The use of different tools to achieve a single goal is considered unique to human and primate technology. To unravel the origins of such complex behaviors, it is crucial to investigate tool use thatÂ
Although it is well documented that tool use can enable the utilization of novel resources, the fitness benefits associated with this innovative behavior are difficult to test. Using longitudinal data
1 Numerical values are the average proportions of individuals’ tool-use bouts in which the characteristic in the column header was recorded.2 The average tool size is calculated using a size index (Ta
Sea otters are well-known tool users, employing objects such as rocks or shells to break open invertebrate prey. We used a series of generalized linear mixed effect...
