Competition, cooperation and hormones in chimpanzees and bonobos

The study of similarities and differences in behavior and physiology between humans and great apes allow for a better understanding of human evolution. Researchers of the Department of Primatology at the Max Planck Institute for Evolutionary Anthropology in Leipzig investigate with the help of behavioral observations and the measurement of physiological parameters in the urine of free living apes how competition and cooperation influence the excretion of a number of hormones.