Neocortex size and social network size in primates

摘要: Primates use social grooming to service coalitions and it has been suggested that these directly affect the fitness of their members by allowing them reduce intrinsic costs associated with living in large groups. We tested two hypotheses about size cliques derive from this suggestion: (1) clique should correlate relative neocortex (2) be proportional groups they have support. Both predictions were confirmed, although we show that, respect size, there are as many four statistically distinct grades within primates (including humans). Analysis patterns among males females primate often consist a set smaller female subgroups (in some cases, matrilinearly based coalitions) linked individual males. This may because insert themselves into interstices between weakly bonded rather than actually hold subunits together.