Bygott J.D

Highlights • Evidence of sex-modulated social aging in a wild lion population over 30 years • Female connectivity declines with age, while average group size increases • Male connectivity peaks in mid-life to males but dips in mid-life to females • Connectivity is key to female longevity but associate numbers are key for males Summary 1 Woodman J. Gokcekus S. Beck K. Green J. Nussey D. Firth J. The ecology of aging in wild societies: linking age structure and social behaviour in natural populations.

Highlights • Kokolopori bonobos show higher rates of male-male aggression than Gombe chimpanzees • Those results remain true when limiting analyses to contact aggression • In both populations, more aggressive males obtained higher mating success • Male chimpanzees form more coalitions than male bonobos Summary Researchers investigating the evolution of human aggression look to our closest living relatives, bonobos (Pan paniscus) and chimpanzees (Pan troglodytes), as valuable sources of...

Highlights • Three independent pathways linked male chimpanzee sociality and siring success • Alphas, but not others with high rank, sired a disproportionate share of offspring • Subordinates with strong bonds with the alpha had better siring success • Subordinates with many strong ties to other subordinates had better siring success Summary In most male mammals, fitness is strongly shaped by competitive access to mates, a non-shareable resource.