When a species, owing to highly favourable circumstances, increases inordinately in numbers in a small tract, epidemics—at least, this seems generally to occur with our game animals—often ensue; and here we have a limiting check independent of the struggle for life.

当一个物种， 由于非常有利的环境， 在一个小范围内数量过度增加时，流行病——至少， 这似乎通常发生在我们的猎物身上——经常随之而来；在这里，我们有一个独立于生存斗争的限制性检查。