They ate the poisoned bait that ranchers left for coyotes.

他们吃了牧场主留给土狼的毒饵。

So using poisoned bait probably will hurt the native fish we want to protect, but won't significantly reduce carp numbers.

因此，使用毒饵可能会伤害我们想要保护的本地鱼类，但不会显着减少鲤鱼的数量。