Dolphins may be closer to humans than previously realised, with new research showing they communicate by whistling out their own 'names'. The research was carried out by Vincent Janik of the Sea Mammal Research Unit at St Andrews University. He said: Each animal develops an individually distinctive signature whistle in the first few months of its life, which appears to be used in individual recognition." The research has its origin in the 1960s when dolphin trainers first noticed that captive animals each had their own personal repertoire of whistles. Janik's work was based on a group of dolphins living in Sarasota Bay, Florida, who have been studied for more than 30 years. The findings are supported by other authorities. Denise Herzing, research director at the Wild Dolphin Project at Florida Atlantic University, said it was already clear that many of the 77 known cetacean (whale and dolphin) species had rudimentary languages. "We know that dolphins brains are nearly as large and complex, relative to body size, as those of humans."
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