The trout farmers build rows of fish breeding pools like terraced fields along the banks of the rivers. River fish are fish owls 'favorite food, and quite a few trout farmers have said that they have seen or even captured tawny fish owls which were "stealing" their trout.
由於養鱒場在溪旁築了如梯田般的養殖池，溪魚原是魚鴞的最愛，有好幾家養鱒場表示以前見過、抓過「偷食」鱒魚的黃魚鴞。