The delicate balance of ecosystems ensures their survival—if they are left unaltered. Natural predators help maintain this balance by killing only the sickest and weakest individuals. Hunters, however, kill any animal whose head they would like to hang over the fireplace—including large, healthy animals who are needed to keep the population strong. Elephant poaching is believed to have increased the number of tuskless animals in Africa, and in Canada, hunting has caused bighorn sheep’s horn size to fall by 25 percent in the last 40 years. Nature magazine reports that “the effect on the populations’ genetics is probably deeper.”11
Even when unusual natural occurrences cause overpopulation, natural processes work to stabilize the group. Starvation and disease can be tragic, but they are nature’s ways of ensuring that healthy, strong animals survive and maintain the strength of the rest of their herd or group. Shooting an animal because he or she might starve or get sick is arbitrary and destructive.
Another problem with hunting involves the introduction of exotic “game” animals who, if they’re able to escape and thrive, pose a threat to native wildlife and established ecosystems.