There may be whole mental lives of dolphins that we're just now beginning to discover, writes mebwriter
Dolphins can recognize other dolphins they know from the taste of their urine alone and from the sound of their signature whistle.
However, it was not known whether dolphins could use signature whistles the way that humans use names; that is, as a representational label . First, Bruck and his colleagues presented dolphins with urine samples from familiar and unfamiliar dolphins. They found that dolphins spent about three times as long sampling urine from familiar individuals compared with urine from strangers. A similar preference for familiar over unfamiliar has been previously reported for signature whistles.
“We may find that oil spills, the chemicals we use to disperse oil, chemical run-off, and other human effects may impede dolphins’ natural ability to chemically signal to one another,” he says. “This might prevent males from identifying reproductively capable females or diminish dolphins’ abilities to recognize individuals.”
France Dernières Nouvelles, France Actualités
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