Ontogenetic changes in orangutan brain evolution: Is it heterochrony?

Date

2012-05

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Abstract

During the last 40 million years of primate brain evolution, intriguing changes have arisen. A problem faced by large bodied primates is the issue of how to birth a large brained offspring from a relatively small birth canal. This study analyzes the ontogenetic changes in the evolution of the orangutan brain that aids in the birthing of large brained offspring. The growth of the orangutan brain is plotted and compared with the growth trajectories of humans, macaques, squirrel monkeys and chimpanzees.

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Keywords

Primate field studies, Brain evolution, Orangutan, Heterochrony (Biology), Evolution, Ontogeny

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