Bipedal Behaviour in Olive Baboons: Infants versus Adults in a Captive Environment

Druelle, François; Bérillon, Gilles

doi:10.1159/000353115

Cited by 16 publications

(27 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Just after birth, baboons only possess grasping abilities, but it has been shown that growing infants rapidly include quadrupedal walking and suspensory, climbing and leaping behaviour in their repertoire. As a result, infants exhibit a more diverse repertoire than adults (Druelle & Berillon, 2013). Furthermore, according to previous behavioural and biomechanical observations (Altmann & Samuels, 1992;Raichlen, 2005a;Druelle et al in press), an autonomous locomotor profile is established in the first year of life, during which the functional demands on the limbs change in parallel with significant morphological changes.…”

Section: Introductionmentioning

confidence: 87%

“…; Berillon et al. ; Druelle & Berillon, ; see Supporting Information Table S1 for information on the individuals).…”

Section: Methodsmentioning

confidence: 99%

“…The individuals were measured every 3 months until they were 2 years old and then every 6 months. All the individuals studied are part of the same troop and live together in a large park with various enrichments (Anvari et al 2014;Berillon et al 2010;Druelle & Berillon, 2013; see Supporting Information Table S1 for information on the individuals).…”

Section: Study Site and Subjectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Segmental morphometrics of the olive baboon (Papio anubis): a longitudinal study from birth to adulthood

et al. 2017

Self Cite

View full text Add to dashboard Cite

The linear dimensions and inertial characteristics of the body are important in locomotion and they change considerably during the ontogeny of animals, including humans. This longitudinal and ontogenetic study has produced the largest dataset to date of segmental morphometrics in a Catarrhini species, the olive baboon. The objectives of the study were to quantify the changes in body linear and inertial dimensions and to explore their (theoretical) mechanical significance for locomotion. We took full‐body measurements of captive individuals at regular intervals. Altogether, 14 females and 16 males were followed over a 7‐year period, i.e. from infancy to adulthood. Our results show that individual patterns of growth are very consistent and follow the general growth pattern previously described in olive baboons. Furthermore, we obtained similar growth curve structures for segment lengths and masses, although the respective time scales were slightly different. The most significant changes in body morphometrics occurred during the first 2 years of life and concerned the distal parts of the body. Females and males were similar in size and shape at birth. The rate and duration of growth produced substantial size‐related differences throughout ontogeny, while body shapes remained very similar between the sexes. We also observed significant age‐related variations in limb composition, with a proximal shift of the centre of mass within the limbs, mainly due to changes in mass distribution and in the length of distal segments. Finally, we observed what we hypothesize to be ‘early biomechanical optimization’ of the limbs for quadrupedal walking. This is due to a high degree of convergence between the limbs’ natural pendular periods in infants, which may facilitate the onset of quadrupedal walking. Furthermore, the mechanical significance of the morphological changes observed in growing baboons may be related to changing functional demands with the onset of autonomous (quadrupedal) locomotion. From a wider perspective, these data provide unique insights into questions surrounding both the processes of locomotor development in primates and how these processes might evolve.

show abstract

Section: Introductionmentioning

confidence: 87%

“…; Berillon et al. ; Druelle & Berillon, ; see Supporting Information Table S1 for information on the individuals).…”

Section: Methodsmentioning

confidence: 99%

Section: Study Site and Subjectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Segmental morphometrics of the olive baboon (Papio anubis): a longitudinal study from birth to adulthood

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…6% versus 1.8% respectively for bipedal walking in Pan, [14] and 1.73% versus 0% respectively in Papio [15]) (see also [2,[16][17][18]). …”

Section: Quantitative Behavioural Studies Of Bipedalismmentioning

confidence: 88%

Bipedalism in non-human primates: a comparative review of behavioural and experimental explorations on catarrhines

Druelle

Bérillon²

2014

BMSAP

View full text Add to dashboard Cite

show abstract

Effect of body mass distribution on the ontogeny of positional behaviors in non‐human primates: Longitudinal follow‐up of infant captive olive baboons (Papio anubis)

Druelle

Aerts

Bérillon

2016

American J Primatol

Self Cite

View full text Add to dashboard Cite

The diversity of primates' positional capabilities is unique among mammals. Indeed, they exhibit a daily repertoire composed of various locomotor and postural modes that may be linked to their particular morphological pattern. Because ontogeny undergoes parallel behavioral and morphological modifications, it may be useful to investigate the biomechanical consequences of the changing body shape. We, therefore, collected accurate quantitative and longitudinal data on positional behaviors, body mass distribution patterns, activities, and environment on a sample of six infant olive baboons, Papio anubis. These baboons are kept at the Primatology Station of the CNRS, France, where they live within the same social group. Individual behaviors were quantified using the focal sampling method. The body mass distribution was estimated according to a geometric model based on direct external measurements. Multivariate analysis enabled us to analyze the interactions between the data. Our results show that body mass distribution changes together with the ontogenetic changes in positional behaviors. At an early age, individuals have distally heavy segment masses in the limbs and an important fraction of the behavioral repertoire involves efficient grasping abilities. At the end of infancy, the same individuals have relatively more mass in proximal segments of the limbs and the proportion of quadrupedal walking is significantly higher while other climbing and suspensory behaviors decreased substantially. The present study experimentally confirms the association between body mass distribution and the positional repertoire of primates. These relationships, when interpreted in the context of basic biomechanical concepts, may improve our understanding of primate locomotion. We discuss further the implications of these functional relationships when modeling the evolutionary pathway of primates. Am. J. Primatol. 78:1201-1221, 2016. © 2016 Wiley Periodicals, Inc.

show abstract

Bipedal Behaviour in Olive Baboons: Infants versus Adults in a Captive Environment

Cited by 16 publications

References 41 publications

Segmental morphometrics of the olive baboon (Papio anubis): a longitudinal study from birth to adulthood

Segmental morphometrics of the olive baboon (Papio anubis): a longitudinal study from birth to adulthood

Bipedalism in non-human primates: a comparative review of behavioural and experimental explorations on catarrhines

Effect of body mass distribution on the ontogeny of positional behaviors in non‐human primates: Longitudinal follow‐up of infant captive olive baboons (Papio anubis)

Contact Info

Product

Resources

About