A new addition to the toolbox: stone tool use in blonde capuchin monkeys (Sapajus flavius)
View abstract on PubMed
Summary
This summary is machine-generated.Blonde capuchin monkeys (Sapajus flavius) in the Caatinga dry forest use stone tools to crack open hard nuts and fruits. This discovery adds to the known tool-using primate behaviors and highlights species adaptability.
Area Of Science
- Primate behavior
- Ethology
- Primatology
Background
- Tool use is a significant aspect of primate evolution and behavior.
- Previous research documented tool use in capuchin monkeys, primarily for termite fishing.
- The blonde capuchin monkey (Sapajus flavius) was known for stick-fishing but not stone tool use.
Purpose Of The Study
- To present the first evidence of stone tool use by blonde capuchin monkeys (Sapajus flavius).
- To document the dimensions and weight of the stone tools used.
- To identify the food resources exploited using these tools.
Main Methods
- Field observations were conducted in three areas of the Caatinga dry forest.
- Stone tools (hammers and anvils) were measured for weight and dimensions.
- Associated food items (fruits and nuts) were identified near anvil sites.
- Instances of tool use were passively observed.
Main Results
- The mean weight of hammer stones was 475.7 g.
- Anvil stones had a mean height of 48.3 cm and a surface area of 1.2 m².
- Observed tool use involved cracking Prunus dulces, Cnidoscolus quercifolius, and Syagrus coronate.
- Six instances of stone tool use were documented, similar to Sapajus libidinosus.
Conclusions
- Blonde capuchin monkeys (Sapajus flavius) utilize stone tools, expanding the known repertoire of this species.
- This behavior demonstrates adaptability in exploiting resources within the Caatinga ecosystem.
- Further research is needed to understand seasonal patterns and influencing factors on stone tool use.

