mother's call is one of theearliest and most important life lessons for a dolphin calf
judy
www.diecastingpartsupplier.com
2016-05-27 19:09:33
Recognising a mother's call is one of theearliest andmost important life lessons for a dolphin calf.
They can easily be separated from theirmothers inthe vast open ocean, so listening out for her callmeans they couldquickly reunite.
But just how early a calf learns itsmother's call was not fully understood. In a new study ofbottlenose dolphins,researchers listened in on two captive dolphin mothers to understandhowmother-calf recognition develops.They discovered that the mothers rapidlyincrease their unique "signature whistles" as soon asthe calf isborn. They whistle up to five times more than usual. But they also saw themothersdo something completely unexpected.
We were surprised at how strong the resultswere, says Stephanie King of the University ofWestern Australia, who led theresearch at the Dolphin Research Center, a sea pen facility inFlorida, US.We call this 'vocal imprinting', where thecalf imprints on its mother’ssignature whistle, saysKing.
It's an important learning phase where thecalf learns to recognise its mother, and it's importantthis happens quicklybefore mother-calf separations occur.
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