Biological Characteristics of Schizothorax pseudaksaiensis

【Objective】 To research the system biology of Schizothorax pseudaksaiensis in Turks River from Ili river. 【Method】 From 2018 to 2020,to collected sampling of Schizothorax pseudaksaiensis,using traditional measurement methods to identify biological and age, analyze its growth characteristics. 【Result】 The morphological characteristics of the Turks River Schizothorax pseudaksaiensis were slightly different from those of other water system Schizothorax. There was no hard keratin in the lower edge of the mouth; the back of the body was finely scaled and the buttocks were more developed; the back of the body was light blue and slightly yellow, The sides and abdomen are silvery white, and there are spots on the sides of small individuals. Schizothorax pseudaksaiensis, The body length means is（21.56±10.48） cm, it is too distributed. The mean weight means is（404.00±483.11） g, it is too distributed. The age mean is 7.36±3.97⁺,the age is too distributed, superior individuals ages 5⁺;Length and weight relationships: W=0.022L³（R²=0.959 4）;Progressive length L∞=65.48 cm,the coefficient of growth k=0.06,W∞=4 716.67 g,t₀ = 0.09,t_i=18.40⁺;The population（n=105） of progressive length and weight growth relationship: L_t = 65.48（1-e^{-0.06（t -0.09）}）, W_t = 4716.67（1-e^{-0.06（t -0.09）}）³.The population of GSI and fullness: GSI=（3.54±1.94）, K=（2.34±0.63）. 【Conclusion】 The Turks River Schizothorax pseudaksaiensis in the Ili River water system, Schizothorax pseudaksaiensis is a large Local fish with fine scales. Its age structure is quite different, grows at a uniform speed, and has strong adaptability. The waters of the Turks River have better ecology, Fish have a long growth cycle, relatively stable traits, an older turning point, a long sexual maturity cycle, and a sharp decline in resources. To carry out the construction of germplasm resource protection zones to consolidate the ecological balance of fishery resources in the upstream tributaries of the Ili River.