Female bottlenose dolphins change tone when addressing their young. article about it published In the Proceedings of the National Academy of Sciences.
The researchers studied the characteristic whistles of 19 mother dolphins in Florida when they were with their calves, and also when swimming alone or with other adults. “They use these whistles to communicate with each other. “Here I am, here I am,” they say periodically, says Laela Sayig, a marine biologist at the Woods Hole Institution of Oceanography (WHOI) in Massachusetts.
As it turned out, when the pup is whistled, the sound gets louder and the frequency range is wider than usual. This was true for all 19 subjects, for each mother in the study. Scientists have several working theories to explain this type of communication. According to one of them, such “limpness” is necessary in order to teach puppies to “speak” a full-fledged dolphin.
“It would make sense for such adaptations to emerge in bottlenose dolphins, which are long-lived species in which acoustic signals play a crucial role. The authors say that their puppies need to learn to pronounce many sounds in order to communicate.
According to another version, the main purpose of such signs is to draw attention to the mother, to show that the female is addressing her offspring.
Earlier to create An ancient Roman amphora with poems by the ancient poet Virgil was found in Cordoba.