Just as a given amount of land can only produce a finite amount of grazing, and a limited amount of grazing can only support a limited number of grazing animals, so a given number of grazing animals can only sustain a limited number of predators. Similar limitations apply to all living things, and are known as the carrying capacity of a physical area. If males' burdens are more likely to draw the interest of local predators, then such males effectively shift predation away from females and their young. In this case, the females and young will gain an added benefit from decreased predation, and enjoy even higher rates of survivability.