After all, their sharks are not quiet

It has a shell to go with at least one shark species biting. Scientists, who were the first among an animal group, once thought to be completely silent, can make click sounds.

During his doctoral research at the University of Auckland in New Zealand, Carolin NederNow he was hearing the sharks at the Woods Hole Occupation Institute in Massachusetts. While dealing with sharks during the experiments, he noticed some kind – a Houndshark called equipment (Mustelus Lenticulatus) – It seemed like metallic click sounds.

Neder says, “I was just ignoring because their sharks shouldn’t make a sound,” he says. “And it just continued to be.”

A world full of bird chirping shows the mammal scream, as well as its ability to produce sound is deliberately common among the black vertebrates. However, under water, many fish objects scraping or trembled their muscles, and in 2022 researchers, some rays – close relatives of sharks – close relatives – he said they would click when they are disturbed by divers. No shark sound has yet been officially defined.

To confirm the existence of the noise of the equipment, and his colleagues brought 10 children’s equipment caught in the waters on the northern island of New Zealand. There, they were placed in tanks with sensitive voice recording tools. The team slightly handled the sharks and found that they all made a click noise in response. It seems like the first shark known to produce sounds that are not associated with other actions such as equipment, nutrition or impact.

Researchers think that their sharks can produce sounds by bringing their jaws together. Like click rays, equipment straightening the teeth, which can create a sharp sound on the impact. Listen below.

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More research can verify if it has a source of click and has a function. Nieder points out that equipment is a small shark and potential prey for larger animals, so when the animal is bitten or grasped, clicking may have a role in defense.

“It could be to direct the predator, or he says. It is also possible to have a role in hunting, such as scare or disturbing the shells of sharks.

“This is a long -over, but potentially important shark biology field,” he says. Aaron Rice At the University of Cornell in New York, which is not included in the research.

If the sound production is common between sharks, it may be useful to examine the decreasing population, which usually clicks, says Rice. There is a great sound data that can be recorded in fish and whale works that may have caught shark sounds. They can be used to determine whether the sharks are in the area and adds another tool to monitor imperial predators.

“[The finding] It really represents the new discovery in the basic biology, Rice says Rice. “ He emphasizes that there is a lot we don’t know about the ocean. “