Figure 1
From: The costs of dominance: testosterone, cortisol and intestinal parasites in wild male chimpanzees
Low ranking adult male chimpanzee grooming a high ranking male at Ngogo.
Figure 1 | BioPsychoSocial Medicine
From: The costs of dominance: testosterone, cortisol and intestinal parasites in wild male chimpanzees
Low ranking adult male chimpanzee grooming a high ranking male at Ngogo.