Affiliation promotes the transmission of a social custom: handclasp grooming among captive chimpanzees

被引:57
作者
Bonnie, KE [1 ]
de Waal, FBM
机构
[1] Emory Univ, Dept Psychol, Atlanta, GA 30329 USA
[2] Yerkes Natl Primate Res Ctr, Living Links Ctr, Atlanta, GA 30329 USA
[3] Yerkes Natl Primate Ctr, Living Links, Atlanta, GA 30329 USA
关键词
chimpanzees; culture; handclasp grooming; social learning;
D O I
10.1007/s10329-005-0141-0
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Handclasp grooming is a unique social custom, known to occur regularly among some, but not all populations of chimpanzees (Pan troglodytes). As with other cultural behaviors, it is assumed that this distinctive grooming posture is learned socially by one individual from another. However, statistical comparisons among factors thought to influence how a behavior spreads within a group have never, to our knowledge, been conducted. In the present study, the origination and spread of handclasp grooming in a group of captive chimpanzees was followed throughout more than 1,500 h of observation over a period of 12 years. We report on the frequency, bout duration, and number and demography of performers throughout the study period, and compare these findings to those reported for wild populations. We predicted that dyads with strong affiliative ties, measured by time spent in proximity to and grooming one another, were likely to develop a handclasp grooming partnership during the study period. A quadratic assignment procedure was used to compare correlations among observed frequencies of grooming and proximity with handclasp grooming in all possible dyads within the group. As predicted, the formation of new handclasp grooming dyads was positively correlated with the rate of overall grooming and proximity within a dyad. In addition, in nearly all dyads formed, at least one individual had been previously observed to handclasp groom. We concluded that affiliation and individual experience determines the transmission of handclasp grooming among captive chimpanzees.
引用
收藏
页码:27 / 34
页数:8
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