About Hynobius arisanensis Maki, 1922
Hynobius arisanensis, commonly called the Alishan salamander, is a species of salamander in the family Hynobiidae that is endemic to Taiwan. It is found in the Alishan Range, the Yushan Range, and the southern Central Mountain Range, at altitudes between 1,800 and 3,600 m (5,900–11,800 ft) above sea level. Its natural habitats are temperate forests, rivers, and freshwater springs, and it typically hides during the day. Adult H. arisanensis have a snout–vent length of 5.0–6.5 cm (2.0–2.6 in). The dorsal side of their body is blackish-brown to reddish-brown, while their ventral side is somewhat lighter brown or grey-brown. A study of H. arisanensis in the Alishan Range found that adult individuals have home ranges of up to 500 m², with a mean home range size of 65 m². Survival rates are high for both adults and juveniles: 0.996 for adults and 0.977 for juveniles. The estimated population growth ratio is 1.077, indicating the population appears to be stable or slightly increasing. This species occurs in coniferous and broadleaf woodlands near streams, always at altitudes above 1,800 m (5,900 ft), and it is considered rare. It probably breeds in streams, and its larvae develop in water.
