Researchers at Bielefeld University and the Technische Universität Braunschweig are the first to confirm the benefit of multiple paternities for a vertebrate under completely natural conditions. Together with their team, Dr. Barbara Caspers and Dr. Sebastian Steinfartz have shown that female fire salamanders mate with several males under natural conditions (so-called polyandry). This grants them fitness-relevant benefits by increasing their number of offspring. The results of their study are being published this Friday (29 November) in the Early View version of Molecular Ecology.
Since humans have sex for many reasons, not just reproduction, it can have other benefits in humans.