Tufted capuchin monkeys (Sapajus sp) learning how to crack nuts : does variability decline throughout development?
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We investigated the process of nut-cracking acquisition in a semi-free population of tufted capuchin monkeys (Sapajus sp) in São 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 non-optimal sequences. Variability in behavior sequences and actions may allow adaptive changes to behavior under changing environmental conditions.
Resende , B D , Nagy-Reis , M B , Lacerda , F N , Pagnotta , M & Savalli , C 2014 , ' Tufted capuchin monkeys ( Sapajus sp ) learning how to crack nuts : does variability decline throughout development? ' Behavioural Processes , vol 109 , no. Part A , pp. 89-94 . DOI: 10.1016/j.beproc.2014.09.002
© 2014 Elsevier B.V. All rights reserved. This is the author’s version of a work that was accepted for publication in Behavioural Processes. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Behavioural Processes, 109, Part A, November 2014 DOI 10.1016/j.beproc.2014.09.002
This work was supported by CAPES and FAPESP grants (99/11573-2; 2007/57618-5). Date of Acceptance: 03/09/2014
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