Capuchin monkeys use only proto-tools to crack jatobá hard-shelled fruits in an urban environment

Claudio Herbert Nina e Silva, Olhiga Ivanoff, Eliane Andreia dos Santos Oliveira

Abstract


The goal of this study was to describe a nut-cracking behavior by six adult bearded capuchin monkeys of a group living on an urban protected area called Bosque Bougainville in the city of Goiânia, central Brazil. The nut-cracking events, occurring with jatobá (Hymenaea stygonocarpa Mart.), were recorded in digital video and classified in terms of behavioral categories of nut-cracking: proto-tool use and tool-use. The nut-cracking behavior was also quantified and analyzed by means of TOTE motor unit categories. All jatobá nut-cracking events records were of the proto-tool use category. The successful jatobá nut-cracking (complete TOTE motor units) occurred in most of the recorded events for all animals. The absence of tool-use records was explained by the ecological circumstances at the Bosque Bougainville and by the high level of efficacy of proto-tool used in jatobá nut-cracking.

Keywords: foraging, tools, motor control, animal cognition.


Full Text: PDF



ISSN: 2236-3777 - Best viewed in Mozilla Firefox

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License

São Leopoldo, RS. Av. Unisinos, 950. Bairro Cristo Rei, CEP: 93.022 -000. Atendimento Unisinos +55 (51) 3591 1122
Designed by Jully Rodrigues


SCImago Journal & Country Rank