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According to a new study, Southern Right Whales females "whisper" to their offspring so as not to be submerged by their killer whale cousins.
Mothers and whalers are hiding from predators as they gravitate towards the troubled waters near the coast. Here, they shelter in the noisy surf, stay close and whisper effectively – calling gently less once per dive – to avoid attracting unwanted attention, revealed L & # 39; study.
When scientists analyzed the volume of calls from animals, they were surprised by the calm moos and grunts.
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According to a study published in the newspaper, breaking waves submerged calls within a radius of a few hundred meters. It is therefore difficult for killer whales to spy on informal conversations. Journal of Experimental Biology.
"One of the first challenges was getting to know the whales in our study area," said Dr. Mia Nielsen of Aarhus University in Denmark, whose team visited the breeding grounds. whales in Flinders Bay, south of Western Australia.
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The contractors rid the body of one of the dead sperm whales that were thrown on a beach near Gibraltar Point in Skegness, Lincolnshire in 2016.
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People pass by a stranded whale at Pointe de la Torche, near Brest, France, November 29, 2011
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A fin whale opens his mouth while he is stranded and alive on Carlyon Bay Beach, Cornwall, August 13, 2012
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The lower jaw of a dead sperm whale that was stranded on a beach in Hunstanton, Norfolk on February 5, 2016
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One of five sperm whales found stranded on beaches near Skegness, Lincolnshire, on the weekend of January 25, 2016
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Employees at work to skin the remains of a whale stranded on January 25, 2013
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Two pilot whales are stranded on a beach in Calais, city of northern France, November 2, 2015
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A sperm whale lies dead after being stranded on a beach in Hunstanton, Norfolk on February 5, 2016
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Crowds gather while a sperm whale died after being stranded on a beach in Hunstanton, Norfolk on February 5, 2016
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A sperm whale is found on Hunstanton Beach in Norfolk on February 5, 2016
AFP / Getty
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Volunteers dump buckets of water on the 80 live pilot whales found stranded on an isolated beach at Ocean Beach on the southernmost island of New Zealand, on January 8, 2003.
AFP / Getty
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The contractors rid the body of one of the dead sperm whales that were thrown on a beach near Gibraltar Point in Skegness, Lincolnshire in 2016.
Pennsylvania
4/15
People pass by a stranded whale at Pointe de la Torche, near Brest, France, November 29, 2011
AFP / Getty
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A woman touches the tail of a large whale carcass on Wattamola Beach in Royal Sydney National Park on September 25, 2018
AFP / Getty
6/15
Humpback whale stranded in California, 2015
AFP / Getty
7/15
Great fin whales died at Hamelin Bay on the west coast of Australia on March 23, 2009
AFP / Getty
8/15
An 18-meter sperm whale died on Sutton Bridge Beach in The Wash, off the coast of Lincolnshire, where it failed in 2004
Pennsylvania
9/15
A fin whale opens his mouth while he is stranded and alive on Carlyon Bay Beach, Cornwall, August 13, 2012
Getty
10/15
The lower jaw of a dead sperm whale that was stranded on a beach in Hunstanton, Norfolk on February 5, 2016
Getty
11/15
One of five sperm whales found stranded on beaches near Skegness, Lincolnshire, on the weekend of January 25, 2016
Getty
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Employees at work to skin the remains of a whale stranded on January 25, 2013
AFP / Getty
13/15
Two pilot whales are stranded on a beach in Calais, city of northern France, November 2, 2015
AFP / Getty
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A sperm whale lies dead after being stranded on a beach in Hunstanton, Norfolk on February 5, 2016
Getty
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Crowds gather while a sperm whale died after being stranded on a beach in Hunstanton, Norfolk on February 5, 2016
Getty
The researchers stealthily approached whales while they rested on the surface and fixed sound recording tags that remained on the mothers on average for seven hours but remained attached to the calf for 40 minutes.
Dr. Nielsen said, "Right whales in the South are very physical with each other, calves spend a lot of time rubbing against the mother and rolling over her back, tail and rostrum."
After scoring nine whales, the team recorded 63 hours of conversations.
"It was difficult to assign calls to the calf or the mother because they are so close to each other," said Dr. Nielsen.
Although they are five to eight meters long, southern right whale calves are vulnerable to attack. The study found that low-amplitude calls reduced the risk of "alerting killer whales through eager eavesdropping of the location of newborn calf, suggesting that this acoustic cryptography could have become an anti-predator strategy. "
Right whales are so named because they were considered the "right whale" to hunt at the time of commercial whaling.
They could often be caught near the coast and would be a reliable source of whale oil, a valuable commodity of the time.
These characteristics have led to the decimation of the population and it has struggled to rebuild since.
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