledge could be vital for the conservation of humpbacks, blue whales and other endangered giants of the sea.
It also provides insight into questions that researchers have been asking for decades about these eerie songs, which some sailors used to attribute to ghosts or mythical sea creatures.
Whale communication expert Dr Kate Stafford, from Oregon State University, called the study “groundbreaking”.
“The production and reception of sound is the most important sense for marine mammals, so any studies that elucidate how they make sounds has the potential to move the field forward,” she told BBC News.
The research also paints an evolutionary picture – of how the ancestors of whales returned to the oceans from the land, and the adaptations that made it possible to communicate underwater.
The way so-called toothed whales produce sound is better understood, because the animals are easier to study. These marine mammals, which include dolphins, orcas, sperm whales and porpoises, blow air through a special structure in their nasal passages.
Dr Ellen Garland, from the Sea Mammal Research Unit at the University of St Andrews, said: “I’ve always wondered exactly how baleen whales – especially humpbacks, which my research is focused on – actually produce the variety of sounds they do.
“Studying large whales is extremely challenging at the best of times, but trying to uncover how they produce sound when you may not even be able to see them underwater while vocalising is an added level of difficulty, so these researchers have been very creative.”
Dr Stafford added that the mammals’ ability to make such complex vocal signals was “remarkable” and highlighted “how special these animals are”.
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There! I do hope you all agree that this was very worthwhile. Plus, you all got to listen to those twenty-six seconds of the very beautiful sound.
“Listening to Whales” by Alexandra Morton is well worth a read. She spent years bobbing about on the ocean with a hydrophone recording and listening to hundreds if not thousands of hours to different whales and dolphins chatting and singing beneath the water.
Equally brilliant is the book “Orca: The Whale called Killer” by Erich Hoyt whose career began as a musician and sound engineer before he was tasked with going out on a small boat to record wild orca off the coast of British Columbia. Amazing creatures. 🙂
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Thank you for your contribution; I’m sorry I didn’t reply reply earlier. Those sound like wonderful books and I am tempted to get them despite me really needing to slim down on my stock. Let me see what other details are available online.
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