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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."
Alongside the submarines, ships and airplanes participating in large-scale military exercises in the Pacific this month, a team of sea lions and dolphins are expected to patrol the sea. These marine animals will be flown in from San Diego for simulated mine recovery and mine detection during the biennial RIMPAC war games. Six bottle-nosed dolphins would find the mines, while four California sea lions would help recover them. High-tech gadgets deployed by the military can't match the natural skills of the dolphins and sea lions. Sea lions have "incredibly good underwater hearing" and can dive to 1,000 feet to attach a recovery line to a simulated mine, he said. Dolphins use their sonar to find the mines. Marine mammals have been used by the Navy since the early 1960s. The animals save the Navy an estimated $1 million a year. The $15 million Marine Mammal Program has 75 dolphins and 30 sea lions at its San Diego facility. Opponents of the program say the military should not train animals for use in warfare.
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