Journal
PRIMATES
Volume 42, Issue 4, Pages 319-326Publisher
SPRINGER-VERLAG TOKYO
DOI: 10.1007/BF02629623
Keywords
Callitrichidae; tool use; social transmission; environmental complexity; extractive foraging
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Two types of tool use were observed in eight captive, free-ranging golden lion tamarins (Leontopithecus rosalia rosalia). All eight individuals used twigs and/or radio collar antennae to pry bark from trees and probe crevices, presumably for invertebrates. Three individuals used tools for grooming. In two animals, antennae were used as grooming tools while the third individual used a stick while grooming. The complexity of the free-ranging environment may have played a role in the expression of tool use behavior in these animals, as tool use has never been observed in captive tamarins living in traditional enclosures or wild tamarins. Social transmission may be one of the mechanisms responsible for the acquisition of tool use - six of the eight tool users resided in two social groups, and the only two individuals that used antennae as grooming tools were a bonded pair. These are the first published observations of tool use by golden lion tamarins or any callitrichid in a non-experimental setting and provide further data supporting the theory of a link between extractive foraging and tool use.
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