6/22/2023 0 Comments Chimpanzee hand clasp![]() At least 30 years have passed since groups were first observed, however and 16 independent populations can be labelled as GHC-disposed nowadays.Įxpansion of this distinctive behaviour being key, it was also important that over the period of study, naive chimpanzees took on the cultural style of their groups. ![]() The history of the behaviour in these groups goes back at least 9 years, thanks to previous studies. The one-year interval between two concentrated studies was useful in establishing the stability of the style differences. Grooming handclasp style examples: (a) palm-to-palm, (b) wrist-to-wrist Credit: © Proceedings of the Royal Society B: Biological Sciences Group one preferred the wrist to wrist technique (b) while group two tended to use the palm to palm style (a): Most individuals of the groups performed the behaviour, with stable differences between individuals. The fourth group never engaged in any hand clasping, just like the Gombe animals. ![]() Two groups of the four used regularly performed the GHC while one group did begin a little clasping after the experimental period. The mother is often the first to handclasp with her infant, indicating that behaviour will be passed on through the maternal line. Interestingly, the well-known Gombe chimpanzees of Jane Goodall fame do not engage in GHC. Two individual chimpanzees extend one arm overhead and clasp each other's upraised hands while grooming each other with the other arm. GHC or the Grooming Hand Clasp is the mark of social greeting used by researchers (not literally) to investigate cultural differences between the communities. The communities of chimpanzee, Pan troglodytes, that inhabit the Chimfunshi Wildlife Orphanage Trust in Zambia are genetically similar and live in four neighbouring communities, in the case of the animals chosen here.
0 Comments
Leave a Reply. |