For a long time, sharks are believed to have been silent, as they depend on the ghost to search for their prey and avoid predators. But now, Sharks It was recorded for the first time.
New records reveal that unique sharks (MUSTELUS LENTICULAS-Small sharks in New Zealand-distinct clicks when dealing with underwater researchers. These voices were consistent and repeated across multiple individuals, and they may have been related to distress or defensive responses, According to the study It was published on Wednesday (March 26) in the Royal Open Association.
Records are the first known case of Arash, actively producing. “Sharks have more accurate sensory systems than hearing, such as their electronic receptors, smell and how to pay them through water,” the author of the study in the study Caroline belowA researcher at the Woods Hall Institute for Oceanic Sciences said for direct science. “But I think the original idea is that we have this sound is not important at all, it is also possible to be incorrect.”
Ten sharks are observed from events panels and they made sounds by chance during routine behavioral experiences at the Lig Marin Laboratory at Oakland University. When they are briefly handled by underwater researchers, all ten sharks produced audible clicks.
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Nider said that these clicks were very frequent during the first few courses, but then stopped with the progress of experiences. “They may not have been afraid of their lives anymore,” she said, adding that in wild clicks, loud clicks may be a distraction per second for sharks for events to escape when they are seized by predators.
Most sharks are believed to be silent because they lack the air-filled swimming pools are usually used by fish to make sounds. Microst surveying and 3D sharks have revealed any clear organs or structures for sound production.
The team suggested that the sounds can come from the sharks that pick up their teeth.
Mobile sharks contain wide teeth, arranged in tightly packed configurations, similar to panels, which are ideal for crushing prey with solid pieces such as crabs. The researchers said that this “pavement teeth” may serve a second function to produce noise when the jaws are closed.
However, NIEDER indicated that without direct control of the shark cousins while producing click, the mechanism remains speculative.
Each click lasted about 48 milliliters, with storage units sometimes exceeding 155 decibels, which can be compared to the bang of gun.
Almost three quarters of the clicks were one explosions, while the rest were short double clicks. Scientists have noted that about 70 % of these clicks were accompanied by calm body movements, but a few of any visible movement occurred at all.
Whether clicking is a transverse secondary result of dealing or purposeful behavior that is still unknown.
The shark’s hearing range largely decreases largely 1 kHz, which is much lower than the clicks, which means that it is unlikely that the clicks are dedicated to communicating with other sharks.
However, some well -known predators for unique sharks, such as New Zealand FurArctoCephalus Forsteri), Sensitive to the higher frequencies and may be amazing or confusion between sharp clicks.
It is also known that many types of rays and signs – sharks relatives – produce clicks when disturbed by divers. These sounds are believed to be a distress warning or calls.
Nideri said that future studies can target closely related shark types to investigate whether they are also able to make noise, and whether noise in response to tension.
Adrian GotridgeThe biologist in sharks with a group of shark specialist IUCN, which did not participate in the study, said that more research is needed to determine what sharks are the clicks of shark and what it can mean.
“It is too early to know if it is a reaction, a kind of saying,” stay away “or if [it’s] “Their nervous system shoots, which is only happening to make their teeth and jaws click,” said Live Science.
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