Minimal age-related variation in bipedal behavior in Sapajus

Our understanding of how bipedalism evolved in hominins has been refined through studies of bipedal behavior in non-human primates, both in the wild and in the laboratory. Bipedal behavior in non-human primates makes up a relatively small portion of their behavioral repertoire. Understanding when bi...

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Main Authors: Kristin A. Wright, Dorothy M. Fragaszy
Format: Article
Language:English
Published: Société Francophone de Primatologie 2022-03-01
Series:Revue de Primatologie
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Online Access:https://journals.openedition.org/primatologie/11618
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author Kristin A. Wright
Dorothy M. Fragaszy
author_facet Kristin A. Wright
Dorothy M. Fragaszy
author_sort Kristin A. Wright
collection DOAJ
description Our understanding of how bipedalism evolved in hominins has been refined through studies of bipedal behavior in non-human primates, both in the wild and in the laboratory. Bipedal behavior in non-human primates makes up a relatively small portion of their behavioral repertoire. Understanding when bipedal behaviors occur and how bipedal behaviors emerge can provide further insight into the context in which bipedal behaviors may have evolved. Here, we examine age-related variation in bipedal behavior in wild bearded capuchins (Sapajus libidinosus). 2,209 records of bipedal posture and locomotion, activity state, and substrate used during bipedal behavior (17.2% of all records of positional behavior) were examined for individuals ranging from 3 months to 15 years or older in two groups (32 individuals in total). Apart from very young individuals that were carried by older conspecifics, individuals of all ages showed similar rates and patterns of bipedal behaviors. Bipedal postures were used predominantly during feeding and foraging, most often in arboreal settings, and most often with their prehensile tail grasping, or in contact with, the substrate. Bipedal locomotion occurred most often on terrestrial substrates and comprised only 3% of all records of bipedal behavior.
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spelling doaj-art-627d3ce0ebbb47c2b90129d5c25f00862025-01-30T10:01:37ZengSociété Francophone de PrimatologieRevue de Primatologie2077-37572022-03-011210.4000/primatologie.11618Minimal age-related variation in bipedal behavior in SapajusKristin A. WrightDorothy M. FragaszyOur understanding of how bipedalism evolved in hominins has been refined through studies of bipedal behavior in non-human primates, both in the wild and in the laboratory. Bipedal behavior in non-human primates makes up a relatively small portion of their behavioral repertoire. Understanding when bipedal behaviors occur and how bipedal behaviors emerge can provide further insight into the context in which bipedal behaviors may have evolved. Here, we examine age-related variation in bipedal behavior in wild bearded capuchins (Sapajus libidinosus). 2,209 records of bipedal posture and locomotion, activity state, and substrate used during bipedal behavior (17.2% of all records of positional behavior) were examined for individuals ranging from 3 months to 15 years or older in two groups (32 individuals in total). Apart from very young individuals that were carried by older conspecifics, individuals of all ages showed similar rates and patterns of bipedal behaviors. Bipedal postures were used predominantly during feeding and foraging, most often in arboreal settings, and most often with their prehensile tail grasping, or in contact with, the substrate. Bipedal locomotion occurred most often on terrestrial substrates and comprised only 3% of all records of bipedal behavior.https://journals.openedition.org/primatologie/11618terrestrialitySapajuspositional behaviorontogeny
spellingShingle Kristin A. Wright
Dorothy M. Fragaszy
Minimal age-related variation in bipedal behavior in Sapajus
Revue de Primatologie
terrestriality
Sapajus
positional behavior
ontogeny
title Minimal age-related variation in bipedal behavior in Sapajus
title_full Minimal age-related variation in bipedal behavior in Sapajus
title_fullStr Minimal age-related variation in bipedal behavior in Sapajus
title_full_unstemmed Minimal age-related variation in bipedal behavior in Sapajus
title_short Minimal age-related variation in bipedal behavior in Sapajus
title_sort minimal age related variation in bipedal behavior in sapajus
topic terrestriality
Sapajus
positional behavior
ontogeny
url https://journals.openedition.org/primatologie/11618
work_keys_str_mv AT kristinawright minimalagerelatedvariationinbipedalbehaviorinsapajus
AT dorothymfragaszy minimalagerelatedvariationinbipedalbehaviorinsapajus