منابع مشابه
Variable grooming behaviours in wild chimpanzees.
Wild chimpanzees, Pan troglodytes, show regional differences in feeding [Boesch and Boesch-Achermann, 2000], tool using [McGrew, 1992], grooming [Nakamura et al., 2000], courtship [Nishida et al., 1999] and vocal communication [Mitani et al., 1992]. Comparisons have revealed at least 39 behavioural differences among chimpanzee populations [Whiten et al., 1999]. Here we add to that list by repor...
متن کاملPropagation of handclasp grooming among captive chimpanzees.
A grooming posture previously reported for two wild chimpanzee (Pan troglodytes) communities developed spontaneously in a captive group of the same species. This offered a unique opportunity to follow the propagation of a new social custom. The posture consists of two partners grasping hands--either both right hands or both left hands--and raising the arms in an A-frame above their heads while ...
متن کاملDYNAMICS OF GROOMING AND GROOMING RECIPROCATION IN A GROUP OF CAPTIVE CHIMPANZEES (pAN TROGLODYTES)
Grooming relationships between adult male chimpanzees are often reciprocal, i.e. individuals receive grooming from those they groom. Grooming may be reciprocated at the same time it is received (mutual grooming), or later within the same grooming session. Alternatively, it can be reciprocated at a much later stage, in another session. An analysis of individual grooming sessions at the dyadic le...
متن کاملLong-term reciprocation of grooming in wild West African chimpanzees.
Humans are well known for their ability to keep track of social debts over extended periods of time, and for their tendency to preferentially cooperate with closely bonded partners. Non-human primates have been shown to cooperate with kin and non-kin, and reciprocate helpful acts. However, there is ongoing debate over whether they keep track of previous interactions and, if so, whether they can...
متن کاملBystanders, parcelling, and an absence of trust in the grooming interactions of wild male chimpanzees
The evolution of cooperation remains a central issue in socio-biology with the fundamental problem of how individuals minimize the risks of being short-changed ('cheated') should their behavioural investment in another not be returned. Economic decisions that individuals make during interactions may depend upon the presence of potential partners nearby, which offers co operators a temptation to...
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ژورنال
عنوان ژورنال: Pan Africa News
سال: 1996
ISSN: 1884-751X
DOI: 10.5134/143340