Journal
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
Volume 272, Issue 1559, Pages 135-140Publisher
ROYAL SOC
DOI: 10.1098/rspb.2004.2937
Keywords
dolphin; feeding; cooperation; division of labour
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Individual role specialization during group hunting is extremely rare in mammals. Observations on two groups of bottlenose dolphins (Tursiops truncatus) in Cedar Key, Florida revealed distinctive behavioural roles during group feeding. In each group, one individual was consistently the 'driver', herding the fishes in a circle toward the remaining 'barrier' dolphins. Aerial fish-capture rates differed between groups, as well as between the driver and barrier dolphins, in one group but not in the other. These differences between the two groups may reflect differences in group stability or in prey school size.
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