The international team of maritime biologists, led by experts from the US Woods Hole Oceanology Institute, found the first established scale of the Sharks. It was previously assumed that sharks could not produce voice due to lack of a swimming bladder. The study was published in the Royal Society Open Science (RSOS) scientific journal.
Scientists have found that young black sharks (Carcharhinus Melanopterus) make a high click of a high click when people take them.
To check whether this is a random phenomenon, biologists have placed sharks with underwater microphones in individual tanks. It turned out that all the individuals clicked when they touched, but over time the votes stopped. Probably sharks have been used to contact.
Scientists believe that the sound arises from the contact of the teeth. This species has plate structures instead of sharp teeth, which are adapted to traverse crayfish. A similar mechanism is observed to some rays and seamen, which also click when threatened.
Researchers believe that sounds can be a defensive reaction. Sharp clicks can confuse predators, giving fish to escape. At the same time, sharks do not listen to their signals, as they sound too high frequency to be perceived.
Further research will help to find out whether other types of shark use votes and what situations do it.
Translation of: Euromedia24.com
