publication . Other literature type . Article . 2016

Nut-cracking behaviour in wild-born, rehabilitated bonobos (Pan paniscus): a comprehensive study of hand-preference, hand grips and efficiency.

Johanna Neufuss; Tatyana Humle; Andrea Cremaschi; Tracy L. Kivell;
  • Published: 26 Aug 2016
  • Publisher: Wiley
  • Country: United Kingdom
There has been an enduring interest in primate tool-use and manipulative abilities, most often with the goal of providing insight into the evolution of human manual dexterity, right-hand preference, and what behaviours make humans unique. Chimpanzees (Pan troglodytes) are arguably the most well-studied tool-users amongst non-human primates, and are particularly well-known for their complex nut-cracking behaviour, which has been documented in several West African populations. However, their sister-taxon, the bonobos (Pan paniscus), rarely engage in even simple tool-use and are not known to nut-crack in the wild. Only a few studies have reported tool-use in captiv...
free text keywords: GN, QL, QM, Hand preference, Primate, biology.animal, biology, Ecology, Troglodytes, biology.organism_classification, Hammerstone, Bonobo, Oil palm, Zoology, Nut, Pan paniscus
Related Organizations
Funded by
The evolution of the human hand: grasping trees and tools
  • Funder: European Commission (EC)
  • Project Code: 336301
  • Funding stream: FP7 | SP2 | ERC

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Figure 1. Different hand grips used by the dominant hand during bonobo nut-cracking. Bonobo precision grips hold small and medium-sized hammerstones: (a) Pc1 grip; (b) Pc2 grip; (c) Pc3 grip. Novel precision finger/active palm grips typically used for small and medium-sized hammerstones: (d) PcApm4; (e) PcApm5; (f) PcApm6; (g) PcApm7; (h) PcApm8; (i) PcApm9.

Power grips were most commonly used to hold all hammerstones: (j) Pw1; (k) Pw2; (l) Pw3; (m) Pw4; (n) Pw5; (o) Pw6 (photographs by J. Neufuss).

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