Tufted capuchin monkeys (Sapajus sp) learning how to crack nuts: Does variability decline throughout development?

Author(s)

Resende, Briseida Dogo ; Nagy-Reis, Mariana Baldy ; Lacerda, Fernanda Neves ; Pagnotta, Murillo ; Savalli, Carine

• Document type: Journal article
• Source: Behavioural Processes; v. 109, p. 6-pg., 2014-11-01.

Abstract

We investigated the process of nut-cracking acquisition in a semi-free population of tufted capuchin monkeys (Sapajus sp) in Sao Paulo, Brazil. We analyzed the cracking episodes from monkeys of different ages and found that variability of actions related to cracking declined. Inept movements were more frequent in juveniles, which also showed an improvement on efficient striking. The most effective behavioral sequence for cracking was more frequently used by the most experienced monkeys, which also used nonoptimal sequences. Variability in behavior sequences and actions may allow adaptive changes to behavior under changing environmental conditions. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 99/11573-2 - Ontogeny of manipulative behavior in a semifree-ranging group of Tufted capuchin monkeys (Cebus apella)
• Grantee: Briseida Dôgo de Resende
• Support Opportunities: Scholarships in Brazil - Doctorate