Greater tool use diversity is associated with increased terrestriality in wild capuchin monkeys

Autor(es)

Falotico, Tiago ; Ottoni, Eduardo B.

• Tipo de documento: Artigo Científico
• Fonte: AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY; v. N/A, p. 6-pg., 2023-04-17.

Resumo

Terrestriality was an essential factor in human evolution. Hominins' extensive use of the ground allowed exploring a new range of environments and their objects, including new resources and potential tool raw materials. Capuchin monkeys are primarily arboreal primates but are also the most prolific tool users among platyrrhines, customarily using stone tools on the ground due to physical limitations and material availability.Objectives: Our goals were to (1) measure the terrestriality levels of a group of capuchin monkeys and (2) test the hypothesis that terrestriality has a positive effect on the stone tool use variability because the increased time on the ground would offer more opportunities to interact with the available stones, leading to more innovations of tool use behaviors. We predict a more diversified use of stone tools in the population with a higher degree of terrestriality.Materials and Methods: This study was on a group of capuchin monkeys (Sapajus libidinosus) at Serra da Capivara National Park (SCNP), Brazil. Scan sampling was done for 23 months, recording the behavior and substrate used by the individuals.Results: The ground use rate was 41%, with no sex difference but an age difference: infants were less terrestrial than juveniles and adults.Discussion: Compared to a population with a more limited tool use repertoire (Fazenda Boa Vista), SCNP adult capuchins are more terrestrial (43% v. 27%). Stone tool use diversity and terrestriality in capuchins appear to be positively correlated. Our results support this hypothesis and provide terrestriality measurements of the wild capuchin population with the most complex stone tool kit. (AU)

• Processo FAPESP: 06/07190-6 - Estudo do uso de ferramentas em populações de macacos-prego (Cebus libidinosus) do Parque Nacional da Serra da Capivara, PI
• Beneficiário: Eduardo Benedicto Ottoni
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/01292-9 - Variação cultural em macacos-prego (Sapajus spp.)
• Beneficiário: Tiago Falótico
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 06/07187-5 - Estudo do uso de ferramentas em populações de macacos-prego (Cebus libidinosus) do Parque Nacional da Serra da Capivara - PI
• Beneficiário: Tiago Falótico
• Modalidade de apoio: Bolsas no Brasil - Doutorado