The segments up from dam no . 3 with the excellent temperature regimes , various habitat types and satisfactory tree coverage can be classified as superior habitats for the formosan landlocked salmon 三號壩以上無論是水溫、棲地類型豐富度、罩蓋度均可歸類為良好棲地,建議持續上游放流工作,擴大上游族群。