Preliminary observations of complex object manipulation in a wild population of Sapajus cay Illiger 1815 (Primates: Cebidae) in a fragment of upper Paraná Atlantic Forest, Rancho Laguna Blanca, eastern Paraguay

Rebecca L Smith

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Capuchin monkeys are known for their cognitive abilities, including object manipulation and use of a variety of tools. The hooded capuchin (Sapajus cay) is the only representative of its genus found in Paraguay and is critically understudied in the country. This paper reports on preliminary observations of a group of hooded capuchins, in Rancho Laguna Blanca, San Pedro, Paraguay, using two different first-order object manipulation techniques to open the seeds of the tree Cariniana estrellensis (Lecythidaceae). Some individuals held the seed in both hands and stood bipedally, using their entire body weight to smash the seed against a branch. The more commonly observed technique involved the monkeys holding the seed in one hand and repeatedly striking the branch with the fruit until they could extract the seed. Only adults were ever observed to be successful in opening the fruits.
Original languageEnglish
Pages (from-to)75-80
Number of pages6
JournalActa Ethologica
Volume20
Issue number1
Early online date4 Nov 2016
DOIs
Publication statusPublished - Feb 2017

Keywords

  • Combinatorial activities
  • Destructive foraging
  • Hooded capuchin
  • Paraguay
  • Upper Paraná Atlantic Forest

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