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Distress call of the bottlenose dolphin: stimuli and evoked behavioral responses.

Analysis of the many different vocal productions of pairs of bottlenose dolphins (Tursiops truncatus Montagu) and the related behavior patterns shows that one pair of specific short (0.2 to 0.6 second) whistles was consistently stimulated by physical distress. This call stimulated nearby animals to push the head of the distressed animal to the surface to breathe. After the animal breathed, a vocal exchange preceded other forms of aid.

Animals↗

VISUAL PROBLEM-SOLVING IN A BOTTLENOSE DOLPHIN.

A captive 8-year-old dolphin, well adapted to contact with human beings, was tested by the discrimination method for underwater perception of visual forms or patterns. The animal successfully discriminated 21 of the 25 pairs of stimuli presented. After having learned a particular combination, the dolphin was immediately able to respond to different but related pairs which had been modified in various ways. The memory of the animal for discriminations previously made was excellent.

Animals↗