Sea creatures that were thought to be silent and make secret sounds "talk"

A scientist has discovered that sea creatures previously thought to be silent can actually communicate with others.

According to scientist Gabriel Georgievich-Cohen, 53 sea creatures have been discovered that are able to constantly send messages, but people did not take the necessary steps to listen to them.

AndScientists use microphones to record viewsTurtles, including tortoises, have been found to communicate when they want to mate or hatch from an egg. The results claim to rewrite part of what we know about evolution.

The results show that all vertebrates that breathe through the nose and use sound to communicate descended from a single ancestor that existed 400 million years ago.

Georgievich-Cohen, a doctoral student at the University of Zurich in Switzerland, began his work with an intuition that marine animals could communicate by voice. He used audio and video equipment to record 53 domestic animal species around the world, including at Chester Zoo in England.

The creatures included 50 turtles, a tuatara (or totara, a type of lizard-like reptile), a lungfish, and a snake fish.

It was believed that all these animals were silent, but Georgievich-Cohen notes that they were not heard because their voices were difficult to catch.

“We know when a bird sings,” he explained. “You don’t need someone to tell you what it is. Some of these animals are very quiet or noisy every two days.”

Turtles, tuatara and lungfish, for for example, not mute, but have a wide and complex acoustic repertoire. Evolutionary origin of dates of voice communication back more than 400 million years.

– University of Zurich (@UZH_ru) October 25, 2022

Georgievich-Cohen added that people have a prejudice towards creatures that live on land, so they often ignore the study of underwater species.

Video recordings of noisy animals allowed Georgevich-Cohen to associate sound with specific behavior and distinguish it from episodic sounds that do not send messages.

“Sea turtles will sing from the inside of their eggs to synchronize their hatching. If they scream from inside, they all come out together,” he explained. Thus, they avoid being eaten by other creatures.

He said that Turtles also make sounds To indicate her desire to mate. Georgievich-Cohen also recorded the sounds of the toratras made to protect their lands. He then began to think about what his research had revealed about the evolution of noise-producing animals.

Using a technique called phylogenetic analysis, Georgievich-Cohen traced the relationship between noisy animals.

He concluded that all vertebrate voice communications originated from a single ancestor 400 million years ago, during the Devonian period, when most species lived underwater.

This contrasts with recent work that traced the communicative sounds of several different species 200 million years ago.

Source: Independent