Because it was not illegal under ROC law to fish along the river, the villagers would usually just try to persuade outsiders not to fish there. When persuasion failed, they would throw pebbles in the water to scare away the fish.
於達娜伊谷溪垂釣並不違法，所以山美村人大多以勸說的方式，向外來釣客說明護溪的緣由，如果勸說無效，村民就會丟石頭驚擾魚群。