Maria Granell-Ruiz

The paper finds that participation in between-group conflicts in wild vervet monkeys is linked to lower long-term cortisol levels, suggesting physiological benefits of cooperative behavior.

This study examines male services in vervet monkeys, finding that certain behaviors predict mating success, supporting reputation-based partner choice as a driver of cooperation.

The study examines grooming exchanges between male-female vervet monkeys, finding that females initially invest heavily and reduce grooming over time, while males increase frequency after residency, leading to near reciprocity.