Abstract: Schizothorax lissolabiatus is distributed in the Nanpan River, the Beipan River, the Yuanjiang River, the Lancang River, and the Nujiang River. A total of 261 specimens (body length between 105 and 326 mm) were collected from the Beipan River during 2008 and 2009. The characteristics of annuli on scale, opercular, dorsal fin spine and cleithrum of the species were described and compared and the ages of inviduals were diagnosed according to the annuli of scales. The results showed that the relationship between body length (L) and scale radius (R) of S. lissolabiatus was estimated as L=20.202R+65.726, and the body length (L)-weight (W) relationship might be calculated by the power relationship: W=4×10^-5L^2.8208. The Von Bertalanffy equations of the species were concluated as L_t=475.51［1-e^{-0.138 (t+1.1397}］, W_t=1424.93［1-e^{-0.138(t+1.1397)}］^2.8208; the growth inflection age was year 6.37. The Von Bertalanffy growth function, Logistic growth function and Gompertz growth function of S. lissolabiatus all might describe exactly the growth of its length and weight, and the Von Bertalanffy growth function was the most suitable model to fit  its growth of length and weight. The growth of length of individuals of S. lissolabiatus at the age of 1year to 4 years was much faster than those of more than 5 years. According to the 8ecological parameters of the species, it was concluded that S. lissolabiatus tends to be a r-selected species.

Key words: Lacertidae, Eremias brenchleyi, Sexual dimorphism, Food habit, Food, Niche breadth, Niche overlap