期刊
ANIMAL BEHAVIOUR
卷 75, 期 -, 页码 1757-1770出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.anbehav.2007.09.036
关键词
altruism; chimpanzee; other-regarding preference; Pan troglodytes; prosocial behaviour
资金
- NCRR NIH HHS [U42 RR015090] Funding Source: Medline
- NIGMS NIH HHS [K12 GM000680] Funding Source: Medline
We conducted experiments on two populations of chimpanzees, Pan troglodytes, to determine whether they would take advantage of opportunities to provide food rewards to familiar group members at little cost to themselves. In both of the experiments described here, chimpanzees were able to deliver identical rewards to themselves and to other members of their social groups. We compared the chimpanzees' behaviour when they were paired with another chimpanzee and when they were alone. If chimpanzees are motivated to provide benefits to others, they are expected to consistently deliver rewards to others and to distinguish between the partner-present and partner-absent conditions. Results from both experiments indicate that our subjects were largely indifferent to the benefits they could provide to others. They were less likely to provide rewards to potential recipients as the experiment progressed, and all but one of the 18 subjects were as likely to deliver rewards to an empty enclosure as to an enclosure housing another chimpanzee. These results, in conjunction with similar results obtained in previous experiments, suggest that chimpanzees are not motivated by prosocial sentiments to provide food rewards to other group members. The Association for the Study of Animal Behaviour. Published by Elsevier Ltd.
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