Abstract: Based on the 2005-2007 investigation data of fishery resources in Panzhihua, Yibin, Hejiang, Mudong, and Wanzhou of the upper reaches of Yangtze River, and by using length-frequency method (FiSAT Ⅱ package), this paper estimated the growth and mortality of Rhinogobio ventralis. The regression equation of the body weight and body length of R. ventralis could be expressed as W=8×10^-6L^3.1577, and the parameters in von Bertalanffy formula estimated by Shepherd’s method were L_∞＝530.5 mm, K＝0.21 a^-1, and t₀＝-0.5 a. The natural mortality coefficient calculated with Pauly’s empirical equation was M=0.24, the total mortality coefficient estimated by the length-converted catch curve was Z＝2.67, and the fishing mortality coefficient was F=2.43. Recruitment pattern analysis indicated that R. ventralis had a recruitment period from May to September, its exploitation rate in recent years was 91.2%, and its resource was at the state of overexploitation.

Key words: Heishiding, Lower subtropical forests, Biomass, NPP, Succession