Why must an AK driver contact a state trooper or fish and wildlife officer if a collision with a big game animal, like a deer or a moose, occurs?

Wild animals are the property of the state of Alaska. If you collide with a large mammal like a deer, moose, elk, or bear, contact a state trooper or fish and wildlife officer. These animals cause hazards on the road and can spread diseases to humans. [Animals, Alaska Driver Manual]