How male bedbugs avoid getting shafted

 作者:詹尿     |      日期:2019-03-08 03:14:08
BEDBUGS are notoriously undiscerning about who they mount, and are wont to stab their penis straight into another male’s abdomen. Now it seems they have evolved a way of telling mistaken mounters to back off. Female bedbugs have a structure beneath their carapace to guide the penis into a mass of infection-fighting immune cells, but males have no such protection. Camilla Ryne at Lund University in Sweden found that they respond instead by emitting a pheromone normally used to warn off predators. Males with blocked glands were mounted as often as other males,