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

Fingerprint

Cebidae
Paraguay
wild population
primate
Primates
seed
Cariniana
hands
seeds
Lecythidaceae
fruits
seed trees
Cebus
seed extracts
fruit
monkeys
body weight
methodology

Keywords

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

Cite this

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title = "Preliminary observations of complex object manipulation in a wild population of Sapajus cay Illiger 1815 (Primates: Cebidae) in a fragment of upper Paran{\'a} Atlantic Forest, Rancho Laguna Blanca, eastern Paraguay",
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.",
keywords = "Combinatorial activities, Destructive foraging , Hooded capuchin, Paraguay , Upper Paran{\'a} Atlantic Forest",
author = "Smith, {Rebecca L}",
note = "Thanks to Jorge Ayala for assistance with tree identification. I am grateful to Paul Smith, Susan Smith, Emily Briggs and two anonymous reviewers for extremely helpful comments on drafts of this paper. Thanks to the SEAM and Malvina Duarte for continued support of Fundaci{\'o}n Para La Tierra’s projects.",
year = "2017",
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AU - Smith, Rebecca L

N1 - Thanks to Jorge Ayala for assistance with tree identification. I am grateful to Paul Smith, Susan Smith, Emily Briggs and two anonymous reviewers for extremely helpful comments on drafts of this paper. Thanks to the SEAM and Malvina Duarte for continued support of Fundación Para La Tierra’s projects.

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N2 - 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.

AB - 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.

KW - Combinatorial activities

KW - Destructive foraging

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KW - Upper Paraná Atlantic Forest

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