Abstract:
OBJECTIVES:Great apes show considerable diversity in socioecology and life history, but knowledge of their physical growth in natural settings is scarce. We characterized linear body size growth in wild mountain gorillas from Volcanoes National Park, Rwanda, a population distinguished by its extreme folivory and accelerated life histories. METHODS:In 131 individuals (0.09-35.26 years), we used non-invasive parallel laser photogrammetry to measure body length, back width, arm length and two head dimensions. Nonparametric LOESS regression was used to characterize cross-sectional distance and velocity growth curves for males and females, and consider links with key life history milestones. RESULTS:Sex differences became evident between 8.5 and 10.0 years of age. Thereafter, female growth velocities declined, while males showed increased growth velocities until 10.0-14.5 years across dimensions. Body dimensions varied in growth; females and males reached 98% of maximum body length at 11.7 and 13.1 years, respectively. Females attained 95.3% of maximum body length by mean age at first birth. Neonates were 31% of maternal size, and doubled in size by mean weaning age. Males reached maximum body and arm length and back width before emigration, but experienced continued growth in head dimensions. CONCLUSIONS:While comparable data are scarce, our findings provide preliminary support for the prediction that mountain gorillas reach maximum body size at earlier ages compared to more frugivorous western gorillas. Data from other wild populations are needed to better understand comparative great ape development, and investigate links between trajectories of physical, behavioral, and reproductive maturation.
journal_name
Am J Phys Anthropoljournal_title
American journal of physical anthropologyauthors
Galbany J,Abavandimwe D,Vakiener M,Eckardt W,Mudakikwa A,Ndagijimana F,Stoinski TS,McFarlin SCdoi
10.1002/ajpa.23232subject
Has Abstractpub_date
2017-07-01 00:00:00pages
570-590issue
3eissn
0002-9483issn
1096-8644journal_volume
163pub_type
杂志文章abstract::An examination of the Vértesszöllös occipital bone indicates the need for takings its condition and preservation as well as certain aspects of its morphology into account prior to a metric assessment of its features. This analysis confirms the presence of extrasutural bones on the lambdoidal suture as well as some dis...
journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
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journal_title:American journal of physical anthropology
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journal_title:American journal of physical anthropology
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