Figure 1
From: Tool transfers are a form of teaching among chimpanzees
Changes in termite gathering from before to after tool transfer.
The number of seconds spent using tools to gather termites decreased for the donor (n = 26, Fig. 1a) after relinquishing a probe to another chimpanzee (recipient, n = 24), whose time spent termite fishing increased (Fig. 1b). The number of fishing probe insertions also decreased for the donor (n = 17, Fig. 1c) and increased for the recipient (n = 15, Fig. 1d). Finally, the number of feeding events decreased for the donor (n = 15, Fig. 1e) and increased for the recipient (n = 14, Fig. 1f) after the transfers. Observations of the same individual or event, respectively, are denoted by a pair of points connected by a dashed line. Averages are shown for individuals with multiple observations. Tied observations (at least two individuals with the exact same value of the response) are denoted by larger points (whereby the area of the points codes the number of individuals; thicker lines have the corresponding meaning for the connections). n = number of transfers.
