"In principle," says Tseng Ch'ing hsien of the National Taiwan Science Education Centre, "there should be no trout in Taiwan." Trout belong to moderate temperature regions, swimming in water of 16 ℃. In the semi-tropical climate of Taiwan, only in waters 1500 meters above sea level can such temperatures be found.
「因為台灣『不應該』有鱒魚」，曾晴賢說，鱒魚是溫帶魚類，它必須生長在水溫攝氏十六度的溪流；副熱帶的台灣溪流，只有在一千五百公尺以上的上游，才有十六度的平均溫。