March 17, 2012 13:46
Marine biologists Vincent Janik (Vincent Janik) Quick and Nicola (Nicola Quick) from the University of St Andrews (University of St. Andrews) found that each dolphin has its own unique signal-whistle, like a name or sign, which he published at a meeting with other individuals.
Until recently, this phenomenon, scientists could study only in animals kept in captivity. Thus, the 2004 study found that a group of free-swimming bottlenose dolphins whistle really used as a name or signature. But information about how they use these sounds were scarce.
In 2006, scientists have suggested that dolphins are capable of assignment and name recognition. Studies have confirmed the theory that the individual whistles these mammals perceive it as names.
Scientists from the UK decided to thoroughly investigate the dolphins communicating with one another. "Dolphins are comparable to the great apes in their cognitive skills. That's all it has learned in captivity — explains Yanik. — We wanted to understand how dolphins use their capabilities to solve problems, not to set them by man. "
Biologists recorded "screams" of individuals with a microphone lowered to a depth of two meters. In the end it turned out that the dolphins used a special kind of whistling at a meeting with the other group. Another interesting fact: the signal-name serves only one individual from the group.
Dolphins usually emit a distinctive whistle, if the group were mixed together. Out of 11 such "talks" only two failed to unite groups. And only once Dolphins merged into the overall pack without first filing a signal.
According to Janik, that there could be several reasons for this: the group could be a leader, which is just "creates conversation," or the group may have been before that known to each other.
The results are the first of its kind. Understanding how dolphins use whistles, opens up many exciting opportunities for further research. "We know that dolphins are able to copy other whistle. What if they use signals to indicate the dolphin, which is not there, "talk" about it in the third person? "- Says Yanik.
Research article published in the journal Proceedings of the Royal Society B, reports "Vesti.ru."