Greater variability in rhesus macaque (Macaca mulatta) endocranial volume among males than females.

ABSTRACT: The greater male variability (GMV) hypothesis proposes that traits are more variable among males than females, and is supported by numerous empirical studies. Interestingly, GMV is also observed for human brain size and internal brain structure, a pattern which may have implications for sex-biased neurological and psychiatric conditions. A better understanding of neuroanatomical variability in non-human primates may illuminate whether certain species are appropriate models for these conditions. Here, we tested for sex differences in the variability of endocranial volume (ECV, a proxy for brain size) in a sample of 542 rhesus macaques (Macaca mulatta) from a large pedigreed free-ranging population. We also examined the components of phenotypic variance (additive genetic and residual

SUBMITTER: Colby AE 

PROVIDER: S-EPMC9653222 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature