Neither kin selection nor familiarity explain affiliative biases towards maternal siblings in wild mountain gorillas
N. Grebe, J. P. Hirwa, T. S. Stoinski, L. Vigilant, S. Rosenbaum
The study shows wild mountain gorillas show affiliative preferences for maternal siblings over paternal siblings or non-kin, despite similar aggression rates among dyads, suggesting complex social dynamics.
bioRxiv · Jun 14, 2022Animal Behavior & Cognition